The use of Aloe vera gel coating supplemented with Pichia guilliermondii BCC5389 for enhancement of defense-related gene expression and secondary metabolism in mandarins to prevent postharvest losses from green mold rot
Publication date: Available online 8 September 2017 Source:Biological Control Author(s): Palakrit Jiwanit, Thanawat Pitakpornpreecha, Supachai Pisuchpen, Wichitra Leelasuphakul The effect of the antagonistic yeast Pichia guilliermondii, strain BCC5389, mixed in Aloe vera gel (AG) as a coating for postharvest mandarins was investigated. It was found to elicit defense-related gene expression and enzyme activities, as well as bioactive compound accumulation in the flavedo tissues of the fruit. This was led to significantly prevent fruit decay caused by Penicillium digitatum. Substantial levels of gene transcripts associated ...
Source: Biological Control - September 8, 2017 Category: Biology Source Type: research

Antagonistic potential of a psychrotrophic fungus: Trichoderma velutinum ACR-P1
Publication date: Available online 6 September 2017 Source:Biological Control Author(s): Richa Sharma, Ankita Magotra, Ravi S. Manhas, Asha Chaubey Trichoderma is a well explored genus for plethora of bioactivities due to their cosmopolitan existence, diverse metabolomics, reproductive and competitive efficacies. Mycoparasitism and antibiotics production seems to be the probable mechanisms underlying their use as biocontrol agents. The aim of this study is to investigate the antagonistic potential of a new psychrotrophic fungus Trichoderma velutinum ACR-P1 as a promising biocontrol agent against destructive phytopathogens...
Source: Biological Control - September 7, 2017 Category: Biology Source Type: research

Physiological response of Parthenium hysterophorus to defoliation by the leaf-feeding beetle Zygogramma bicolorata
Publication date: Available online 2 September 2017 Source:Biological Control Author(s): Blair W. Cowie, Ed T.F. Witkowski, Marcus J. Byrne, Lorraine W. Strathie, Jeremy M. Goodall, Nic Venter The annual shrub, Parthenium hysterophorus L. (Asteraceae), is a severe noxious weed of global significance, having been the target of control programmes in several affected countries. Biological control efforts in South Africa have seen a total of four agents released to date, one of the most promising of which is the leaf-feeding beetle, Zygogramma bicolorata Pallister (Coleoptera: Chrysomelidae), first released in 2013. Detailed ...
Source: Biological Control - September 3, 2017 Category: Biology Source Type: research

Development of Trichoderma sp. formulations in encapsulated granules (CG) and evaluation of conidia shelf-life.
This study evaluates the development of Trichoderma sp. formulations in encapsulated granules (CG) and the continued viability of the conidia during storage. A fractional factorial design 25-1 was employed to optimize the formulation conditions using an ionic gelling method for producing encapsulated granules containing sodium alginate matrix modified with different polymers. Granules characterization by FTIR and thermogravimetric analysis showed that there was interaction between the alginate matrix and polymers used in the formulation of the encapsulated granules. Which ensured stability of formulations, keeping survival...
Source: Biological Control - September 2, 2017 Category: Biology Source Type: research

Validation of the species Xiphophorus maculatus for biological control of Aedes aegypty by comparing its larvae-eating potential with Poecilia reticulata
Publication date: Available online 1 September 2017 Source:Biological Control Author(s): Edimar Olegário de Campos Júnior, Carolina Fabiano Silva, Cleibe Rossi da Silva, Boscolli Barbosa Pereira, Evelyn Siqueira Caixeta, Márcia Beatriz Cardoso de Paula, Juliana Junqueira da Silva, Alessandro Ambrósio dos Reis, Felipe Cunha, Amaral Alves de Souza Many people are infected with dengue fever annually throughout the world, mainly in countries with tropical climate. However, to treat this and other disease, there has been an indiscriminate use of chemical insecticides in public disease control progra...
Source: Biological Control - September 2, 2017 Category: Biology Source Type: research

Study of a new biocontrol fungal agent for avocado white root rot
In this study, we buried bait twigs around avocado escape trees to recover non-pathogenic soil-borne fungi. First, we selected forty isolates: 19 were identified as R. necatrix and 21 as Entoleuca sp. The next step was to conduct pathogenicity tests on lupin and avocado plants, which showed that R. necatrix isolates were pathogenic in both types of plants, while Entoleuca sp. isolates were not. The optimal growth temperature in vitro for the Entoleuca sp. isolates was 30°C. Dianthus caryophyllus was found to be a host to this fungus, while Olea europaea, Lupinus luteus, Asparagus officinalis and Fragaria ananassa were ...
Source: Biological Control - September 2, 2017 Category: Biology Source Type: research

