The biology of Trichogramma pretiosum as atmospheric O2 becomes depleted and CO2 accumulates
This study evaluated the effect of modified atmospheric concentrations of O2 and CO2 on the biology of Trichogramma pretiosum Riley. For this purpose, cards with five different quantities of parasitized eggs were kept in hermetically sealed vials producing five different atmospheres as a function of different parasitoid respiration levels. Controls consisted of egg cards kept in an ambient atmosphere in ventilated vials. Concentrations of O2 and CO2 in vials were measured daily with a gas analyzer. No parasitoids emerged from vials where the CO2 concentration exceeded 16% and O2 was less than 2.5%. Only 47% of T. pretiosum...
Source: Biological Control - November 12, 2016 Category: Biology Source Type: research

Supplying high-quality alternative prey in the litter increases control of an above-ground plant pest by a generalist predator
Publication date: Available online 9 November 2016 Source:Biological Control Author(s): Karen Muñoz-Cárdenas, Firdevs Ersin, Juliette Pijnakker, Yvonne van Houten, Hans Hoogerbrugge, Ada Leman, Maria L. Pappas, Marcus V.A. Duarte, Gerben J. Messelink, Maurice W. Sabelis, Arne Janssen Supplying predators with alternative food can have short-term positive effects on prey densities through predator satiation (functional response) and long-term negative effects through increases of predator populations (numerical response). In biological control, alternative food sources for predators are normally supplied on th...
Source: Biological Control - November 10, 2016 Category: Biology Source Type: research

Interaction of the predatory ant Pheidole megacephala (Hymenoptera: Formicidae) with the polyphagus pest Xylosandrus compactus (Coleoptera: Curculionidea)
Publication date: Available online 9 November 2016 Source:Biological Control Author(s): Rajab Ogogol, James P. Egonyu, Godfrey Bwogi, Samuel Kyamanywa, Mark Erbaugh We evaluated the potential of using Pheidole megacephala as a biological control agent against the coffee twig borer Xylosandrus compactus (Eichhoff), an economically important pest of Robusta coffee in Uganda. Upon observing that P. megacephala was common in coffee fields infested by X. compactus, we tested hypotheses that (1) P. megacephala feeds on all stages of X. compactus, (2) P. megacephala can enter galleries of X. compactus inside coffee twigs in sear...
Source: Biological Control - November 9, 2016 Category: Biology Source Type: research

Pseudomonas putida - Induced Response in Phenolic Profile of Tomato Seedlings (Solanum lycopersicum L.) Infected by Clavibacter michiganensis subsp. michiganensis
Publication date: Available online 7 November 2016 Source:Biological Control Author(s): Hasan Murat Aksoy, Yilmaz Kaya, Murat Ozturk, Zafer Secgin, Hasan Onder, Ahmet Okumus Efficacy of Pseudomonas putida (CKPp9) was tested under in vitro and in vivo conditions for their ability to plant growth promoting characteristics in tomato seedlings against Clavibacter michiganensis subsp. michiganensis (CmmGo2) infection. A significant difference was observed between bacterized tomato seedlings with P. putida (CKPp9) and the other treatments (P<0.01). Also, CmmGo2 was detected significant difference the least plant growth p...
Source: Biological Control - November 7, 2016 Category: Biology Source Type: research

Endophytic Streptomyces spp. underscore induction of defense regulatory genes and confers resistance against Sclerotium rolfsii in chickpea
This study evaluated the potential of endophytic Streptomyces spp. viz., S. diastaticus, S. fradiae, S. olivochromogenes, S. collinus, S. ossamyceticus, and S. griseus to trigger systemic resistance and mitigate oxidative stress in chickpea against Sclerotium rolfsii. The role of endophytes stimulating systemic resistance was evaluated by seed treatments in pathogen inoculated chickpea. Substantial increase in defense related enzymes such as phenylalanine ammonia lyase (PAL) and polyphenol oxidase (PPO), along with the accumulation of total phenolics and flavonoids in S. griseus was noticed in plants inoculated with S. rol...
Source: Biological Control - November 2, 2016 Category: Biology Source Type: research

Crop molds and mycotoxins: Alternative management using biocontrol
Publication date: January 2017 Source:Biological Control, Volume 104 Author(s): Phuong-Anh Nguyen, Caroline Strub, Angélique Fontana, Sabine Schorr-Galindo Phytopathogenic and/or mycotoxigenic filamentous fungi are involved in a great number of plant diseases that cause yield and quality losses of crops. Besides the economic damages, these fungi produce mycotoxins that present health risks for humans and animals who consume contaminated foods. The most dangerous mycotoxins in the agriculture and the food industry that are regulated in European Union (trichothecenes especially deoxynivalenol, fumonisins, aflatoxins ...
Source: Biological Control - November 2, 2016 Category: Biology Source Type: research

