Exploiting diapause and cold tolerance to enhance the use of the green lacewing Chrysopa formosa for biological control
Publication date: Available online 28 August 2018Source: Biological ControlAuthor(s): Yuyan Li, Manzi Wang, Fei Gao, Hongzhi Zhang, Hongyin Chen, Mengqing Wang, Chenxi Liu, Lisheng ZhangAbstractKnowledge of environmental regulation of diapause in the green lacewing Chrysopa formosa, an important polyphagous predator against various pests, is essential for understanding seasonal adaptations of insects and for increasing the shelf-life and shipment of chrysopids used in biological control programs. In the present study, we identified environmental factors responsible for induction and termination of diapause and cold toleran...
Source: Biological Control - August 30, 2018 Category: Biology Source Type: research

Dynamics of compost microbiota during the cultivation of Agaricus bisporus in the presence of Bacillus velezensis QST713 as biocontrol agent against Trichoderma aggressivum
This study provides new information on the dynamics, composition and structure of microbial communities of A. bisporus culture compost, the interactions that may occur in this ecosystem and will provide a better understanding of these biocontrol solutions for a better use of these tools. (Source: Biological Control)
Source: Biological Control - August 28, 2018 Category: Biology Source Type: research

Biocontrol potential of Paenibacillus polymyxa against Verticillium dahliae infecting cotton plants
This study revealed that P. polymyxa ShX301 had high potential to be used as biocontrol agent and/or plant growth-promoting bacterium in agriculture. (Source: Biological Control)
Source: Biological Control - August 26, 2018 Category: Biology Source Type: research

Impact of the parasitoid Aphelinus certus on soybean aphid populations
Publication date: December 2018Source: Biological Control, Volume 127Author(s): Joe M. Kaser, George E. HeimpelAbstractAphelinus certus Yasnosh (Hymenoptera: Aphelinidae) is an accidentally introduced parasitoid of the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae) in North America and it has become one of the most common natural enemies of soybean aphids in its adventive range. It is unclear, however, if increased prevalence of A. certus has resulted in increased biological control. We conducted an exclusion-cage experiment designed to isolate the impact of parasitoids from that of other resident natural e...
Source: Biological Control - August 26, 2018 Category: Biology Source Type: research

Antimicrobial potential of metabolites extracted from ginseng bacterial endophyte Burkholderia stabilis against ginseng pathogens
Publication date: Available online 24 August 2018Source: Biological ControlAuthor(s): Hoki Kim, Soon Ok Rim, Hanhong BaeAbstractGinseng (Panax ginseng Mayer) is one of the most important medicinal plants used for diverse medicinal purposes. Ginseng can be affected by several life-threatening diseases due to long cultivation periods. Chemical agents used to control diseases have several drawbacks for plants, environment, and consumers. Therefore, there is an urgent need to replace chemicals by biological and eco-friendly agents. We tested the activity of a bacterial endophyte, Burkholderia stabilis EB159 (PG159, GenBank acc...
Source: Biological Control - August 24, 2018 Category: Biology Source Type: research

Bio-effective disease control and plant growth promotion in lentil by two pesticide degrading strains of Bacillus sp
In this study, two methomyl degrading Bacillus sp. were screened for their antagonistic potential against soil borne pathogen identified as Alternaria sp. which causes leaf spot and blight disease in lentil. Both the strains produced non-volatile and volatile organic compounds, extracellular enzymes, siderophore, indole acetic acid and solubilized phosphate which ascribed to the mechanism of bio-control and plant growth promotion. These bacterial strains produced indole acetic acid, chitinase and solubilized phosphate even in presence of pesticides (namely methomyl, carbendazim and imidacloprid). The production of chitinas...
Source: Biological Control - August 24, 2018 Category: Biology Source Type: research