Mechanisms of action of three isolates of Pseudomonas fluorescens active against postharvest grey mold decay of apple during commercial storage.
Publication date: Available online 1 September 2017 Source:Biological Control Author(s): Rhiannon L. Wallace, Danielle L. Hirkala, Louise M. Nelson The antagonistic activity of three isolates of Pseudomonas fluorescens, 1-112, 2-28 and 4-6, to control Botrytis cinerea (grey mold) under commercial cold storage conditions with two varieties of apple, ‘Ambrosia’ and ‘Spartan’, and possible mechanisms involved were investigated. All three isolates of P. fluorescens significantly reduced the size of the lesion and the incidence of grey mold on ‘Ambrosia’ apples after 15 weeks in cold storage...
Source: Biological Control - September 2, 2017 Category: Biology Source Type: research

Genetic matching of invasive populations of the African tulip tree, Spathodea campanulata Beauv. (Bignoniaceae), to their native distribution: maximising the likelihood of selecting host-compatible biological control agents
Publication date: Available online 30 August 2017 Source:Biological Control Author(s): G.F. Sutton, I.D. Paterson, Q. Paynter Spathodea campanulata Beauv (Bignoniaceae) has become a highly damaging environmental and agricultural weed in the Pacific Islands. It has been targeted for biological control due to the costly and inefficient nature of physical and chemical control methods. Determining the origin of weed populations has been increasingly recognised as an important component of successful biological control programmes, and may be important for the biological control of S. campanulata due to the high degree of morph...
Source: Biological Control - August 31, 2017 Category: Biology Source Type: research

Mutagenic effects of low-energy N+ ion implantation on the propamocarb-tolerance of nematophagous fungus Lecanicillium attenuatum
In conclusion, we had succeeded in improving the propamocarb-tolerance of L. attenuatum through this low-energy N+ ion implantation-based mutagenesis system. The improved strain LA-I-R5-M1 could be potentially applied in combination with propamocarb in the field. Graphical abstract (Source: Biological Control)
Source: Biological Control - August 31, 2017 Category: Biology Source Type: research

Monitoring the efficiency of Streptomyces galilaeus strain KPS-C004 against root knot disease and the promotion of plant growth in the plant-parasitic nematode infested soils
Publication date: Available online 30 August 2017 Source:Biological Control Author(s): Pongrawee Nimnoi, Neelawan Pongsilp, Pornthip Ruanpanun Streptomyces galilaeus strain KPS-C004 obtained from the plant-parasitic nematode infested soil suppressed up to 58% of root knot disease of chili caused by Meloidogyne incognita in a greenhouse experiment. The strain promoted plant growth by increasing biomass, shoot and root length by 81%, 46% and 100%, respectively. The same trend was observed with plant nutrients, increases of nitrogen, phosphorus, potassium, calcium, magnesium and iron in chili in the treatments inoculated wit...
Source: Biological Control - August 31, 2017 Category: Biology Source Type: research

Application of an entomopathogenic fungus (Beauveria bassiana) increases potato nematodes reproduction and potato tubers damage caused by Ditylenchus destructor and D. dipsaci
Publication date: Available online 26 August 2017 Source:Biological Control Author(s): Peter Mwaura, Björn Niere, Stefan Vidal Two greenhouse experiments were conducted to investigate the influence of Beauveria bassiana inoculated in the soil together with potato tuber rot nematode (Ditylenchus destructor) and stem and bulb nematode (Ditylenchus dipsaci). Data on nematode reproduction and consequently damage caused on potato tubers by these nematodes was investigated. In both experiments, the growing medium was inoculated with B. bassiana singly or in combination with D. destructor or D. dipsaci. B. bassiana alone di...
Source: Biological Control - August 27, 2017 Category: Biology Source Type: research

Biocontrol activity of Bacillus subtilis EA-CB0015 cells and lipopeptides against postharvest fungal pathogens
In this study, nine fungal pathogens were screened for growth inhibition by Bacillus subtilis EA-CB0015 strain and its metabolites. In vitro inhibitory assays showed that B. subtilis EA-CB0015 cells and the cell free supernatant (CFS) inhibited the growth of the tested fungal pathogens with different susceptibilities. Therefore, the antifungal activities of lipopeptides Iturin A and fengycin C contained in the CFS, were tested against C. acutatum and B. cinerea. C. acutatum was more susceptible with minimal inhibitory concentrations (MIC) of 32 ppm (Iturin A) and 128 ppm (fengycin C). Fruit and flower trials confirmed that...
Source: Biological Control - August 25, 2017 Category: Biology Source Type: research

