Efficacy of P. oligandrum affected by its association with bacterial BCAs and rootstock effect in controlling grapevine trunk diseases
Publication date: Available online 31 January 2018 Source:Biological Control Author(s): L. Daraignes, J. Gerbore, A. Yacoub, L. Dubois, C. Romand, O. Zekri, J. Roudet, P. Chambon, M. Fermaud The development of biological control agents (BCAs) is a promising and environmentally friendly method to control plant pathogens. In a grapevine nursery greenhouse and for the first time on grafted cuttings (scion cv. Cabernet sauvignon), this two-year study demonstrated the significant efficacy of the oomycete Pythium oligandrum as a BCA against two major aggressive fungal pathogens, Neofusicoccum parvum and Phaeomoniella chlamydosp...
Source: Biological Control - February 1, 2018 Category: Biology Source Type: research

Screening of endofungal bacteria isolated from wild growing mushrooms as potential biological control agents against brown blotch and internal stipe necrosis diseases of Agaricus bisporus
Publication date: April 2018 Source:Biological Control, Volume 119 Author(s): Mohammad Ali Aslani, Behrouz Harighi, Jafar Abdollahzadeh Brown blotch and internal stipe necrosis caused by Pseudomonas tolaasii and Ewingella americana, respectively are two important diseases of cultivated mushroom. The aim of the present study was to evaluate antagonistic activity of endofungal bacteria isolated from wild growing mushrooms against Pseudomonas tolaasii and Ewingella americana. Both pathogens were isolated from infected cultivable button mushrooms and characterized by phylogenetic analysis. A total of sixty-six endofungal bact...
Source: Biological Control - January 25, 2018 Category: Biology Source Type: research

Estimating parasitoid impact on aphid populations in the field
Publication date: Available online 10 January 2018 Source:Biological Control Author(s): Alexandre Leblanc, Jacques Brodeur We developed a quantitative method to assess the capacity of parasitoids to reduce aphid populations in open fields. The method, designated as the propagated mortality analysis (PMA), estimates the impact of early parasitoid-induced mortality on forthcoming aphid populations and was built upon an existing model describing the bell-shaped population dynamics observed in many aphid species. The PMA was next used to assess the impact of the naturalized and most abundant parasitoid Aphelinus sp. on popula...
Source: Biological Control - January 14, 2018 Category: Biology Source Type: research

Effect of Trichoderma Spp. And Purpureocillium Lilacinum on Meloidogyne Javanica in Commercial Pineapple Production in Kenya
Publication date: Available online 12 January 2018 Source:Biological Control Author(s): Agnes W. Kiriga, Solveig Haukeland, George M. Kariuki, Danny L. Coyne, Nikolai V. Beek Plant-parasitic nematodes, in particular Meloidogyne species, cause significant yield reduction in commercial pineapple, Ananas comosus, worldwide. The efficacy of three Trichoderma isolates (Trichoderma asperellum M2RT4, T. atroviride F5S21, Trichoderma sp. MK4) and two isolates of Purpureocillium lilacinum (KLF2and MR2) were evaluated against Meloidogyne javanica, using rooted pineapple crowns in a pot experiment under greenhouse conditions. All th...
Source: Biological Control - January 14, 2018 Category: Biology Source Type: research

Suppression of root-knot disease in Pogostemon cablin caused by Meloidogyne incognita in a rhizobacteria mediated activation of phenylpropanoid pathway
In this study the isolated Pseudomonas putida strain, BG2 (KU312064.1) and Bacillus cereus BC1 (KX762284), promoted growth as well as provided resistance to Meloidogyne incognita infection. From the gene expression analysis it was found that both the strains activated phenylpropanoid pathway through - overproduction of Phenylalanine ammonia lyase (PAL) enzyme. Further, the BG2 strain also activates the chalcone synthase enzyme leading to the synthesis of flavonoids, which are known to possess nematicidal activity. We finally concluded that the BG2 and BC1 strains can be a potential biocontrol agent to deal with root-knot d...
Source: Biological Control - January 8, 2018 Category: Biology Source Type: research