Overexpression of an aquaglyceroporin gene in Trichoderma harzianum affects stress tolerance, pathogen antagonism and Phaseolus vulgaris development
In this study, we report the cloning and overexpression of Thaqp in T. harzianum. Following transformation of T. harzianum via biobalistics, analysis of the resulting transformants showed that their tolerance to salt and osmotic stress was decreased when compared to the wild type. However, enhanced antagonistic activity against Fusarium oxysporum was observed in plate confrontation assays. Furthermore, evaluation of bean development after inoculation with transformants overexpressing Thaqp revealed plants with increased root volume, leaf area and dry weight. Our results underscore the strong potential of aquaglyceroporin i...
Source: Biological Control - August 24, 2018 Category: Biology Source Type: research

The soil mite Gaeolaelaps (Hypoaspis) aculeifer (Canestrini) (Acari: Laelapidae) as a predator of the invasive citrus mealybug Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae): implications for biological control
Publication date: Available online 22 August 2018Source: Biological ControlAuthor(s): J. Pérez-Rodríguez, J. Calvo, A. Urbaneja, A. TenaAbstractSoil-dwelling predatory mites are important biocontrol agents of several pests. Despite their wide prey range, they have never been evaluated as predators of mealybugs that inhabit the soil. Here, we tested the potential of the soil mite Gaeolaelaps (Hypoaspis) aculeifer (Canestrini) (Acari: Laelapidae) as a predator of the invasive citrus mealybug Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae). The predation, and fecundity of mites over a 14-day period ...
Source: Biological Control - August 23, 2018 Category: Biology Source Type: research

Muddy waters: efficacious predation of container-breeding mosquitoes by a newly-described calanoid copepod across differential water clarities
Publication date: Available online 22 August 2018Source: Biological ControlAuthor(s): Ross N. Cuthbert, Tatenda Dalu, Ryan J. Wasserman, Neil.E. Coughlan, Amanda Callaghan, Olaf L.F. Weyl, Jaimie T.A. DickAbstractMosquito-borne diseases induce unrivalled morbidity and mortality in human populations. In recent times, greater urbanisation has facilitated vector population expansion, particularly of those which proliferate in container-style habitats. To combat increased associated disease risk, we urgently require innovative and efficacious control mechanisms to be identified and implemented. Predatory biological control of ...
Source: Biological Control - August 23, 2018 Category: Biology Source Type: research

Are commercial stocks of biological control agents genetically depauperate? – A case study on the pirate bug Orius majusculus Reuter
Publication date: Available online 23 August 2018Source: Biological ControlAuthor(s): Louise B. Rasmussen, Kim Jensen, Jesper G. Sørensen, Elsa Sverrisdóttir, Kåre L. Nielsen, Johannes Overgaard, Martin Holmstrup, Torsten N. KristensenAbstractPredatory arthropods are increasingly used in biological control of insect pests. For this purpose, control agents are produced commercially in large quantities for release in crops. The production stocks, however, may have undergone numerous population bottlenecks and may have been exposed to artificial selection pressures in the production facilities. Accordingly...
Source: Biological Control - August 23, 2018 Category: Biology Source Type: research

Assessing the non-targeted effect of copper on the leaf arthropods communities in a vineyard
In this study, we monitored simultaneously the direct effect of Bordeaux mixture on three grapevine leaf diseases and five leaf arthropods (beneficial and/or pest) over 4 months in 2014 and 2015, under field conditions. We found a strong interaction between the sampling years and the treatments within all tested organisms. Overall, the presence of copper generally decreases the occurrence of disease and the densities of leaf arthropods; though primarily in 2014, more likely because of the contrasted climatic conditions between the years. Thus, copper reduces some pest densities but also biological agent densities which mig...
Source: Biological Control - August 18, 2018 Category: Biology Source Type: research