Cold acclimation reduces predation rate and reproduction but increases cold- and starvation tolerance in the predatory mite Gaeolaelaps aculeifer Canestrini
Publication date: Available online 24 August 2017 Source:Biological Control Author(s): Kim Jensen, Torsten N. Kristensen, Johannes Overgaard, Søren Toft, Jesper G. Sørensen, Martin Holmstrup Ectotherms respond to their thermal environments by physiological acclimation, which increases tolerance to thermal extremes and may increase field performance. However, acclimation often has costs, and increased performance in some traits may be associated with reduced performance in other traits due to trade-offs. We investigated effects of thermal acclimation on predation, reproduction, starvation tolerance, and locom...
Source: Biological Control - August 25, 2017 Category: Biology Source Type: research

A preliminary investigation into Aureobasidium pullulans as a potential biocontrol agent against Phytophthora infestans of tomato
This study showed that L1 and L8 strains could be considered part of a control strategy against P. infestans on tomato. (Source: Biological Control)
Source: Biological Control - August 19, 2017 Category: Biology Source Type: research

Enhanced biological control of powdery mildew in vineyards by integrating a strain of Trichoderma afroharzianum with sulphur
Publication date: Available online 18 August 2017 Source:Biological Control Author(s): Indu S. Sawant, Pallavi N. Wadkar, Shashikant B. Ghule, Yogita R. Rajguru, Varsha P. Salunkhe, Sanjay D. Sawant Identifying a superior bio-control strain is the first step in developing a successful bio-control strategy for any disease. Field trials were conducted to systematically screen six potential Trichoderma isolates for control of powdery mildew disease during 2013-2016. Treatments were applied as foliar sprays with a simple liquid formulation of Trichoderma containing 5 x 106 spores ml-1. The preliminary scale, small scale, and ...
Source: Biological Control - August 19, 2017 Category: Biology Source Type: research

Field evaluation of Trichoderma spp. as a biological control agent to prevent wood decay on Benin mahogany (Khaya grandifoliola) and rain tree (Samanea saman) in Singapore
Publication date: Available online 15 August 2017 Source:Biological Control Author(s): Daniel C. Burcham, Nelson V. Abarrientos, Wong Jia Yih, Mohamed Ismail Mohamed Ali, Fong Yok King, Francis W.M.R. Schwarze In paired field experiments, two Trichoderma sp. isolates were evaluated for their ability to separately prevent wood decay on the pruning wounds of Benin mahogany (Khaya grandifoliola) and rain tree (Samanea saman) in Singapore. For each species, 150 pruning wounds were created among 10 trees and received either a conidial suspension of the biological control agent or no treatment. At regular intervals, the ability...
Source: Biological Control - August 18, 2017 Category: Biology Source Type: research

Control of Tomato leaf curl New Delhi virus in zucchini using the predatory mite Amblyseius swirskii
Publication date: Available online 16 August 2017 Source:Biological Control Author(s): Maria del Mar Tellez, Almudena Simon, Estefania Rodriguez, Dirk Janssen The tobacco whitefly, Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae), is a serious pest of vegetables in many horticulture systems. It vectors the Tomato leaf curl New Delhi virus (ToLCNDV) which causes considerable damage in zucchini crops. Both pest and the disease are well established in field and greenhouse crops in the southeast of Spain, the largest vegetable growing area in Europe. The predatory mite Amblyseius swirskii Athias-Henriot (Arachnida: Phytose...
Source: Biological Control - August 17, 2017 Category: Biology Source Type: research

Plant richness enhances banana weevil regulation in a tropical agroecosystem by affecting a multitrophic food web
Publication date: Available online 16 August 2017 Source:Biological Control Author(s): Charlotte Poeydebat, Philippe Tixier, Luc De Lapeyre De Bellaire, Dominique Carval Field-scale plant diversification of agroecosystems is a promising way to enhance ecological pest regulation. Existing studies, however, have provided inconsistent results and have generally focused on only a few trophic groups or a few levels of plant diversification. Using field data from banana agroecosystems and structural equation modelling, we assessed (i) the effects of plant species richness (two height strata) and soil cover (% of living plant co...
Source: Biological Control - August 17, 2017 Category: Biology Source Type: research

Mortality and reduced brood production in walnut twig beetles, Pityophthorus juglandis (Coleoptera: Curculionidae), following exposure to commercial strains of entomopathogenic fungi Beauveria bassiana and Metarhizium brunneum
Publication date: Available online 8 August 2017 Source:Biological Control Author(s): Louela A. Castrillo, Albert E. Mayfield, Michael H. Griggs, Robert Camp, Bryan Mudder, Adam Taylor, John D. Vandenberg Thousand cankers disease (TCD), caused by the walnut twig beetle (WTB), Pityophthorus juglandis, and its associated fungal symbiont, Geosmithia morbida, is a disease of economic and ecological concern on eastern black walnut, Juglans nigra. Numerous attacks and gallery formation by the WTB and subsequent development of cankers caused by the fungus result in progressive crown dieback. The disease can kill affected trees i...
Source: Biological Control - August 9, 2017 Category: Biology Source Type: research