Potential ecological effects of Piriformospora indica, a possible biocontrol agent, in UK agricultural systems
Publication date: January 2017 Source:Biological Control, Volume 104 Author(s): Mojgan Rabiey, Ihsan Ullah, Liz J. Shaw, Michael W. Shaw Piriformospora indica (syn. Serendipita indica), a root endophytic fungus, was originally isolated from an arid sub-tropical soil. P. indica forms mutualistic symbioses with a broad range of host plants, increases biomass production, resistance and tolerance to fungal pathogens and abiotic stresses. These characteristics make it a very attractive component of more sustainable agriculture. So, it is desirable to understand its wider ecosystem effects. We determined how long P. indica coul...
Source: Biological Control - November 1, 2016 Category: Biology Source Type: research

Endophytic Beauveria bassiana in grapevine Vitis vinifera (L.) reduces infestation with piercing-sucking insects
Publication date: Available online 22 October 2016 Source:Biological Control Author(s): Yvonne Rondot, Annette Reineke Fungi are important natural pathogens of arthropod pests and are successfully used as biocontrol agents in various crops. In addition to colonizing arthropods, evidence has accumulated that some entomopathogenic fungi like Beauveria bassiana can endophytically colonize a wide array of plant species. However, only limited information is currently available on the endophytic colonization of grapevines with B. bassiana and whether the fungus still maintains its pathogenic habit against insect pests. Greenhou...
Source: Biological Control - October 29, 2016 Category: Biology Source Type: research

Evaluation Of Biological Control Of Erwinia Amylovora, Causal Agent Of Fire Blight Disease Of Pear By Antagonistic Bacteria
Publication date: Available online 25 October 2016 Source:Biological Control Author(s): Mohamad Sharifazizi, Behrouz Harighi, Amin Sadeghi Fire blight caused by Erwinia amylovora is one of the most important diseases of pear and apple trees in Kurdistan province, Iran. To develop an effective biocontrol method against the pathogen, a total of 22 bacteria were isolated from above parts of pear trees and screened for in vitro antagonistic activity. Ten isolates inhibited the growth of the pathogen were identified by biochemical tests and partial sequencing of 16s rRNA or recA genes as Pantoea agglomerans (Pa9, Pa10, Pa21), ...
Source: Biological Control - October 29, 2016 Category: Biology Source Type: research

Identification and biocontrol potential of antagonistic bacteria strains against Sclerotinia sclerotiorum and their growth-promoting effects on Brassica napus
Publication date: Available online 27 October 2016 Source:Biological Control Author(s): Guangzheng Sun, Tuo Yao, Chanjing Feng, Long Chen, Jianhong Li, Lide Wang In order to assess the potential of plant growth promoting rhizobacteria (PGPR) to protect rapeseed plants against Sclerotinia sclerotiorum (Lib.) de Bary, antifungal properties and growth-promoting effects of PGPR were evaluated. Phosphate solubilization, nitrogenase and IAA secretion of 19 strains were tested. Out of 19 strains, 13 could solubilize phosphate (3.79–204.74 mg/L), 10 strains produced IAA (4.34–54.36 mg/L) and 14 strains had nitrogenase...
Source: Biological Control - October 29, 2016 Category: Biology Source Type: research

Optimizing production of Tamarixia radiata (Hymenoptera: Eulophidae), a parasitoid of the citrus greening disease vector Diaphorina citri (Hemiptera: Psylloidea)
Publication date: Available online 29 October 2016 Source:Biological Control Author(s): Xulin Chen, Monica Triana, Philip A. Stansly Tamarixia radiata (Waterston) (Hymenoptera: Eulophidae) established and spread throughout Florida following first release in 1999 for control of the Asian citrus psyllid (ACP) Diaphorina citri (Kuwayama) (Hemiptera: Psylloidea). Nevertheless, persistence of the pest and continued losses from citrus greening disease have created the need for more effective biological control, including mass rearing and augmentative release of T. radiata. However, information is lacking on efficiency of curren...
Source: Biological Control - October 29, 2016 Category: Biology Source Type: research

Spider predation on rosy apple aphid in conventional, organic and insecticide-free orchards and its impact on aphid populations
Publication date: Available online 29 October 2016 Source:Biological Control Author(s): Manon Lefebvre, Pierre Franck, Jérôme Olivares, Jean-Michel Ricard, Jean-François Mandrin, Claire Lavigne Spiders dwelling in the canopy of apple trees may contribute to the control of the rosy apple aphid (Dysaphis plantaginea) in spring. They are expected to be very efficient early in the season during aphid colony establishment. However, their predation on aphids may be impaired by insecticide treatments. In the present study, we aimed to assess the effectiveness of spider predation on D. plantaginea in apple orc...
Source: Biological Control - October 29, 2016 Category: Biology Source Type: research