Entomopathogenic nematode performance against Popillia japonica (Coleoptera: Scarabaeidae) in school athletic turf: Effects of traffic and soil properties
Publication date: Available online 17 August 2018Source: Biological ControlAuthor(s): M.S. Helmberger, J.S. Thaler, E.J. Shields, K.G. WickingsAbstractEntomopathogenic nematodes (EPNs) have potential as an alternate means of controlling soil-dwelling pests in settings such as school athletic fields, where use of chemical pesticides is often restricted or prohibited. Athletic fields are also unique among turfgrass systems, as their distinct pattern of foot traffic can result in compaction and other soil properties varying across different areas of the field, potentially causing variability in EPN performance even within a s...
Source: Biological Control - August 18, 2018 Category: Biology Source Type: research

390Impact of the parasitoid Aphelinus certus on soybean aphid populations
Publication date: Available online 17 August 2018Source: Biological ControlAuthor(s): Joe M. Kaser, George E. HeimpelAbstractAphelinus certus Yasnosh (Hymenoptera: Aphelinidae) is an accidentally introduced parasitoid of the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae) in North America and it has become one of the most common natural enemies of soybean aphids in its adventive range. It is unclear, however, if increased prevalence of A. certus has resulted in increased biological control. We conducted an exclusion-cage experiment designed to isolate the impact of parasitoids from that of other resident nat...
Source: Biological Control - August 18, 2018 Category: Biology Source Type: research

Assessing annual and perennial flowering plants for biological control in asparagus
Publication date: Available online 17 August 2018Source: Biological ControlAuthor(s): Amanda Buchanan, Matthew Grieshop, Zsofia SzendreiAbstractDespite the progress made to date to incorporate habitat diversification in farms, implementing it effectively for biological control programs in agriculture still faces many challenges. Our goal was to screen annual and perennial flowering plant species for their attractiveness to natural enemies and herbivores, and to select promising species to be used as flower enhancements in asparagus agroecosystems. Tested perennials were generally more attractive to predators than to parasi...
Source: Biological Control - August 18, 2018 Category: Biology Source Type: research

Overexpression of an aquaglyceroporin gene in the fungal biocontrol agent Trichoderma harzianum affects stress tolerance, pathogen antagonism and Phaseolus vulgaris development
In this study, we report the cloning and overexpression of Thaqp in T. harzianum. Following transformation of T. harzianum via biobalistics, analysis of the resulting transformants showed that their tolerance to salt and osmotic stress was decreased when compared to the wild type. However, enhanced antagonistic activity against Fusarium oxysporum was observed in plate confrontation assays. Furthermore, evaluation of bean development after inoculation with transformants overexpressing Thaqp revealed plants with increased root volume, leaf area and dry weight. Our results underscore the strong potential of aquaglyceroporin i...
Source: Biological Control - August 18, 2018 Category: Biology Source Type: research

Dispersal capacity of the egg parasitoid Telenomus remus Nixon (Hymenoptera: Platygastridae) in maize and soybean crops
This study examined the dispersal capacity of the parasitoid Telenomus remus Nixon (Hymenoptera: Platygastridae) in soybean and maize crops. Knowledge on mobility and dispersal capacity of parasitoids is crucial for the implementation of successful biological control strategies using this biological control agent. Experiments were conducted at the experimental farm of Embrapa Soja located in Londrina, PR (-51°11'0.54“ Long.; -23°11'58.94” Lat.) in the crop seasons of 2012, 2012/13 and 2013 at different plant phenological stages. Experimental plots consisted of six concentric circles with radii of 5, 10,...
Source: Biological Control - August 11, 2018 Category: Biology Source Type: research

A modified enzymatic method for measuring insect sugars and the effect of storing samples in ethanol on subsequent trehalose measurements
Publication date: Available online 7 August 2018Source: Biological ControlAuthor(s): C.B. Phillips, E. Hiszczynska-Sawicka, I.I. Iline, M. Novoselov, J. Jiao, N.K. Richards, S. HardwickAbstractA modified method for enzymatically measuring concentrations of glucose, fructose and trehalose in parasitoid wasps is described and evaluated. The method has high specificity, gives results comparable to high performance liquid chromatography (HPLC), and shows good correlations with HPLC. The enzymatic method is quicker and less expensive than HPLC, and is safer, faster and more sensitive than another commonly used insect sugar dete...
Source: Biological Control - August 8, 2018 Category: Biology Source Type: research