Isolation and Identification of Bacteria from Rhizosphere Soil and Their Effect on Plant Growth Promotion and Root-knot Nematode Disease
In this study, 860 strains of bacteria were collected from rhizosphere soil and five bacteria isolates were identified with high efficacy against RKNs: Bacillus cereus (Sneb 560), B. subtilis (Sneb 815), Pseudomonas putida (Sneb 821), P. fluorescens (Sneb 825) and Serratia proteamaculans (Sneb 851). The five bacteria isolates had high larvicidal and ovicidal activity in vitro. In a novel result, Sneb 851 showed especially high potential as a biocontrol agent against Meloidogyne incognita, causing 99.17% juvenile mortality and 61.11% egg mortality. In the pot experiment, tomato seeds treated with Sneb 825 displayed signific...
Source: Biological Control - January 8, 2018 Category: Biology Source Type: research

The performance of Dactylopius opuntiae as a biological control agent on two invasive Opuntia cactus species in South Africa
Publication date: Available online 6 January 2018 Source:Biological Control Author(s): Nicola Frances Rule, John Hoffmann Many biological control projects targeting weeds in the Cactaceae have been noteworthy successes. Recently, populations of a prickly pear, Opuntia humifusa, have spread across South Africa, endangering both grazing lands and natural biodiversity. A biotype of the cochineal insect, Dactylopius opuntiae ‘stricta’, which has been successfully used in South Africa to control Opuntia stricta, has been observed to use O. humifusa as a host. However, it does not appear to effectively control O. hu...
Source: Biological Control - January 6, 2018 Category: Biology Source Type: research

Granulobasidium vellereum (Ellis & amp;Cragin) J ülich, a promising biological control agent
In this study we evaluated the potential activity of G. vellereum against wood decay fungi and fungi associated with the ambrosia beetle Megaplatypus mutatus Chapuis, an important forest pest in Populus sp. A combination of in vitro assays was made, in cultures and on wood blocks. Granulobasidium vellereum’s Volatile Organic Compounds (FVOCs) were characterized and their potential role in biocontrol was assessed. Granulobasidium vellereum did not cause a significant loss of weight on P. acerifolia and Populus wood and inhibited the growth of the target fungi, mainly when inoculated first. Up to nineteen volatile comp...
Source: Biological Control - December 26, 2017 Category: Biology Source Type: research

Predators and alate immigration influence the season-long dynamics of soybean aphid (Hemiptera: Aphididae)
Publication date: February 2018 Source:Biological Control, Volume 117 Author(s): J.A. Bannerman, B.P. McCornack, D.W. Ragsdale, N. Koper, A.C. Costamagna The identification of key species within multi-predator assemblages suppressing agricultural pests is paramount to the incorporation of predators into pest management plans. Generalist predators have strong impacts on population growth of soybean aphids (Aphis glycines, Hemiptera: Aphididae) in North America, but their relative influence may vary seasonally, and potentially interact with immigration of alate aphids following initial field colonization. Here we present th...
Source: Biological Control - December 26, 2017 Category: Biology Source Type: research

Pathogenicity of indigenous entomopathogenic nematodes from Benin against mango fruit fly (Bactrocera dorsalis) under laboratory conditions
In this study, the susceptibility of larvae and pupae of B. dorsalis to 12 EPN isolates originating from Benin was investigated. The effect of nematode concentrations (20, 50, 100, 200 and 300 Infective Juveniles (IJs)/B. dorsalis larva) and of different substrate moisture content (10, 15, 20, 25 and 30% v/w) on B. dorsalis mortality at the larval stage was studied. Also, the reproduction potential inside B. dorsalis larvae was assessed. Our results revealed that the susceptibility of B. dorsalis larvae was significantly different among the 12 tested nematode isolates with H. taysearae isolate Azohoue2 causing the greatest...
Source: Biological Control - December 26, 2017 Category: Biology Source Type: research

Biocontrol of Fusarium verticillioides using organic amendments and their actinomycete isolates
Publication date: Available online 11 December 2017 Source:Biological Control Author(s): Phuong-Anh Nguyen, Caroline Strub, Noel Durand, Pascaline Alter, Angélique Fontana, Sabine Schorr-Galindo In a sustainable development concern, the agricultural practices notably those to control the pathogenic and/or mycotoxigenic fungi that maintain the quality and the abundance of crops with respecting the ecosystems and public health are indispensable. Our study focuses on evaluating the biocontrol potential of the actinomycete microflora of some organic amendments against the phytopathogenic and mycotoxigenic Fusarium vert...
Source: Biological Control - December 15, 2017 Category: Biology Source Type: research