Arthropod communities of laying hen houses: an integrative pilot study toward conservation biocontrol of the Poultry Red Mite Dermanyssus gallinae
Publication date: Available online 8 August 2017 Source:Biological Control Author(s): Lise Roy, Marine El Adouzi, Maria Lourdes Moraza, Geoffrey Chiron, Etienne Villeneuve de Janti, Guénolé Le Peutrec, Olivier Bonato The poultry red mite (PRM), Dermanyssus gallinae (de Geer), is a hematophagous mite of economic importance in the poultry industry. Because PRM lives off-host in habitats potentially shared by many micropredators, biocontrol agents have potential to regulate this pest in poultry buildings. The present pilot study was conducted to obtain a first insight into predatory and parasitic arthropod comm...
Source: Biological Control - August 9, 2017 Category: Biology Source Type: research

Four Species of Lady Beetles (Coleoptera: Coccinellidae) Exhibit Limited Predation on Nezara viridula (Hemiptera: Pentatomidae) Eggs and Nymphs
The objective of this laboratory study was to examine if predation by adult and larval Coccinellidae occurred on the eggs and 1st instars of Nezara viridula (L.) (Hemiptera: Pentatomidae). We tested whether live eggs, live nymphs, or dead nymphs (recently frozen) would be fed on by Coleomegilla maculata, Harmonia axyridis, Hippodamia convergens and Olla v-nigrum (Coleoptera: Coccinellidae). Our results show that starved 4th instars and adults of all tested Coccinellidae cannot feed on N. viridula eggs. More feeding by larval lady beetles occurred on recently frozen, dead 1st instars than on live 1st instars. The exception ...
Source: Biological Control - August 5, 2017 Category: Biology Source Type: research

Negative effects of low developmental temperatures on aphid predation by Orius majusculus (Heteroptera: Anthocoridae)
Publication date: Available online 2 August 2017 Source:Biological Control Author(s): Frída Helgadóttir, Søren Toft, Lene Sigsgaard Biological control agents (BCA) are often mass reared at conditions very different from those at which they have to provide their service, especially if they are to be used under field conditions. It has been suggested that biocontrol efficiency might be enhanced by acclimating the BCA under near-field conditions for some time before release (beneficial acclimation hypothesis), and some studies (e.g. with ladybirds) have supported this idea. We reared Orius majusculus, a ...
Source: Biological Control - August 3, 2017 Category: Biology Source Type: research

Using bacterial endophytes from a New Zealand native medicinal plant for control of grapevine trunk diseases
This study was aimed at elucidating whether endophytic bacteria from mānuka with biocontrol activities can be transferred to grapevine as a heterologous host and express their bioactivity. Ten endophytic bacteria from a collection of 330 bacteria produced diffusible and volatile compound(s) that inhibited growth of six botryosphaeriaceous species. A combination of spontaneous rifampicin mutants and ERIC PCR was used to confirm endophytic colonization of the introduced antagonistic bacteria in planta. The results showed that two isolates, Pseudomonas sp. I2R21 and Pseudomonas sp. W1R33, were transferable from mānuka to gr...
Source: Biological Control - August 3, 2017 Category: Biology Source Type: research

Development of a novel bio-organic fertilizer for plant growth promotion and suppression of rhizome rot in ginger
This study highlights the application prospect of a novel bio-organic fertilizer in ginger production for both disease suppression and growth promotion. (Source: Biological Control)
Source: Biological Control - August 2, 2017 Category: Biology Source Type: research

Identification of a Pseudomonas putida as biocontrol agent for tomato bacterial wilt disease
Publication date: Available online 27 July 2017 Source:Biological Control Author(s): Dongling Sun, Tao Zhuo, Xun Hu, Xiaojing Fan, Huasong Zou A bacterial isolate, A1, was collected from the rhizosphere soil of cultivated peanuts. Based on its 16S rRNA sequence, this isolate was identified as a Pseudomonas putida strain. On minimal medium supplemented with diverse nutrient substrates, the P. putida A1 strain could use fructose and fructosan, trehalose, and inositol as sole carbon resources. The ability of these four carbon resources, as well as leaf and root exudates, to stimulate cell migration in a chemotaxis assay was ...
Source: Biological Control - July 28, 2017 Category: Biology Source Type: research

Halyomorpha halys (Heteroptera: Pentatomidae) Egg Surface Chemicals Inhibit North American Telenomus and Trissolcus (Hymenoptera: Scelionidae) Parasitism
Publication date: Available online 25 July 2017 Source:Biological Control Author(s): Roberta Tognon, Jeffrey R. Aldrich, Matthew L. Buffington, Elijah J. Talamas, Josué Sant'Ana, Frank G. Zalom Halyomorpha halys (Stål) (Heteroptera: Pentatomidae), the brown marmorated stink bug (BMSB), is an invasive pest in the U.S., where it has been largely unaffected by natural enemies. Using rinsed and unrinsed, frozen and fresh egg masses in laboratory bioassays, we studied how surface chemicals on the eggs of H. halys might suppress parasitism by the native North American scelionid parasitoids, Telenomus podisi Ashmead...
Source: Biological Control - July 26, 2017 Category: Biology Source Type: research