Biological control adoption in western U.S. orchard systems: Results from grower surveys
Publication date: November 2016 Source:Biological Control, Volume 102 Author(s): Jessica R. Goldberger, Nadine Lehrer As part of a USDA Specialty Crop Research Initiative project to enhance biological control (BC) in western U.S. orchard systems, we surveyed walnut growers in California and pear growers in Oregon and Washington about their pest management decision-making and use of BC practices. Seventy-six percent of pear growers and 54% of walnut growers reported using one or more BC practices. BC users were more likely to minimize factors that harm natural enemies than enhance natural enemy habitats or release commerci...
Source: Biological Control - October 15, 2016 Category: Biology Source Type: research

Using plant volatile traps to develop phenology models for natural enemies: An example using Chrysopa nigricornis (Burmeister) (Neuroptera: Chrysopidae)
Publication date: November 2016 Source:Biological Control, Volume 102 Author(s): Vincent P. Jones, David R. Horton, Nicholas J. Mills, Thomas R. Unruh, Eugene Miliczky, Peter W. Shearer, Kaushalya G. Amarasekare, Callie C. Baker, Tawnee D. Melton A model predicting phenology of adult Chrysopa nigricornis (Burmeister) (Neuroptera: Chrysopidae) in orchards was developed from field (trapping) data supplemented with development data collected under laboratory conditions. Lower and upper thresholds of 10.1°C and 29.9°C, respectively, were estimated from published and unpublished laboratory observations, and were used t...
Source: Biological Control - October 15, 2016 Category: Biology Source Type: research

Comparative analysis of pesticide effects on natural enemies in western orchards: A synthesis of laboratory bioassay data
Publication date: November 2016 Source:Biological Control, Volume 102 Author(s): Nicholas J. Mills, Elizabeth H. Beers, Peter W. Shearer, Thomas R. Unruh, Kaushalya G. Amarasekare Pesticides are commonly used for pest management in apple, pear and walnut orchards in the western U.S. and may disrupt biological control of secondary pests in these crops. A comparative analysis was made of results obtained from a series of laboratory bioassays of acute mortality and life table response experiments to estimate lethal and sublethal effects of eight pesticides on seven natural enemy species through use of stage-structured popula...
Source: Biological Control - October 15, 2016 Category: Biology Source Type: research

Microbiological characterization for a new wild strain of Paenibacillus polymyxa with antifungal activity against Botrytis cinerea
Publication date: Available online 11 October 2016 Source:Biological Control Author(s): Roberto Santiago, César Huiliñir, Luis Cottet, Antonio Castillo A new bacterial strain with powerful antifungal activity against the phytopathogenic fungus Botrytis cinerea was characterized and identified as Paenibacillus polymyxa SCHC33. The kinetics of bacterial growth was fitted to the Monod model, with μmax = 0.218 h-1, Ks = 0.087 g/L, and YX/S = 0.159 g dry biomass/g glucose. The antifungal activity of the bacterium was detected in vitro as inhibition halos in antagonism bioassays against B. cinerea, and such act...
Source: Biological Control - October 12, 2016 Category: Biology Source Type: research

Naturally occurring phytopathogens enhance biological control of water hyacinth (Eichhornia crassipes) by Megamelus scutellaris (Hemiptera: Delphacidae), even in eutrophic water
Publication date: Available online 12 October 2016 Source:Biological Control Author(s): G.F. Sutton, S.G. Compton, J.A. Coetzee Insect biological control agents directly damage target weeds by removal of plant biomass, but herbivorous insects have both direct and indirect impacts on their host plants and can also facilitate pathogen infection. Megamelus scutellaris Berg (Hemiptera: Delphacidae) was recently released into South Africa to help control invasive water hyacinth (Eichhornia crassipes, Pontederiaceae). We compared the impact of fungicide surface-sterilised and unsterilised M. scutellaris individuals and water hy...
Source: Biological Control - October 12, 2016 Category: Biology Source Type: research

Mycorrhiza consortia suppress the fusarium root rot (Fusarium solani f. sp. Phaseoli) in common bean (Phaseolus vulgaris L.)
Publication date: Available online 3 October 2016 Source:Biological Control Author(s): Pierre Eke, Gael Chatue Chatue, Louise Nana Wakam, Rufin Marie Toghueo Kouipou, Patrick Valère Tsouh Fokou, Fabrice Fekam Boyom The ability of Arbuscular Mycorrhizal Fungi (AMF) to alleviate the lethal effects incited by root pathogens in a range of plant hosts has been demonstrated. Accumulated evidence also shows that multiple rather than single AMF species exhibit greater potential against pathogens and could mimic natural systems. Nevertheless, it is well established that the effectiveness of a consortium of beneficial organi...
Source: Biological Control - October 4, 2016 Category: Biology Source Type: research