Corrigendum to “Enhanced biological control of powdery mildew in vineyards by integrating a strain of Trichoderma afroharzianum with sulphur” [Biol. Control 114 (2017) 133–143]
Publication date: Available online 14 December 2017 Source:Biological Control Author(s): Indu S. Sawant, Pallavi N. Wadkar, Shashikant B. Ghule, Yogita R. Rajguru, Varsha P. Salunkhe, Sanjay D. Sawant (Source: Biological Control)
Source: Biological Control - December 15, 2017 Category: Biology Source Type: research

Interspecific competition between egg parasitoids: Native Fopius caudatus and exotic Fopius arisanus, in Ceratitis cosyra
Publication date: Available online 22 November 2017 Source:Biological Control Author(s): Miriam Frida Karlsson, Espérantos O. de Souza, Pascal M. Ayelo, Joseph Ayomidé Zannou, Gbelidji Souvenir Blaise Mègnigbèto, Aimé H. Bokonon-Ganta Tephritidae fruit flies are parasitized by Braconidae wasps, of which some are used in biological control programs. Releases of exotic parasitoids might affect, or be affected by, native species exploiting a common host. We studied interspecific competition between the native African parasitoid Fopius caudatus (Szépligeti) and the exotic Asian parasi...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

Synergistic effects of the combined application of Bacillus subtilis H158 and strobilurins for rice sheath blight control
Publication date: Available online 22 November 2017 Source:Biological Control Author(s): Lianmeng Liu, Mengqi Liang, Lu Li, Lei Sun, Yihua Xu, Jian Gao, Ling Wang, Yuxuan Hou, Shiwen Huang Rice sheath blight, a major rice disease caused by Rhizoctonia solani, has become an increasingly serious problem in modern rice production systems. Managing this disease is a challenge, and chemical control with fungicides is currently the most effective and reliable method. Here, the combined application of a recognized biological agent, Bacillus subtilis strain H158, and strobilurins was tested for the ability to control rice sheath ...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

Compatibility of endophytic fungal entomopathogens with plant extracts for the management of sweetpotato whitefly Bemesia tabaci Gennadius (Homoptera: Aleyrodidae)
Publication date: Available online 23 November 2017 Source:Biological Control Author(s): Lara R. Jaber, Salah-Eddin Araj, Jamal R. Qasem The effects of individual and combined application of endophytic fungal entomopathogens (Beauveria bassiana strain NATURALIS and Metarhizium brunneum strain BIPESCO5) and aqueous extracts of two medicinal plants (Calotropis procera and Inula viscosa) on the survival and development of the sweetpotato whitefly (Bemisia tabaci) were investigated for the first time. Brassica oleracea was inoculated through foliar spray of plants with the conidial suspension of fungal strains, and the endoph...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

Potential application of a marine-derived fungus, Talaromyces tratensis KUFA 0091 against rice diseases
The objective of this study was to evaluate antagonistic activity of Talaromyces tratensis KUFA 0091 against Alternaria padwickii (Ganguly) M.B. Ellis, Bipolaris oryzae (Breda de Haan) Shoem., Curvularia lunata (Wakk) Boedjin., and Fusarium moniliforme J. Sheld the causal agents of rice brown spot and dirty panicle. The in vitro results showed that among the tested pathogens, T. tratensis KUFA 0091 significantly (P <0.05) inhibited the radial growth of B. oryzae in dual cultures on potato dextrose agar medium by 46% and forming an inhibition zone 13–15 mm in width. The crude extract of the antagonistic fungus ...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

Molecular characterization of interspecific competition of Diachasmimorpha longicaudata (Ashmead) and Fopius arisanus (Sonan) parasitizing the oriental fruit fly, Bactrocera dorsalis (Hendel)
Publication date: Available online 27 November 2017 Source:Biological Control Author(s): Guang Hong Liang, Lie Qing Fu, Jun Xian Zheng, Hao Yu Lin, Jian Hui Lin, Sheina B. Sim, Eric B. Jang, Wade P. Heller, Scott M. Geib Diachasmimorpha longicaudata (Ashmead) and Fopius arisanus (Sonan), are two of the most abundant and widely used parasitoids for biological control of Bactrocera dorsalis (Hendel) worldwide. However, interspecific competition between them frequently occurs within a single host once they coexit in same orchard, resulting in reduction of their combined impact. However, thus far, it is difficult to character...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

Optimizing the mass production of Clonostachys rosea by liquid-state fermentation
In this study, we aimed to optimize the culture medium and to standardize parameters that may interfere with the production of C. rosea conidia in a liquid-state fermentation system. Culturing was performed in 250-mL Erlenmeyer flasks shaken for 7 days, followed by planned experimental methodology to reduce the number of analyses and consumable costs. Benchtop bioreactor tests with the optimized medium were performed. Glucose and sucrose were evaluated as carbon sources. Initially, the effects of temperature, pH, photoperiod, carbon:nitrogen ratio and water activity on inoculum production were evaluated, with the pH and ph...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