Biocontrol of Meloidogyne incognita by Metarhizium guizhouense and its protease
Publication date: Available online 7 August 2018Source: Biological ControlAuthor(s): Apivit Thongkaewyuan, Thanunchanok ChairinAbstractCrude extracts of the fungus Metarhizium guizhouense PSUM02 grown on protein- enriched medium showed high proteolytic activity and produced one main protein indicated as fungal protease with 33 kDa molecular mass. The protease activity had high stability when incubated at 10 or -20 oC for 6 months. The use of Metarhizium spores (1 × 104 spore mL-1) in combination with its protease (354.1 ± 2.2 U mL-1) completely inhibited hatching of the root-knot nematode Meloidogyne...
Source: Biological Control - August 7, 2018 Category: Biology Source Type: research

The parasitoid Trichogrammatoidea armigera Nagaraja (Hymenoptera: Trichogrammatidae) is a potential candidate for biological control of the millet head miner Heliocheilus albipunctella (de Joannis) (Lepidoptera: Noctuidae) in the Sahel
Publication date: Available online 7 August 2018Source: Biological ControlAuthor(s): Laouali Karimoune, Malick Niango Ba, Ibrahim B. Baoua, Rangaswamy Muniappan (Source: Biological Control)
Source: Biological Control - August 7, 2018 Category: Biology Source Type: research

Bacterial endophytes isolated from mountain-cultivated ginseng (Panax ginseng Mayer) have biocontrol potential against ginseng pathogens
Publication date: Available online 4 August 2018Source: Biological ControlAuthor(s): Md. Emran Khan Chowdhury, Hanhong BaeAbtractGinseng (Panax ginseng Meyer) is a perennial medicinal plant. Long cultivation practice makes ginseng vulnerable to attack by various biotic constrains. The biocontrol of ginseng pathogens with microbes is an important alternative to chemical control. We screened 252 bacterial endophytes isolated from mountain-cultivated ginseng against 6 ginseng pathogens. Twelve bacterial endophytes were selected using a dual culture assay. Overall, Burkholderia stabilis EB159 (PG159) exerted the greatest inhib...
Source: Biological Control - August 4, 2018 Category: Biology Source Type: research

Fungal entomopathogens as endophytes reduce several species of Fusarium causing crown and root rot in sweet pepper (Capsicum annuum L.)
This study demonstrates for the first time the biocontrol potential of endophytic fungal entomopathogens against several Fusarium species causing FCRR. It is also the first report for the suppressive activity of M. brunneum as an endophyte against plant pathogens.Graphical abstract (Source: Biological Control)
Source: Biological Control - August 4, 2018 Category: Biology Source Type: research

The hyperparasitoid Marietta picta (Hymenoptera: Aphelinidae) mediates competitive interactions between two parasitoids of Paratrioza sinica (Hemiptera: Psyllidae): Tamarixia lyciumi (Hymenoptera: Eulophidae) and Psyllaephagus arenarius (Hymenoptera: Encyrtidae)
Publication date: Available online 3 August 2018Source: Biological ControlAuthor(s): Pengxiang Wu, Baoxu Ma, Shuo Yan, Jing Xu, Runzhi ZhangAbstractBoth the ectoparasitoid Tamarixia lyciumi Yang (Hymenoptera: Eulophidae) and the endoparasitoid Psyllaephagus arenarius (Hymenoptera: Encyrtidae) are solitary nymphal parasitoids of Paratrioza sinica (Hemiptera: Psyllidae), a pest of goji berry, Lycium barbarum. Moreover, T. lyciumi is frequently attacked by a hyperparasitoid Marietta picta Andre (Hymenoptera: Aphelinidae) in the field. To analyze competitive interactions between T. lyciumi and P. arenarius mediated by M. picta...
Source: Biological Control - August 3, 2018 Category: Biology Source Type: research