Pseudomonas fluorescens Strains Selectively Suppress Annual Bluegrass (Poa annua L.)
Publication date: Available online 28 September 2016 Source:Biological Control Author(s): Ann C. Kennedy Annual bluegrass (Poa annua L., ABG) is a cool-season annual grass that is a major weed species in turf, turfgrass-seed and sod production, and golf courses of the western United States. The life cycles of ABG and TG are very similar, but ABG is typically more competitive. Because these plants are so similar, selective control using conventional methods is limited. Pseudomonas fluorescens biovar B strain XJ3, biovar B strain XS18, and biovar A strain LRS12 are naturally-occurring soil bacteria that suppress ABG growth....
Source: Biological Control - September 29, 2016 Category: Biology Source Type: research

Geographic origins and post-introduction hybridization between strains of Trioxys pallidus introduced to western North America for the biological control of walnut and filbert aphids.
Publication date: Available online 27 September 2016 Source:Biological Control Author(s): Jeremy C Andersen, Nicholas J Mills Strains of the exotic parasitoid wasp Trioxys pallidus were introduced on multiple occasions to the western United States resulting in successful classical biological control of aphids in walnut and filbert orchard systems. However, breakdowns in biological control services have been reported in recent years in both orchard systems. To aid in potential plans to stabilize these important biological control programs we investigated the individual origins of each strain that was introduced to and esta...
Source: Biological Control - September 28, 2016 Category: Biology Source Type: research

The interplay among Allee effects, omnivory and inundative releases in a pest biological control model
Publication date: Available online 26 September 2016 Source:Biological Control Author(s): Lucas dos Anjos, Michel Iskin da S. Costa Failures of biological control strategies are attributed, among varied explanations, to the action of Allee effects on the agent and the evidence that these released enemies not only interact with the target pest, but also with other native species of the local ecosystem. By means of a theoretical omnivory dynamical model we show that these explanations are qualitatively coherent with the results of the proposed theoretical omnivory dynamical model and that pest eradication or suppression is ...
Source: Biological Control - September 27, 2016 Category: Biology Source Type: research

Ground beetle acquisition of Cry1Ab from plant- and residue-based food webs
In this study, we examined how live Bt maize and Bt maize residue affect acquisition of Cry1Ab in six species. Adult beetles were collected live from fields with either current-year Bt maize, one-year-old Bt maize residue, two-year-old Bt maize residue, or fields without any Bt crops or residue for the past two years, and specimens were analyzed using ELISA. Observed Cry1Ab concentrations in the beetles were similar to that reported in previously published studies. Only one specimen of Cyclotrachelus iowensis acquired Cry1Ab from two-year-old maize residue. Three species acquired Cry1Ab from fields with either live plants ...
Source: Biological Control - September 23, 2016 Category: Biology Source Type: research

Effect of seed treatment duration on growth and colonization of Vicia faba by endophytic Beauveria bassiana and Metarhizium brunneum
Publication date: Available online 15 September 2016 Source:Biological Control Author(s): Lara R. Jaber, Juerg Enkerli The effect of increased duration of seed treatment with two fungal entomopathogens, Beauveria bassiana (NATURALIS) and Metarhizium brunneum (BIPESCO5), on the growth and colonization of broad bean (Vicia faba) was assessed in two replicate greenhouse experiments. The plants were inoculated by soaking seeds in a concentration of 1 x 107 conidia ml-1 of each of the two fungal strains or in sterile distilled water containing 0.1% Tween 80 for 2, 8, and 16 h. Percent seed germination and seedling emergence as...
Source: Biological Control - September 16, 2016 Category: Biology Source Type: research

Seasonal abundance and development of the Asian longhorned beetle and natural enemy prevalence in different forest types in China
Publication date: December 2016 Source:Biological Control, Volume 103 Author(s): Houping Liu, Leah S. Bauer, Tonghai Zhao, Ruitong Gao, Therese M. Poland Seasonal abundance and population development of the Asian longhorned beetle (ALB), Anoplophora glabripennis (Motschulsky) (Coleoptera: Cerambycidae), and prevalence of its natural enemies were studied on Hankow willow (Salix matsudana Koidz.) at an urban forest site (Anci) and a rural forest site (Tangerli) in Hebei province in northern China from June to October, 2002. Overall, ALB abundance was significantly lower in the urban forest in Anci than in the rural forest i...
Source: Biological Control - September 16, 2016 Category: Biology Source Type: research

Cellular signaling in cross protection: an alternative to improve mycopesticides
Publication date: Available online 14 September 2016 Source:Biological Control Author(s): F. Miranda-Hernández, P.M. Garza-López, O. Loera The use of chemical pesticides have damaged the environment and human health over the past 50 years. Biotechnological alternatives include genetically modified plants such as Bt cultures and recently those based on RNAi and CRISPR-Cas9, although resistance may appear in some insects, and also there are restrictions due to legal regulations. Microbial biopesticides based on conidia from entomopathogenic fungi are an excellent choice to face the present situation. In additi...
Source: Biological Control - September 15, 2016 Category: Biology Source Type: research