Host location and dispersal ability of the cosmopolitan parasitoid Trichopria drosophilae released to control the invasive spotted wing Drosophila
Publication date: Available online 2 December 2017 Source:Biological Control Author(s): Marco Valerio Rossi Stacconi, Nasim Amiresmaeili, Antonio Biondi, Cristiano Carli, Stefano Caruso, Maria Luisa Dindo, Santolo Francati, Angela Gottardello, Alberto Grassi, Daniela Lupi, Elisa Marchetti, Fabio Mazzetto, Nicola Mori, Tommaso Pantezzi, Luciana Tavella, Giovanna Tropea Garzia, Lorenzo Tonina, Giacomo Vaccari, Gianfranco Anfora, Claudio Ioriatti Biological control remains unutilized as yet in the framework of Drosophila suzukii Matsumura management. Although several parasitoid species attack the pest under laboratory condit...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

High intermediary mutualist density provides consistent biological control in a tripartite mutualism
We describe this interaction structure as a mutualism-dependent mutualism and ask whether the density of intermediary mutualist (scale insects, Coccus) that benefits Azteca also influences the benefits provided to coffee plants. We found that indeed Azteca’s benefit to Coffea is consistent when Coccus density is high. Furthermore, we also found that at low Coccus density Azteca only benefits Coffea in the beginning of the rainy season, and this effect is likely due to the fact that Coccus produces less sugars with higher precipitation. We suggest a framework for thinking about context-dependency in agroecosystem mutu...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

Improvement of reproductive performance of Habrobracon hebetor: Consideration of diapausing and non-diapausing larvae of Plodia interpunctella
Publication date: Available online 7 December 2017 Source:Biological Control Author(s): Warsi Sanower, George N. Mbata, Mark E. Payton The major obstacle to the adoption of Habrobracon hebetor (Say) (Hymenoptera: Braconidae) for the management of postharvest moth pests is the short duration of the last instar stage of the hosts, which is the preferred stage by the parasitoid for development. It is postulated that mass rearing of the parasitoid on diapausing larvae is possible due to arrested development of the last instar of Pyralid hosts that offers the parasitoid a wider window to paralyze host larvae. Laboratory studie...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

The combined approach of strain discovery and the inbred line technique for improving control of Delia radicum with Heterorhabditis bacteriophora
This study demonstrates the utility of combining strain discovery with the inbred line approach for improved biological control. Graphical abstract (Source: Biological Control)
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

Remediation of Phytophthora ramorum-infested soil with Trichoderma asperellum isolate 04-22 under ornamental nursery conditions
This study was conducted to validate these previous studies under common ornamental nursery practices. Over a 2-year period, microplots were inserted into artificially-infested P. ramorum field soil. The soil was treated with wheat bran colonized by Ta 04-22, a soil fungicide, or two biologically-based commercial products. After a 12-week period, the Ta 04-22 treatment was significantly different than the other treatments, except the fungicide treatment, reducing P. ramorum to non-detectable levels. Another trial, set up in the same manner, compared different formulations of Ta 04-22. After 12 weeks, there was no differenc...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

Biocontrol of Fusarium verticilliodes using organic amendments and their actinomycete isolates
Publication date: Available online 11 December 2017 Source:Biological Control Author(s): Phuong-Anh Nguyen, Caroline Strub, Noel Durand, Pascaline Alter, Angélique Fontana, Sabine Schorr-Galindo In a sustainable development concern, the agricultural practices notably those to control the pathogenic and/or mycotoxigenic fungi that maintain the quality and the abundance of crops with respecting the ecosystems and public health are indispensable. Our study focuses on evaluating the biocontrol potential of the actinomycete microflora of some organic amendments against the phytopathogenic and mycotoxigenic Fusarium vert...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

Loss of coevolved basal and plastic responses to temperature may underlie trophic level host-parasitoid interactions under global change
Publication date: Available online 11 December 2017 Source:Biological Control Author(s): Honest Machekano, Brighton M. Mvumi, Casper Nyamukondiwa Climate change has complex impacts on insect life history traits, biogeography, survival, population dynamics and host-parasitoid seasonal phenologies that affect their synchrony. This is more pronounced in tropical Southern Africa, where global warming may be relatively high. While some work on Plutella xylostella (L.) temperature tolerance has been reported, none focussed on African field insect populations and implications of trophic level interaction on biological control. T...
Source: Biological Control - December 13, 2017 Category: Biology Source Type: research