Effects of bacillomycin D homologues produced by Bacillus amyloliquefaciens 83 on growth and viability of Colletotrichum gloeosporioides at different physiological stages
Publication date: Available online 3 August 2018Source: Biological ControlAuthor(s): Agustín Luna-Bulbarela, Raunel Tinoco-Valencia, Gerardo Corzo, Kohei Kazuma, Katsuhiro Konno, Enrique Galindo, Leobardo Serrano-CarreónAbstractBacillus amyloliquefaciens strain 83 is a bacterium isolated from mango phyllosphere effective to control anthracnose in various tropical crops. The antifungal activity of bacillomycin D homologues, produced by this strain, against Colletotrichum gloeosporioides was characterized in this study. Minimum inhibitory concentration (MIC100) of bacillomycin D homologues revealed that slight ...
Source: Biological Control - August 3, 2018 Category: Biology Source Type: research

Bacillus and Pseudomonas spp. provide antifungal activity against gray mold and Alternaria rot on blueberry fruit
In this study, the effect of antagonistic bacteria from the Bacillus and Pseudomonas genera was assessed on mycelial growth of Botrytis cinerea and Alternaria alternata. The bacteria were also evaluated for their suppression of gray mold and Alternaria rot on stored blueberries. Isolation of antifungal extracts and identification of antifungal compounds from bacterial strains were also performed. The results showed that various bacterial antagonists reduced mycelial growth of B. cinerea and A. alternata by up to 42 and 27%, respectively. The bacteria also provided inhibition of blueberry fruit rot by both pathogen, reducin...
Source: Biological Control - August 3, 2018 Category: Biology Source Type: research

Relative antagonistic potential of some rhizosphere biocontrol agents for the management of rice root-knot nematode, Meloidogyne graminicola
Publication date: Available online 1 August 2018Source: Biological ControlAuthor(s): Ziaul Haque, Mujeebur Rahman Khan, Faheem AhamadAbstractThe relative effectiveness of twelve indigenous rhizosphere isolates of fungal and bacterial biocontrol agents (BCAs) was evaluated against rice root-knot nematode, Meloidogyne graminicola on rice cv. PS-5. The culture filtrates of BCAs significantly inhibited egg hatching and caused mortality to nematode juveniles. However, considerable variability was observed in the degree of virulence among different isolates/strains when tested in vitro. Six most efficient isolates/strains were s...
Source: Biological Control - August 1, 2018 Category: Biology Source Type: research

Bacillus velezensis, a potential and efficient biocontrol agent in control of pepper gray mold caused by Botrytis cinerea
This study provides another high-efficiency, and potential strategies for the biological control of gray mold disease. It is the first report of B. velezensis strain which can control gray mold disease, In addition, it is also the first to comprehensively illustrate how the strains can efficiently protect pepper from B. cinerea attacking.Graphical abstract (Source: Biological Control)
Source: Biological Control - August 1, 2018 Category: Biology Source Type: research

Pupal-adult parasitism of the coconut hispine beetle by the koinobiont pupal parasitoid Tetrastichus brontispae
Publication date: Available online 31 July 2018Source: Biological ControlAuthor(s): Keiji Takasu, Jemimah N. Ndabarua, Hieu Thi Pham, Shun-ichiro TakanoAbstractPupal parasitoids are considered to be idiobionts. However, some pupal parasitoids do not seem to kill or paralyze hosts at oviposition, including Tetrastichus brontispae, an endo-pupal parasitoid of Brontispa longissima. We conducted laboratory experiments to determine if T. brontispae parasitizes pupal hosts with a koinobiont developmental strategy. For this to be the case, its immatures would have to develop during the host transition from pupa to adult and in ad...
Source: Biological Control - August 1, 2018 Category: Biology Source Type: research