Factors affecting abundance and species composition of generalist predators (Tetragnatha spiders) in agricultural ditches adjacent to rice paddy fields
Publication date: December 2016 Source:Biological Control, Volume 103 Author(s): Yuki G. Baba, Koichi Tanaka Agricultural ditches adjacent to paddy fields are expected to provide an alternative habitat to the fields for Tetragnatha spiders, a major component of the natural enemies of crop pests in rice paddy ecosystems. To better understand the spatial distribution of these spiders in agroecosystems, it is essential to evaluate their abundance and species composition in such alternative habitats. Here, we examined the factors determining abundance and species composition of Tetragnatha spiders in agricultural ditches arou...
Source: Biological Control - September 14, 2016 Category: Biology Source Type: research

Phenotypic and molecular characterization of chrysanthemum white rust pathogen Puccinia horiana (Henn) and the effect of liquid based formulation of Bacillus spp. for the management of chrysanthemum white rust under protected cultivation
Publication date: Available online 13 September 2016 Source:Biological Control Author(s): R. Dheepa, S. Vinodkumar, P. Renukadevi, S. Nakkeeran Chrysanthemum varieties were surveyed for the incidence of white rust caused by P. horiana (Henn) in Salem and Nilgiris provinces in Tamil Nadu, India during 2013 - 2014. Among the different varieties, the variety saffin pink was highly susceptible to chrysanthemum white rust (CWR) with incidence ranging between 62.72% and 65.81%. Symptoms were visible 7 to 10 days after initial infection followed by the production of telia. Symptoms of CWR were characterized with the presence of ...
Source: Biological Control - September 13, 2016 Category: Biology Source Type: research

Competition between biological control fungi and fungal symbionts of ambrosia beetles Xylosandrus crassiusculus and X. germanus (Coleoptera: Curculionidae): mycelial interactions and impact on beetle brood production
Publication date: Available online 7 September 2016 Source:Biological Control Author(s): Louela A. Castrillo, Michael H. Griggs, John D. Vandenberg Ambrosia beetles Xylosandrus crassiusculus and X. germanus are among the most important exotic pests of orchards and nurseries in the US and are difficult to control using conventional insecticides because of their cryptic habits. The use of biological control agents may prove effective by targeting both beetles and fungal symbionts inside tree galleries: entomopathogenic fungi could be used to target beetle foundresses and their brood, or mycoparasitic fungi, e.g., Trichoderm...
Source: Biological Control - September 7, 2016 Category: Biology Source Type: research

Impact of acquired entomopathogenic fungi on adult Drosophila suzukii survival and fecundity
Publication date: Available online 3 September 2016 Source:Biological Control Author(s): Joan Cossentine, Mairi Robertson, Rose Buitenhuis Exposure of Drosophila suzukii adults to surfaces treated with Metarhizium brunneum, Beauveria bassiana, Isaria fumosorosea or Lecanicillium lecanii conidia under laboratory conditions resulted in fly infection and dose dependent mortality. Scanning electron microscopy confirmed that conidia accumulated on D. suzukii pretarsi after ⩽48 h exposure to the dried conidia treated surfaces. Approximately 50% of the flies died post exposure to 1 x 108 conidia of each isolate distributed ove...
Source: Biological Control - September 3, 2016 Category: Biology Source Type: research

Factors affecting abundance and species composition ofgeneralist predators (Tetragnathaspiders)in agricultural ditches adjacent to rice paddy fields
Publication date: Available online 3 September 2016 Source:Biological Control Author(s): Yuki G. Baba, Koichi Tanaka Agricultural ditches adjacent to paddy fields are expected to provide an alternative habitat to the fields for Tetragnatha spiders, a major component of the natural enemies of crop pests in rice paddy ecosystems. To better understand the spatial distribution of these spiders in agroecosystems, it is essential to evaluate their abundance and species composition in such alternative habitats. Here, we examined the factors determining abundance and species composition of Tetragnatha spiders in agricultural ditc...
Source: Biological Control - September 3, 2016 Category: Biology Source Type: research

Efficacy of Beauveria bassiana formulations against the fungus gnat Lycoriella ingenua
Publication date: Available online 3 September 2016 Source:Biological Control Author(s): Stefanos S. Andreadis, Kevin R. Cloonan, Giovani S. Bellicanta, Kimberly Paley, John Pecchia, Nina E. Jenkins Lycoriella ingenua Dufour (Diptera: Sciaridae) is a major pest species in commerical mushroom (Agaricus bisporus) production throughout the world. Grower demand for alternative control measures, following the recent withdrawal of a number of chemical control options, led to a label extension for use of the fungal biopesticide BotaniGard[®] ES, for control of mushroom flies. Semi-field trials were conducted to evaluate the ...
Source: Biological Control - September 3, 2016 Category: Biology Source Type: research