Inhibitory effect of Pichia membranaefaciens and Kloeckera apiculata against Monilinia fructicola and their biocontrol ability of brown rot in postharvest plum
Publication date: Available online 24 July 2017 Source:Biological Control Author(s): Jie Zhang, Jiao Xie, Yahan Zhou, Lili Deng, Shixiang Yao, Kaifang Zeng The use of antagonistic yeasts to control postharvest pathogens is a promising alternative to fungicides. The effect of the yeast antagonists Pichia membranaefaciens and Kloeckera apiculata for controlling brown rot of plums in postharvest and the antifungal activity of the two yeast strains in in vitro conditions against Monilinia fructicola were investigated. In in vivo trials, both P. membranaefaciens and K. apiculata showed a significant reduction of rot incidence ...
Source: Biological Control - July 25, 2017 Category: Biology Source Type: research

Biological control of Septoria leaf blotch and growth promotion in wheat by Paenibacillus sp. strain B2 and Curtobacterium plantarum strain EDS
Publication date: Available online 21 July 2017 Source:Biological Control Author(s): Erika Samain, Diederik van Tuinen, Philippe Jeandet, Thierry Aussenac, Sameh Selim Many of the non-pathogenic endophytic bacteria that reside in plant roots promote plant growth as well as protection against pathogens attack. However, little is known about their mode of action in wheat. We have previously demonstrated the potential of Paenibacillus sp. strain B2 (PB2) to stimulate plant defense mechanisms via its paenimyxin lipo-polypeptide elicitor. Recently, we isolated the Curtobacterium plantarum strain EDS (EDS) from seeds of almost ...
Source: Biological Control - July 22, 2017 Category: Biology Source Type: research

Long term post-release impacts of the introduced parasitoid Peristenus relictus (Hymenoptera: Braconidae) on Lygus spp. (Hemiptera: Miridae) populations in California
Publication date: Available online 21 July 2017 Source:Biological Control Author(s): Charles H. Pickett, Diego J. Nieto, Janet A. Bryer, Sean L. Swezey, Marypat Stadtherr The European Lygus spp. parasitoid Peristenus relictus (Ruthe) was released into California between 1998 and 2004. Four release sites, including one in the Central Valley and three along the Monterey Bay, were monitored from 1999 to 2015. Lygus spp. and P. relictus populations were monitored in alfalfa, weedy non-crop vegetation, and commercial strawberries. An experimental field cage study was also conducted to measure the contribution of both P. relict...
Source: Biological Control - July 22, 2017 Category: Biology Source Type: research

Diversity of nematophagous fungi in Moroccan olive nurseries: Highlighting prey-predator interactions and efficient strains against root-knot nematodes.
This study aims to isolate, identify and assess the diversity and the in vitro predatory activity of nematophagous fungi from various olive nurseries in Morocco. A total of 305 soil samples were collected in 25 nurseries in Moroccan olive-producing areas (Jbala, Guerouane, Haouz and Souss). Seventy-three pure fungal strains from nematophagous fungi were recovered from nursery substrates infested with root-knot nematodes. Diversity indices showed that fungi were more numerous in southern regions, whereas fungal communities were more numerically alike in northern regions, partly depending on the occurrence of root-knot nemat...
Source: Biological Control - July 20, 2017 Category: Biology Source Type: research

Diversity and biocontrol potential of bacterial consortia associated to root-knot nematodes
Publication date: Available online 17 July 2017 Source:Biological Control Author(s): Mariantonietta Colagiero, Laura C. Rosso, Aurelio Ciancio The bacteria associated to egg masses and second stage juveniles (J2) of root-knot nematodes (Meloidogyne spp.) were studied using three different soils from naturally infested farms in Apulia (Italy). The species were isolated and identified with 16S rRNA sequencing or characterized with metabolic profiles. They included members of genera Pseudomonas and Bacillus, together with Lysinibacillus sphaericus and an unclassified Chryseobacterium sp. To identify potential biocontrol agen...
Source: Biological Control - July 17, 2017 Category: Biology Source Type: research

Chronic effects and horizontal transmission of Metarhizium anisopliae strain QS155 infection in the sweet potato weevil, Cylas formicarius (Coleoptera: Brentidae)
In this study, the chronic effects of infection with Metarhizium anisopliae strain QS155 in adult C. formicarius were investigated. Female fecundity was significantly reduced in treatments where females were infected directly and maintained in pairs with either infected or uninfected males, and to a statistically equivalent level (51%) when initially uninfected females were caged with infected males. A significant increase in the proportion of eggs left exposed outside the host plant occurred in response to either direct or indirect maternal exposure to M. anisopliae. The hatchability of eggs fully enclosed by host plant t...
Source: Biological Control - July 17, 2017 Category: Biology Source Type: research