When insect endosymbionts and plant endophytes mediate biological control outcomes
Publication date: Available online 6 November 2017 Source:Biological Control Author(s): J.P. Michaud, Judith K. Pell, Fernando E. Vega (Source: Biological Control)
Source: Biological Control - November 13, 2017 Category: Biology Source Type: research

Control of cyst nematodes by Lysobacter enzymogenes strain C3 and the role of the antibiotic HSAF in the biological control activity
In this study, strain C3 was investigated for its activity against various life history stages of Heterodera schactii, the sugarbeet cyst nematode (SBCN), and H. glycines, the soybean cyst nematode (SCN), on roots. Strain C3 was applied to the roots of cabbage, sugarbeet, and soybean grown in growth pouches, sand, and a sand-soil medium, respectively, under growth chamber conditions. Cabbage and sugarbeet roots were subsequently challenged with SBCN, while soybean roots were inoculated with SCN. Treatment of sugarbeet with C3 reduced the number of SBCN nematodes in the roots compared to the no bacteria control, while treat...
Source: Biological Control - November 12, 2017 Category: Biology Source Type: research

Mechanisms underlying the protective effects of beneficial fungi against plant diseases
Publication date: Available online 9 November 2017 Source:Biological Control Author(s): Mansour Ghorbanpour, Mahtab Omidvari, Payman Abbaszadeh-Dahaji, Reza Omidvar, Khalil Kariman Plant diseases are a serious threat to the health and functionality of both natural and man-made ecosystems. Diverse methods and strategies are being employed to prevent, ameliorate or control plant diseases. Unsustainable practices such as use and misuse of synthetic fungicides have caused severe harm to human health, wildlife and the environment. However, sustainable and eco-friendly approaches such as use of beneficial fungi have gained sign...
Source: Biological Control - November 11, 2017 Category: Biology Source Type: research

Isolation of fruit colonizer yeasts and screening against mango decay caused by multiple pathogens
In this study, 182 yeast isolates were isolated from ripe fruits of native wild plant species and other fruit crops from the Brazilian semi-arid region and selected against four prevalent agents of mango decay in tropical regions. The largest number of isolates was obtained from table and wine-grapes, followed by the native Spondias tuberosa. In dual culture assays, 8.8% of the yeast isolates showed growth inhibition halos of at least one of the pathogens. However, only six yeasts reduced the development of lesions in vivo to less than 50%. Yeast/pathogens co-inoculation in healthy mango fruits in semi-commercial condition...
Source: Biological Control - November 9, 2017 Category: Biology Source Type: research

Plant growth promoting and inducible antifungal activities of irrigation well water-bacteria
Publication date: Available online 3 November 2017 Source:Biological Control Author(s): Nassira Tabli, Abdelwahab Rai, Leila Bensidhoum, Gianna Palmieri, Marta Gogliettino, Ennio Cocca, Carmela Consiglio, Fabrizio Cillo, Giovanni Bubici, Elhafid Nabti Different bacterial groups in irrigation well water are strongly implicated in soil health and plant development. Herein, 48 bacterial strains were isolated from agricultural well water in northern Algeria. Among them, four strains were selected based on their antifungal potential and their ability to express Plant Growth Promoting traits such as Indole Acetic Acid (IAA), hy...
Source: Biological Control - November 8, 2017 Category: Biology Source Type: research

Modeling the compensatory response of an invasive tree to specialist insect herbivory
This study used a modeling approach to predict the effect of different levels of foliage herbivory by biological control agents introduced to control the invasive tree Melaleuca quinquennervia (melaleuca) in Florida. It is assumed in the model that melaleuca can optimally change its carbon and nitrogen allocation strategies in order to compensate for the effects of herbivory. The model includes reallocation of more resources to production and maintenance of photosynthetic tissues at the expense of roots. This compensation is shown to buffer the severity of the defoliation effect, but the model predicts a limit on the maxim...
Source: Biological Control - November 8, 2017 Category: Biology Source Type: research

Editorial: When insect endosymbionts and plant endophytes mediate biological control outcomes
Publication date: Available online 6 November 2017 Source:Biological Control Author(s): J.P. Michaud, Judith K. Pell, Fernando E. Vega (Source: Biological Control)
Source: Biological Control - November 7, 2017 Category: Biology Source Type: research