Tree size as a determinant of recovery of birch (Betula pendula and B. pubescens) and grey alder (Alnus incana) trees after cutting and inoculation with Chondrostereum purpureum
Publication date: Available online 29 July 2018Source: Biological ControlAuthor(s): Leena Hamberg, Jarkko HantulaAbstractWe investigated the ability of birch (Betula pendula Roth. and B. pubescens Ehrh.) and grey alder (Alnus incana (L.) Moench) trees of different sizes to recover after cutting and artificial infection with a common decay fungus, Chondrostereum purpureum (Pers. Ex Fr.) Pouzar. In birch, resistance to C. purpureum was initially highest among stumps of 13 cm diameter but by the end of the experiment almost all stumps were dead, whereas in grey alder mortality happened more slowly than in birch and was the sa...
Source: Biological Control - July 29, 2018 Category: Biology Source Type: research

Why do Spodoptera exigua multiple nucleopolyhedrovirus occlusion bodies lose insecticidal activity on amaranth (Amaranthus hypocondriacus L.)?
Publication date: Available online 29 July 2018Source: Biological ControlAuthor(s): Rodrigo Lasa, José A. Guerrero-Analco, Juan L. Monribot-Villanueva, Gabriel Mercado, Trevor WilliamsAbstractAmaranth (Amaranthus hypocondriacus L.) is a pseudocereal that is widely consumed in Mexico and other tropical regions, but which is attacked by Spodoptera exigua (Hübner) larvae. Products based on Spodoptera exigua multiple nucleopolyhedrovirus (SeMNPV) can be highly effective insecticides, but when applied to amaranth viral occlusion bodies (OBs) lost 50% of their activity in a 6 h period. A series of experiments was per...
Source: Biological Control - July 29, 2018 Category: Biology Source Type: research

Thermal disturbance of fertile soils to search for new biological control options in strawberry crops affected by yield decline
Publication date: Available online 29 July 2018Source: Biological ControlAuthor(s): L.M. Manici, F. Caputo, A. Rossi, A.R. Topp, M. Zago, M. KeldererAbstractA study aiming at investigating biological control agents for protecting strawberry during the post-transplant period was performed. For this purpose, a series of fertile soils, rich in organic matter, which had been subjected to intensive strawberry cultivation, were selected. Soil samples taken from those soils were subjected to thermal treatment (up to 80 °C) for a short time to induce microbial changes aiming at improving soil suppressiveness. A greenhouse grow...
Source: Biological Control - July 29, 2018 Category: Biology Source Type: research

Editorial Board
Publication date: October 2018Source: Biological Control, Volume 125Author(s): (Source: Biological Control)
Source: Biological Control - July 27, 2018 Category: Biology Source Type: research

Conservation biological control using selective insecticides – a valuable tool for IPM
Publication date: Available online 27 July 2018Source: Biological ControlAuthor(s): Jorge B. Torres, Adeney de F. BuenoAbstractConservation biological control (CBC) has widely benefited from ecological practices that enhance both the crop and its surrounding environment. However, use of insecticides, whether biological or synthetic compounds, is often detrimental to natural enemies. By definition toxic to insects, insecticides may cause direct mortality of natural enemies, reduce food resources (prey/host), or disrupt behavioral and biological processes. Therefore, choosing a selective insecticide or selectively applying a...
Source: Biological Control - July 27, 2018 Category: Biology Source Type: research

Antifungal activity screening of soil actinobacteria isolated from Inner Mongolia, China
In conclusion, Streptomyces 12-09-4 and 12-09-11 might have potential to be developed as biocontrol agents against wheat powdery mildew and hoping to step towards sustainable agriculture. (Source: Biological Control)
Source: Biological Control - July 20, 2018 Category: Biology Source Type: research