Root environment is a key determinant of fungal entomopathogen endophytism following seed treatment in the common bean, Phaseolus vulgaris
We examined the potential of the fungal entomopathogens Beauveria bassiana and Metarhizium anisopliae applied as seed treatments for their endophytic establishment in the common bean. Endophytic colonization in sterile sand:peat averaged ca. 40% higher for fungus treatments and ca. six times higher for volunteer fungi (other fungal endophytes naturally occurring in our samples), relative to sterile vermiculite. Colonization by B. bassiana and M. anisopliae was least variable in sterile vermiculite and most variable in sterile soil:sand:peat. The impact of soil sterilization on endophytic colonization was assessed in a sepa...
Source: Biological Control - September 3, 2016 Category: Biology Source Type: research

Phialomyces macrosporus decreases anthracnose severity on coffee seedlings by competition for nutrients and induced resistance
Publication date: Available online 26 August 2016 Source:Biological Control Author(s): Gabriel Alfonso Alvarez Rodríguez, Mario Sobral de Abreu, Felipe Augusto Moretti Fereira Pinto, Ana Cristina Andrade Monteiro, Ándres Mauricio Pinzón Núñez, Mario Lucio Vilela de Resende, Jorge Teodoro de Souza, Flavio Henrique Vasconcelos de Medeiros Colletotrichum gloeosporioides is a phytopathogenic fungus that gradually weakens both coffee seedlings and adult plants and reduce the quality of the berries. There are no commercial products in the market to control this disease, and therefore, the pros...
Source: Biological Control - August 26, 2016 Category: Biology Source Type: research

Retrospective risk assessment reveals likelihood of potential non-target attack and parasitism by Cotesia urabae (Hymenoptera: Braconidae): a comparison between laboratory and field-cage testing results
Publication date: Available online 24 August 2016 Source:Biological Control Author(s): G.A. Avila, T.M. Withers, G.I. Holwell We conducted retrospective non-target risk assessment with the larval endoparasitoid Cotesia urabae (Hymenoptera: Braconidae), via sequential no-choice tests, to assess the potential risk posed to two New Zealand endemic species: the magpie moth, Nyctemera annulata (Lepidoptera: Erebidae), and the common forest looper Pseudocoremia suavis (Lepidoptera: Geometridae), as well as to the beneficial biological control agent, the cinnabar moth Tyria jacobaeae (Lepidoptera: Erebidae). Under no-choice labo...
Source: Biological Control - August 24, 2016 Category: Biology Source Type: research

Mortality and nematode production in Spodoptera littoralis larvae in relation to dual infection with Steinernema riobrave, Heterorhabditis bacteriophora, and Beauveria bassiana, and the host plant
Publication date: Available online 10 August 2016 Source:Biological Control Author(s): El-Sayed H. Shaurub, Naglaa F. Reyad, Horia A. Abdel-Wahab, Safia H. Ahmed The present study aimed to evaluate the interactive applications of the promising biocontrol agents, the entomopathogenic nematodes (EPNs) Steinernema riobrave and Heterorhabditis bacteriophora and the entomopathogenic fungus (EPF) Beauveria bassiana, each at the LC25 level, to the last instars of the Egyptian cotton leafworm, Spodoptera littoralis, in either sequential or simultaneous fashion to determine whether interactions (synergistic, additive, or antagonis...
Source: Biological Control - August 10, 2016 Category: Biology Source Type: research

Insights into the distinct cooperation between the transcription factor Clp and LeDSF signaling in the regulation of antifungal factors in Lysobacter enzymogenes OH11
Publication date: Available online 8 August 2016 Source:Biological Control Author(s): Gaoge Xu, Xiaofeng Shi, Ruping Wang, Huiyong Xu, Liangcheng Du, Shan-Ho Chou, Hongxia Liu, Youzhou Liu, Guoliang Qian, Fengquan Liu The DSF (Diffusible Signal Factor) signaling and transcription factor Clp play key roles in regulating a diverse range of physiology in the phytopathogen Xanthomonas campestris pv. campestris. However, their functional relationship in other bacteria is little addressed. Here, we presented evidences to show that there are distinct differences in signaling connection between the Clp and LeDSF pathways in Lysob...
Source: Biological Control - August 9, 2016 Category: Biology Source Type: research

Mycorrhizal Composition can Predict Foliar Pathogen Colonization in Soybean
Publication date: Available online 6 August 2016 Source:Biological Control Author(s): Rondy J. Malik, Megan H. Dixon, James D. Bever Background and Aims Arbuscular mycorrhizal (AM) fungi may contribute to plant protection against pathogens. However, AM-fungal bioprotection may depend upon AM-fungal species identity and plant-pathosystem. Here, the aim is to determine if AM-fungal composition can alter Pseudomonas syringae pv. glycinia’s (Psg) effect on soybean (Glycine max). Two experiments were performed simultaneously. The first experiment assessed the effect of soil treatment on pathogen (Psg) growth. While the s...
Source: Biological Control - August 7, 2016 Category: Biology Source Type: research