Screening Bacillus species as biological control agents of Gaeumannomyces graminis var. tritici on wheat
In this study, 155 putative Bacillus strains isolated from soil were tested as potential BCAs against Ggt. The most effective was strain YB-57, which was identified as B. subtilis using 16S rDNA, morphology and physiology. Strain YB-57 showed as high as 60.9% growth inhibition of Ggt and also exhibited significantly inhibitory activity against seven other fungal phytopathogens, indicating broad-spectrum antagonism to fungi. Greenhouse studies showed that YB-57 lowered the incidence of the take-all disease by 56.5%, which was similar to that of the fungicide, silthiofam. The antimicrobial activity of crude extracts from str...
Source: Biological Control - November 7, 2017 Category: Biology Source Type: research

Cover crop termination techniques affect ground predation within an organic vegetable rotation system: a test with artificial caterpillars.
In conclusion, our field experiments showed that artificial caterpillars could represent a good standardized method to assess predation pressure in different habitats. (Source: Biological Control)
Source: Biological Control - November 3, 2017 Category: Biology Source Type: research

Food and nymph stage duration influence life table parameters of the predator Brontocoris tabidus (Heteroptera: Pentatomidae)
The objective of this study was to evaluate the duration of nymph instars, reproduction and the life expectancy table of the predator B. tabidus fed with or without Eucalyptus cloeziana plants and Tenebrio molitor Linnaeus (Coleoptera: Tenebrionidae) in the field. Brontocoris tabidus females were separated into those with short (a) or long (b) instar durations. Life expectancy (ex) of B. tabidus females from nymphs with short stage duration, reared on E. cloeziana with prey was higher than those from long nymph stage with or without plant material. Feeding on plant material and/or prey changes life table parameters for the...
Source: Biological Control - November 3, 2017 Category: Biology Source Type: research

Interspecific competition between Peristenus spretus and Peristenus relictus (Hymenoptera: Braconidae), larval parasitoids of Apolygus lucorum (Hemiptera:Miridae)
In this study, interspecific competition between larvae of P. spretus and P. relictus for the nutrients inside their common host, the green plant bug (Apolygus lucorum Meyer-Dürin), as well as their extrinsic competition for host resources were investigated in the laboratory. We examined the effect of four different time intervals between oviposition by the two species (10 min, 24 h, 48 h, and 72 h) and two parasitoid sequences (i.e., P. spretus before P. relictus [Ps-Pr] and P. relictus before P. spretus (Pr-Ps)] in no-choice tests to measure nutrient competition between the two species. In choice tests, three densit...
Source: Biological Control - November 3, 2017 Category: Biology Source Type: research

Egg maturation by Gonatopus bonaerensis (Hymenoptera: Dryinidae) when provided with two species of planthopper (Delphacidae) as hosts
Publication date: Available online 2 November 2017 Source:Biological Control Author(s): M.S. Espinosa, E.G. Virla Type of ovariole, oöcyte maturation, and ovigeny pattern in the parasitoid Gonatopus bonaerensis Virla (Hymenoptera: Dryinidae) were studied using two species of Delphacidae as hosts. The ovaries of G. bonaerensis are composed of three polytrophic meroistic ovarioles. Females are autogenic and the initial egg load averages 3.7 mature eggs. G. bonaerensis is a strongly synovigenic species when parasitizing its usual host, Delphacodes sitarea Remes Lenicov and Tesón (Hem.: Delphacidae); however, when...
Source: Biological Control - November 3, 2017 Category: Biology Source Type: research

Suitability and nutritional requirements of the predatory mite Typhlodromus transvaalensis, a potential biological control agent of physic nut pest mites
Publication date: December 2017 Source:Biological Control, Volume 115 Author(s): Ernesto Cañarte, Renato A. Sarmento, Madelaine Venzon, Marçal Pedro-Neto, Diogenis F. Ferreira Junior, Fabio A. Santos, Angelo Pallini The physic nut (Jatropha curcas) is a potential plant for biofuel production. However, its productivity is limited by pests such as the broad mite (Polyphagotarsonemus latus) and the red spider mite (Tetranychus bastosi). Despite the problems resulting from their misuse, chemicals are currently the primary method of controlling these herbivorous mites, but biological control by native organisms r...
Source: Biological Control - November 3, 2017 Category: Biology Source Type: research