Metabarcoding: A powerful tool to investigate microbial communities and shape future plant protection strategies
Publication date: Available online 17 July 2017 Source:Biological Control Author(s): Ahmed Abdelfattah, Antonino Malacrinò, Michael Wisniewski, Santa O. Cacciola, Leonardo Schena Microorganisms are the main drivers shaping the functioning and equilibrium of all ecosystems, contributing to nutrient cycling, primary production, litter decomposition, and multi-trophic interactions. Knowledge about the microbial assemblies in specific ecological niches is integral to understanding the assemblages interact and function the function, and becomes essential when the microbiota intersects with human activities, such as prot...
Source: Biological Control - July 17, 2017 Category: Biology Source Type: research

Life Stage Specific Predation of Halyomorpha halys (St ål) by Generalist Predators
Publication date: Available online 15 July 2017 Source:Biological Control Author(s): John M. Pote, Anne L. Nielsen Halyomorpha halys (Stål) is an invasive pest of agriculture in the USA. Feeding damage from H. halys affects dozens of crops yet little is known about the community of predators which prey on H. halys in its invaded range. Ten taxa of predatory or omnivorous insects were evaluated for their capacity to consume eggs and nymphs of Halyomorpha halys in laboratory mesocosm experiments. Predators were collected from agricultural ecosystems in New Jersey, starved for 24-48 hours, and then exposed to H. halys ...
Source: Biological Control - July 16, 2017 Category: Biology Source Type: research

Fitness consequences of body-size-dependent parasitism in a gregarious parasitoid attacking the 7-spot ladybird, Coccinella septempunctata (Coleoptera: Coccinellidae)
Publication date: Available online 13 July 2017 Source:Biological Control Author(s): Haitian Song, Ling Meng, Baoping Li Variation in body size of hosts and their parasitoids poses a significant challenge for gregarious parasitoid females to make their decisions to optimally utilize a range of hosts. In the present study, we investigated the combined effect of host size across successive host larval stages and maternal wasp size on fitness-correlated performances of offspring parasitoids, using the larval-pupal gregarious parasitoid Oomyzus scaposus attacking the 7-spot ladybird Coccinella septempunctata. The probability ...
Source: Biological Control - July 14, 2017 Category: Biology Source Type: research

Monitoring of Trichoderma species in agricultural soil in response to application of biopreparations
In this study, strains of T. atroviride and T. harzianum, overgrown on organic material, were applied as biopreparations to the soil in open-field lettuce cultivation, and their population levels were monitored over time. A newly developed multiplex-PCR Trichoderma-identification technique was successfully used to confirm the increased abundance of T. atroviride and T. harzianum in the soil after biopreparations application, whereas these Trichoderma species were not detected in untreated soil. The results of multiplex-PCR were confirmed by standard plating and Trichoderma spp. colony counting of soil samples as well as by...
Source: Biological Control - July 12, 2017 Category: Biology Source Type: research

Can Spathius galinae attack emerald ash borer larvae feeding in large ash trees?
Publication date: Available online 8 July 2017 Source:Biological Control Author(s): Theresa C. Murphy, Roy G. Van Driesche, Juli R. Gould, Joseph S. Elkinton Agrilus planipennis, the emerald ash borer (EAB), is an invasive forest pest decimating North American ash trees. Population-wide management of EAB is focused on biological control through the introduction of four parasitic wasps, including the recently approved larval parasitoid Spathius galinae. This species was approved for release in the north-central and northeastern US in 2015 and its long ovipositor (4-5.3 mm) is expected to allow it to reach EAB larvae in lar...
Source: Biological Control - July 9, 2017 Category: Biology Source Type: research

Selection of microbes for control of Rhizoctonia root rot on wheat using a high throughput pathosystem
Publication date: Available online 6 July 2017 Source:Biological Control Author(s): Stephen Barnett, Sophia Zhao, Ross Ballard, Christopher Franco The promise of microbial biological control of soilborne fungal pathogens of crops has yet to be fully realised with only a few strains commercialised and available to growers. One bottleneck is the availability of suitable methods to screen microorganisms for disease control efficacy relevant to controlling disease in the field. A 3-phase in planta pathosystem containing field soil was developed to screen 2,310 microorganisms for control of Rhizoctonia root rot on wheat. Test ...
Source: Biological Control - July 7, 2017 Category: Biology Source Type: research