Early detection and identification of larval parasitoids in Lobesia botrana using PCR-RFLP method
This study revealed that the PCR-RFLP analysis is therefore an appropriate and reliable tool for estimating the biological control potential of a diverse community of parasitoids on the main tortricid moth of grapevine. Graphical abstract (Source: Biological Control)
Source: Biological Control - August 7, 2016 Category: Biology Source Type: research

Augmentative releases of Diachasmimorpha longicaudata (Hymenoptera: Braconidae) for Ceratitis capitata (Diptera: Tephritidae) control in a fruit-growing region of Argentina
Publication date: Available online 3 August 2016 Source:Biological Control Author(s): Guillermo Sánchez, Fernando Murúa, Lorena Suárez, Guido Van Nieuwenhove, Gustavo Taret, Valeria Pantano, Mariana Bilbao, Pablo Schliserman, Sergio M. Ovruski Field-open augmentative releases were conducted to assess the efficacy of Diachasmimorpha longicaudata (Ashmead) for the regulation of Ceratitis capitata (Weidemann) infesting Ficus carica (L.) in a commercial area located in a fruit-producing irrigated-valley of San Juan, central-western Argentina. Parasitoids were reared on Sensitive Lethal TemperatureVienna-8...
Source: Biological Control - August 4, 2016 Category: Biology Source Type: research

Differences in the reproductive biology and diapause of two congeneric species of egg parasitoids (Hymenoptera: Encyrtidae) from northeast Asia: implications for biological control of the invasive emerald ash borer (Coleoptera: Buprestidae)
Publication date: Available online 3 August 2016 Source:Biological Control Author(s): Kristi M. Larson, Jian J. Duan The emerald ash borer Agrilus planipennis (Coleoptera: Buprestidae) is a serious invasive pest that has killed millions of North American ash (Fraxinus spp.) trees in the United States and Canada since its first detection in 2002. Oobius primorskyensis Yao and Duan and Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae) constitute a cryptic species complex of egg parasitoids attacking A. planipennis in their native range of northeast Asia. While O. primorskyensis is currently being evaluated in quaranti...
Source: Biological Control - August 4, 2016 Category: Biology Source Type: research

Performance of Sirex noctilio ’s biocontrol agent Deladenus siricidicola, in known and predicted hosts
Publication date: Available online 4 August 2016 Source:Biological Control Author(s): Helen F. Nahrung, Michael Ramsden, R. Andrew Hayes, Lesley P. Francis, Manon W. Griffiths Survival of the free-living mycetophagous form of Deladenus siricidicola, the major biological control agent of Sirex woodwasp, Sirex noctilio, was tested in known (Pinus taeda) and predicted novel (P. elliottii subsp. elliottii x P. caribaea var. hondurensis) hybrid host taxa. Trials were established in the field to simulate nematode dispersal both naturally by infected wasps and following commercial inoculation, as well as in the laboratory under ...
Source: Biological Control - August 4, 2016 Category: Biology Source Type: research

Biocontrol of postharvest green mold of oranges by Hanseniaspora uvarum Y3 in combination with phosphatidylcholine
Publication date: Available online 30 July 2016 Source:Biological Control Author(s): Wanhai Li, Hongyin Zhang, Pengxia Li, Apaliya Maurice Tibiru, Qiya Yang, Yaping Peng, Xiaoyun Zhang The effect of phosphatidylcholine (soybean extract) on the biocontrol efficacy of the antagonistic yeast Hanseniaspora uvarum Y3 against green mold of oranges was investigated. The results showed that H. uvarum Y3 significantly inhibited green mold of oranges at different concentrations compared with the control. Besides, phosphatidylcholine was observed to enhanced the biocontrol efficacy of H. uvarum Y3. Among the different concen...
Source: Biological Control - July 30, 2016 Category: Biology Source Type: research

Bacterial endophytes as potential biocontrol agents of vascular wilt diseases – review and future prospects
Publication date: Available online 28 July 2016 Source:Biological Control Author(s): Kaouthar Eljounaidi, Seung Kyu Lee, Hanhong Bae Vascular wilts are devastating plant diseases that can affect both annual crops as well as woody perennials, hence inducing major food losses and damaging valuable natural ecosystems. Because of ecological and economical reasons, the management of vascular wilt diseases by conventional chemical methods is raising concerns. More environmentally friendly alternatives such as the use of microbial antagonists to control phytopathogens are now of growing interest. The fact that bacterial endo...
Source: Biological Control - July 29, 2016 Category: Biology Source Type: research

Evaluation of the effectiveness of potential biocontrol yeasts against black sur rot and ochratoxin A occurring under commercial greenhouse grape production conditions
Publication date: Available online 28 July 2016 Source:Biological Control Author(s): M.L. Ponsone, M.C. Nally, M.L. Chiotta, M. Combina, J. Köhl, S.N. Chulze The efficacy of two strains of Kluyveromyces thermotolerans in preventing the growth and ochratoxin A (OTA) accumulation of ochratoxigenic fungi under greenhouse and field conditions were evaluated during three consecutive year trial. The data from this study showed that both yeast strains were able to control Aspergillus section Nigri species growth and ochratoxin A accumulation in wine grapes at harvest stage. The inhibitory effects were dependent on th...
Source: Biological Control - July 29, 2016 Category: Biology Source Type: research