Generalist predators consume spider mites despite the presence of alternative prey
Publication date: December 2017 Source:Biological Control, Volume 115 Author(s): Karol L. Krey, Carmen K. Blubaugh, Eric G. Chapman, Christine A. Lynch, Gretchen B. Snyder, Andrew S. Jensen, Zhen Fu, Deirdre A. Prischmann-Voldseth, James D. Harwood, William E. Snyder The broad feeding habits of generalist predators can lead to uncertainty about their impacts on particular pests. Due to prey switching, consumption of one pest species by generalist predators might decrease as densities of attractive alternative prey increase. To test this, we used molecular tools to examine presence/absence of two-spotted spider mites (Tetr...
Source: Biological Control - November 3, 2017 Category: Biology Source Type: research

Antagonistic yeasts for the biological control of Penicillium digitatum on lemons stored under export conditions
Publication date: Available online 10 October 2017 Source:Biological Control Author(s): María Florencia Perez, Julia Perez Ibarreche, Ana Sofía Isas, Milena Sepulveda, Jacqueline Ramallo, Julián Rafael Dib The main phytopathogen that affects lemons in the postharvest stage is Penicillium digitatum. Currently, chemical fungicides which have been shown to have negative impacts on both, the environment and human health are used to combat fungus decay. As alternatives to the use of these fungicides killer yeasts which were previously isolated from citrus plants, showed an effective biocontrol effect again...
Source: Biological Control - October 11, 2017 Category: Biology Source Type: research

Non-crop plant to attract and conserve an aphid predator (Coleoptera: Coccinellidae) in tomato
Publication date: Available online 9 October 2017 Source:Biological Control Author(s): Morgana Maria Fonseca, Eraldo Lima, Felipe Lemos, Madelaine Venzon, Arne Janssen Pest control is an important ecosystem service that can be enhanced by increasing plant diversity. One of the simplest forms of plant diversification is making use of the occurring weeds that may benefit natural enemies of crop pests. We investigated the interaction between tomato plants, beggar-ticks (Bidens pilosa, Asteraceae), a common weed in Brazil and elsewhere, and the native ladybird beetle Cycloneda sanguinea, an important predator of aphids. The p...
Source: Biological Control - October 10, 2017 Category: Biology Source Type: research

Digital video surveillance of natural enemy activity on Diaphorina citri (Hemiptera: Liviidae) colonies infesting citrus in the southern California urban landscape.
This study highlights the importance of natural enemies and ant-psyllid interactions in the biological control of D. citri in urban citrus ecosystems. Therefore, conservation of natural enemies and ant control should be considered for the sustainable management of this pest-disease complex. (Source: Biological Control)
Source: Biological Control - October 10, 2017 Category: Biology Source Type: research

PCR-based gut content analysis to identify arthropod predators of Haplodiplosis marginata
Publication date: Available online 4 October 2017 Source:Biological Control Author(s): Charlotte Rowley, Andrew J. Cherrill, Simon R. Leather, Alexander W. McCormack, Janetta E. Skarp, Tom W. Pope Saddle gall midge (Haplodiplosis marginata) is a cereal pest exhibiting sporadic outbreaks for which chemical control options are limited. Integrated Pest Management programs may offer a means of suppressing H. marginata outbreaks, reducing pesticide input. Many IPM programs benefit from the natural population suppression inflicted through predation and parasitism. The larval stage of H. marginata overwinters in the soil and may...
Source: Biological Control - October 5, 2017 Category: Biology Source Type: research

Improvement of biomass and cyclic lipopeptides production in Bacillus amyloliquefaciens MEP218 by modifying carbon and nitrogen sources and ratios of the culture media
Publication date: Available online 3 October 2017 Source:Biological Control Author(s): Daniela B. Medeot, Magdalena Bertorelo-Cuenca, Juan Pablo Liaudat, Florencia Alvarez, María Laura Flores-Cáceres, Edgardo Jofré Bacillus amyloliquefaciens MEP218 is a native isolate with a broad spectrum of antifungal activity against plant pathogenic fungi. The ability ofstrain MEP218to antagonize phytopathogens is due to the production of cyclic lipopeptides (CLPs). In this work, different carbon (C) and nitrogen (N) sources and C to N ratios were evaluated in order to improve both, biomass and CLPs production by ...
Source: Biological Control - October 4, 2017 Category: Biology Source Type: research