Trichoderma asperellum (NVTA2) as a potential antagonist for the management of stem rot in carnation under protected cultivation
Publication date: Available online 4 July 2017 Source:Biological Control Author(s): S Vinodkumar, T Indumathi, S Nakkeeran In the present investigative study, fifty Trichoderma spp. (Persoon) were isolated from the rhizosphere of various crop plants. Their potential, as an antagonist was assessed against S. sclerotiorum (Lib.) de Bary, causing stem rot of carnation (Dianthus caryophyllus L.). T. asperellum (NVTA2) was superior in inhibiting the growth and development of stem rot pathogen up to 53.7 per cent in vitro. Seven Trichoderma species with greatest antagonistic potential were identified up to species level through...
Source: Biological Control - July 5, 2017 Category: Biology Source Type: research

Challenges facing the biological control strategies for the management of Fusarium Head Blight of cereals caused by F. graminearum.
Publication date: Available online 30 June 2017 Source:Biological Control Author(s): Fabienne Legrand, Adeline Picot, José Francisco Cobo-Díaz, Wen Chen, Gaétan Le Floch Fusarium Head Blight (FHB) is one of the most devastating diseases in the world, threatening both crop productions by affecting kernel development, and human and animal health by contaminating heads and seeds with mycotoxins. FHB is caused mainly by a Fusarium graminearum species complex, with F. graminearum sensu stricto (lineage 7) being the most prevalently isolated species from disease kernels. Recently it has been designated as t...
Source: Biological Control - July 1, 2017 Category: Biology Source Type: research

Pantoea agglomerans SWg2 colonizes mulberry tissues, promotes disease protection and seedling growth
Publication date: Available online 28 June 2017 Source:Biological Control Author(s): Jie Xie, Ping Shu, Gary Strobel, Jie Chen, Junhong Wei, Zhonghuai Xiang, Zeyang Zhou Mulberry bacterial blight caused by Pseudomonas syringae pv. mori, is one of the most serious diseases on mulberry (Morus alba L.), and threatens sericulture development. An endophytic Pantoea agglomerans SWg2 (referred to as SWg2), originally isolated from roots of healthy mulberry, is extremely inhibitory activity to P. syringae. Greenhouse tests were first conducted to examine the biological control properties of SWg2. A suspension of SWg2, introduced ...
Source: Biological Control - June 29, 2017 Category: Biology Source Type: research

Decrease in the incidence of charcoal root rot in common bean (Phaseolus vulgaris L.) by Bacillus amyloliquefaciens B14, a strain with PGPR properties
The objective of this study was to isolate strains of the genus Bacillus from different productive soils of the province of Salta, Argentina, which have growth promoting properties in common bean (Phaseolus vulgaris L.) and have the ability to inhibit different phytopathogenic fungi, primarily Macrophomina phaseolina. Among the 105 strains of bacilli checked, Bacillus sp. B14 was selected for having the greatest in vitro inhibitory effect against Sclerotium rolfsii, Sclerotinia sclerotiurum, Rhizoctonia solani, Fusarium solani and Macrophomina phaseolina, recording fungal inhibition values that varied between 60 and 80%. I...
Source: Biological Control - June 28, 2017 Category: Biology Source Type: research

The biocontrol effect of Sporidiobolus pararoseus Y16 against postharvest diseases in table grapes caused by Aspergillus niger and the possible mechanisms involved
Publication date: Available online 27 June 2017 Source:Biological Control Author(s): Qiaofei Li, Chaolan Li, Pengxia Li, Hongyin Zhang, Xiaoyun Zhang, Xiangfeng Zheng, Qiya Yang, Maurice Tibiru Apaliya, Boateng Nana Adwoa Serwah, Yiwen Sun Fruits are vulnerable to pathogen infection caused by decay during growth and storage, which causes huge economic losses. The aim of this study was to investigate the biocontrol efficacy of the antagonistic yeast Sporidiobolus pararoseus Y16 in the control of Aspergillus niger decay, and natural decay of table grapes and the possible mechanisms involved. The results showed that S. parar...
Source: Biological Control - June 28, 2017 Category: Biology Source Type: research

Intraspecific variation in facultative symbiont infection among native and exotic pest populations: potential implications for biological control
Publication date: Available online 27 June 2017 Source:Biological Control Author(s): Nicolas Desneux, Mark K. Asplen, Cristina M. Brady, George E. Heimpel, Keith R. Hopper, Chen Luo, Lucie Monticelli, Kerry M. Oliver, Jennifer A. White Facultative bacterial symbionts can provide their host insects with protection from natural enemies. These symbionts are often found at low to intermediate frequencies among hosts in native populations, suggesting that fewer symbiont taxa (and their corresponding defensive properties) may be present in exotic populations, due to founder effects and drift in newly established populations. We...
Source: Biological Control - June 28, 2017 Category: Biology Source Type: research