Effects of Serratia nematodiphila CT-78 on rice bacterial leaf blight caused by Xanthomonas oryzae pv. oryzae
This study aims at isolating and identifying antagonistic soil bacteria to be used for biological control of this disease. Among the 830 bacterial isolates collected from rice fields in the Mekong Delta of Vietnam, CT-66, CT-78 and CT-88 from Can Tho city exhibited strong antagonistic effects against the pathogen. Their effects involved antibiosis (CT-66, CT-78 and CT-88) and siderophore production (CT-78). Seed soaking applications of the three isolates did not result in any observable adverse effects on rice seed germination and development. Under greenhouse conditions where rice plants were artificially inoculated at 45...
Source: Biological Control - July 28, 2016 Category: Biology Source Type: research

Biological Control of Sentinel Egg Masses of the Exotic Invasive Stink Bug Halyomorpha halys (St ål) in Mid-Atlantic USA Ornamental Landscapes
This study evaluated the effect of natural enemies on eggs of the exotic invasive brown marmorated stink bug Halyomorpha halys (Stål) in experimental plots comprising species pairs of 16 ornamental trees and shrub genera from either Eurasia or North America and in wooded areas adjacent to the plots. Sentinel egg masses were placed on leaves of Acer, Cercis, Hydrangea, and Prunus in the plots and in seven genera of trees and shrubs in adjacent woods. Overall, rates of parasitism and predation in experimental plots were low, accounting for only 3.6 % and 4.5% of egg mortality, respectively. There were no significant di...
Source: Biological Control - July 28, 2016 Category: Biology Source Type: research

Non-crop plant communities conserve spider populations in chili pepper agroecosystems
This study revealed associations between native plants and spider communities, and how these help to conserve predator biodiversity. Targeted management of native non-crop plants promote the abundance of natural enemies and enhances biological control in chili pepper agroecosystems. Graphical abstract (Source: Biological Control)
Source: Biological Control - July 27, 2016 Category: Biology Source Type: research

An assessment system for screening effective bacteria as biological control agents against Magnaporthy grisea on rice
In this study, to effectively screen potential BCAs against M.grisea from those substrates, an assessment system was established to screen the biological control potential from 935 bacterial isolates according to amplified ribosomal DNA restriction analysis (ARDRA), BOX-PCR analysis, in vitro activities of their extracellular metabolites (chitinase, cellulase, glucanase, protease, and siderophores) and in vivo biological control activity under greenhouse conditions. The conventional correlation coefficient was 0.87 between the biocontrol efficacy of the selected 30 isolates at 45 days post pathogen inoculation (dpi) and th...
Source: Biological Control - July 26, 2016 Category: Biology Source Type: research

Native Pseudomonas spp. suppressed the root-knot nematode in in vitro and in vivo, and promoted the nodulation and grain yield in the field grown mungbean
Publication date: October 2016 Source:Biological Control, Volume 101 Author(s): Mujeebur Rahman Khan, Fayaz A. Mohidin, Uzma Khan, Faheem Ahamad The study describes the effects of Pseudomonas aeruginosa, Pseudomonas fluorescens, Pseudomonas stutzeri and Pseudomonas striata on root nodulation (Bradyrhizobium sp.), root-knot disease (Meloidogyne incognita), and on the plant growth and yield of field grown mungbean (Vigna radiata). In vitro the Pseudomonas spp. produced hydrogen cyanide (P. fluorescens), ammonia, siderophore and indole acetic acid, and solubilized phosphorus. The bacterial cells and cell free culture fi...
Source: Biological Control - July 26, 2016 Category: Biology Source Type: research

Natural enemy impact on eggs of the invasive brown marmorated stink bug, Halyomorpha halys (St ål) (Hemiptera: Pentatomidae), in organic agroecosystems: A regional assessment
Publication date: October 2016 Source:Biological Control, Volume 101 Author(s): Emily C. Ogburn, Ricardo Bessin, Christine Dieckhoff, Rachelyn Dobson, Matthew Grieshop, Kim A. Hoelmer, Clarissa Mathews, Jennifer Moore, Anne L. Nielsen, Kristin Poley, John M. Pote, Mary Rogers, Celeste Welty, James F. Walgenbach Understanding native natural enemy impacts on the invasive brown marmorated stink bug, Halyomorpha halys (Stål), offers insight into the population dynamics of this invasive pest and the potential for biological control. This two-year study offers a broad-scale assessment of mortality factors a...
Source: Biological Control - July 20, 2016 Category: Biology Source Type: research