A new method for loading predatory mites with entomopathogenic fungi for biological control of their prey
In this study, a method has been developed for predatory mites to collect and transport Beauveria bassiana conidia directly from the commercial rearing substrate. Increasing the duration of exposure (2-24 hours) to contaminated substrate significantly increased the number of conidia retained on the body of a soil predatory mite, Stratiolaelaps scimitus. However, this was not observed in two phytoseiid species, Neoseiulus cucumeris and Amblyseius swirskii. These results suggest that upon receiving predatory mites from a supplier of biocontrol agents, conidia can be mixed into the substrate and, for the soil predatory mite, ...
Source: Biological Control - September 28, 2017 Category: Biology Source Type: research

Interaction between endoparasitoid Microplitis mediator (Hymenoptera: Braconidae) and nucleopolyhedrovirus in larvae of Helicoverpa armigera (Lepidoptera: Noctuidae)
This study explored the interactions between M. mediator and HearNPV in H. armigera through bioassay analysis. The mortality of H. armigera caused by HearNPV inoculation on 2nd instars showed linear relationship with the concentration of the inoculated HearNPV, but the mortality due to HearNPV infection was reduced when HearNPV was inoculated on the third and fourth day post-parasitism by M. mediator. The mortality due to parasitism separately decreased with the increasing of the parasitism host instar. The performance of M. mediator, including survival rate, development duration and the cocoon weight declined with the red...
Source: Biological Control - September 22, 2017 Category: Biology Source Type: research

Interaction of Fusarium oxysporum f. sp. gladioli and Meloidogyne incognita on gladiolus cultivars and its management through corm treatment with biopesticides and pesticides
Publication date: Available online 20 September 2017 Source:Biological Control Author(s): Mujeebur Rahman Khan, Shumaila Shahid, Fayaz A. Mohidin, Uzma Mustafa Effects of single and concomitant (simultaneous) inoculations with Fusarium oxysporum f. sp. gladioli (Fog) and Meloidogyne incognita (Mi) were examined on the plant growth and flowering of five cultivars of gladiolus viz., King Lear, Her Majesty, Friendship, White Prosperity and American Beauty in earthen pots. In addition, the effectiveness of corm dressing with Trichoderma harzianum, Pseudomonas fluorescens, carbendazim and nemacur against corm rot and yellows, ...
Source: Biological Control - September 21, 2017 Category: Biology Source Type: research

Life table and predation rates of the syrphid fly Allograpta exotica, a control agent of the cowpea aphid Aphis craccivora
Publication date: Available online 17 September 2017 Source:Biological Control Author(s): Evelin Arcaya, Celeste Pérez-bañón, Ximo Mengual, José jacobo zubcoff-vallejo, Santos Rojo Larvae of Allograpta exotica (Wiedemann, 1830) (Diptera: Syrphidae) are important natural enemies of common agricultural pests such as aphids (Hemiptera: Aphididae). Life history, life table and functional response of A. exotica were determined using the cowpea aphid Aphis craccivora Koch, 1854 as prey under controlled conditions of temperature, humidity and light. The average recorded duration of A. exotica developm...
Source: Biological Control - September 19, 2017 Category: Biology Source Type: research

Provisioning of food supplements enhances the conservation of phytoseiid mites in citrus
Publication date: Available online 17 September 2017 Source:Biological Control Author(s): Aleixandre Beltrà, Altea Calabuig, Cristina Navarro-Campos, María José Ramirez, Antonia Soto, Ferran Garcia-Marí, Felix L. Wäckers, Apostolos Pekas Phytoseiid mites (Acari: Phytoseiidae) are amongst the most abundant and important predators in citrus. They range from specialist species feeding exclusively on spider mites to generalist species that can feed and reproduce on several prey as well as non-prey foods such as pollen, fungi and honeydew. Feeding on non-prey foods is crucial for the conservati...
Source: Biological Control - September 19, 2017 Category: Biology Source Type: research

The inherent complexity of soil and foliar predators for greenhouse biological control
Publication date: Available online 18 September 2017 Source:Biological Control Author(s): Jason M. Schmidt, Emily A. Pochubay, Joseph Tourtois, Matthew J. Grieshop In greenhouse systems it is commonplace to release a suite of predators or parasitoids to combat pest populations that grow in both the vegetative portion of plants and soil. For instance, to control thrips and fly pests, a combination of Neoseiulus cucumeris (Oudemans 1930), a foliar predatory mite, Stratiolaelaps miles (Berlese 1892), a soil dwelling mite and Dalotia coriaria (Kraatz 1856), a soil dwelling beetle, show efficacy for controlling all life-stages...
Source: Biological Control - September 19, 2017 Category: Biology Source Type: research