Compatibility of Beauveria bassiana with fungicides in vitro and on zucchini plants infested with Trialeurodes vaporariorum
Publication date: Available online 19 June 2017 Source:Biological Control Author(s): Roberta Roberti, Hillary Righini, Antonio Masetti, Stefano Maini The effect of fungicides on the entomopathogenic fungus Beauveria bassiana strain ATCC 74040 (Naturalis®) was evaluated in vitro and in vivo. The formulated fungicides Cantus® (boscalid), Frupica (mepanipyrim), Galben (benalaxyl), Melody® Compact (iprovalicarb+Cu oxychloride), Oracle™ (fenamidone+Cu), Prosper® 300 CS (spiroxamine), Signum® (boscalid+pyraclostrobin), Switch® (cyprodinil+fludioxonil) and Talendo® (proquinazid) were tested on f...
Source: Biological Control - June 20, 2017 Category: Biology Source Type: research

Burkholderia isolates from a sand dune leaf litter display biocontrol activity against the bole rot disease of Agave sisalana
Publication date: Available online 16 June 2017 Source:Biological Control Author(s): Valter Cruz Magalhães, Leonardo de Oliveira Barbosa, Jackeline Pereira Andrade, Ana Cristina Fermino Soares, Jorge Teodoro de Souza, Phellippe Arthur Santos Marbach Sisal (Agave sisalana) is an important source of biodegradable hard fiber for diverse industrial uses. The disease known as sisal bole rot leads to plant death and is caused by black aspergilli, including Aspergillus niger, A. brasiliensis and A. tubingensis. Bole rot is among the factors responsible for the decline of sisal production in Brazil. The potential of 16 Bur...
Source: Biological Control - June 17, 2017 Category: Biology Source Type: research

Volatile molecules of Fusarium oxysporum strain 21 are retained in water and control Meloidogyne incognita
Publication date: Available online 15 June 2017 Source:Biological Control Author(s): Willian César Terra, Vicente Paulo Campos, Márcio Pozzobon Pedroso, Alisson Lucrécio da Costa, Eduardo Souza Freire, Iohana Pinto de Pinto, Júlio Carlos Pereira da Silva, Liliana Estupiñan Lopez, Thaisa Conrado Nunes Santos Dissolution in water of volatile organic compounds (VOCs) emitted by microorganisms may explain, in part, the distribution of VOCs throughout the soil, and thus the process of exposure of plant-parasitic nematodes (PPN) to these molecules. Water was exposed for short periods (0.5 to 2...
Source: Biological Control - June 16, 2017 Category: Biology Source Type: research

Genetic analysis of native and introduced populations of the aquatic weed Sagittaria platyphylla – Implications for biological control in Australia and South Africa
Publication date: September 2017 Source:Biological Control, Volume 112 Author(s): Raelene M. Kwong, Linda M. Broadhurst, Brian R. Keener, Julie A. Coetzee, Nunzio Knerr, Grant D. Martin Sagittaria platyphylla (Engelm.) J.G. Sm. (Alismataceae) is an emergent aquatic plant native to southern USA. Imported into Australia and South Africa as an ornamental and aquarium plant, the species is now a serious invader of shallow freshwater wetlands, slow-flowing rivers, irrigation channels, drains and along the margins of lakes and reservoirs. As a first step towards initiating a classical biological control program, a population ge...
Source: Biological Control - June 16, 2017 Category: Biology Source Type: research

Comparative life history traits of indigenous Italian parasitoids of Drosophila suzukii and their effectiveness at different temperatures
This study aims to provide a range of baseline information on the developmental parameters and parasitisation efficacy of three Italian populations of D. suzukii parasitoids at different temperatures. The species tested were a larval parasitoid, Leptopilina heterotoma (Thomson), and two pupal parasitoids, Pachycrepoideus vindemiae (Rondani) and Trichopria drosophilae (Perkins). Two comparative experiments were set up: the first assessing longevity and the lifetime fecundity of each species at 23°C, and the second investigating the effect of temperature on parasitisation efficacy, developmental time and sex-ratio. The r...
Source: Biological Control - June 14, 2017 Category: Biology Source Type: research

Genetic analysis of native and introduced populations of the aquatic weed Sagittaria platyphylla - implications for biological control in Australia and South Africa
Publication date: Available online 8 June 2017 Source:Biological Control Author(s): Raelene M. Kwong, Linda M. Broadhurst, Brian R. Keener, Julie A. Coetzee, Nunzio Knerr, Grant D. Martin Sagittaria platyphylla (Engelm.) J.G. Sm. (Alismataceae) is an emergent aquatic plant native to southern USA. Imported into Australia and South Africa as an ornamental and aquarium plant, the species is now a serious invader of shallow freshwater wetlands, slow-flowing rivers, irrigation channels, drains and along the margins of lakes and reservoirs. As a first step towards initiating a classical biological control program, a population ...
Source: Biological Control - June 8, 2017 Category: Biology Source Type: research