Intraguild predation between two aphidophagous coccinellids, Hippodamia variegata (G.) and Coccinella septempunctata L. (Coleoptera: Coccinellidae): the role of prey abundance
Publication date: Available online 18 July 2018Source: Biological ControlAuthor(s): Muhammad Hamayoon Khan, Zeynep YoldaşAbstractIntraguild predation (IGP) is a common phenomenon among the predacious coccinellids which involves a combination of predation and competition. The aphidophagous predators, Coccinella septempunctata L. and Hippodamia variegata (G.) comprise major part of coccinellid predator species in the agroecosystem of Turkey. We investigated the IG interactions between these aphidophagous predators under laboratory conditions. Our results revealed that predation of the eggs of H. variegata by the adult male,...
Source: Biological Control - July 20, 2018 Category: Biology Source Type: research

Impact of temperature-mediated functional responses of Neoseiulus womersleyi and N. longispinosus (Acari: Phytoseiidae) on Tetranychus urticae (Acari: Tetranychidae)
We examined the effect of temperature on the functional responses of Neoseiulus womersleyi and N. longispinosus on eggs of the spider mite Tetranychus urticae. Logistic regression indicated that both N. womersleyi and N. longispinosus exhibited type II functional responses on prey eggs, regardless of temperature. The attack rate coefficient of N. womersleyi increased with temperature from 15 to 30°C and declined at 35°C, whereas that of N. longispinosus peaked at 20°C and then decreased with increasing temperature. The attack rate was higher in N. womersleyi than in N. longispinosus at 30 and 35°C. The hand...
Source: Biological Control - July 20, 2018 Category: Biology Source Type: research

Potential of single and combined releases of Eretmocerus mundus and Macrolophus melanotoma to suppress Bemisia tabaci in protected eggplant
In this study, the success of single and combined release of Er. mundus and M. melanotoma against B. tabaci on eggplant was determined in 3X3X2.5 m net cages established in a greenhouse during the period of 2009 and 2010. Four different experiments were conducted; Er. mundus single release, M. melanotoma single release, Er. mundus+M. melanotoma combined release, and B. tabaci single release (control). For the evaluation of population development of whitefly and the parasitoid, leaf samples were taken at five day intervals. In addition, numbers of the predatory insects were calculated by using visual control method on whole...
Source: Biological Control - July 18, 2018 Category: Biology Source Type: research

Measuring Natural Enemy Dispersal from Cover Crops in a California Vineyard
Publication date: Available online 18 July 2018Source: Biological ControlAuthor(s): N.A. Irvin, J.R. Hagler, M.S. HoddleAbstractDispersal of natural enemies from buckwheat cover crop plots embedded within a southern California vineyard during spring and summer was investigated by using an arthropod mark-capture technique. Specifically, arthropods were marked in flowering buckwheat plots by spraying plants with a “triple mark” solution containing yellow dye, casein protein, and albumin protein. In turn, we recorded the abundance of marked and unmarked natural enemies at a gradient of distances from the treated b...
Source: Biological Control - July 18, 2018 Category: Biology Source Type: research

Interactions between Diglyphus isaea and Neochrysocharis formosa (Hymenoptera: Eulophidae), two parasitoids of agromyzid leafminers
In this study, interactions between these two parasitoids and different parasitoid release modes were investigated. In Petri dishes, parasitoids were exposed to leaves infested with late second to early third instar Liriomyza sativae at two host density. The total death rate of N. formosa released alone was density-denpendent. Release modes also impacted the total death rate of parasitoids at a high host density. However, the oviposition number of D. isaea was significantly greater than that of N. formosa when they coexisted. In addition, host-feeding proportions were the greatest of the three host-killing behaviors: paras...
Source: Biological Control - July 18, 2018 Category: Biology Source Type: research

Acquisition of lethal infection, hypermobility and modified climbing behavior in nucleopolyhedrovirus infected larvae of Anticarsia gemmatalis
Publication date: Available online 12 July 2018Source: Biological ControlAuthor(s): Christian Del-Angel, Rodrigo Lasa, Gabriel Mercado, Luis A. Rodríguez-del-Bosque, Primitivo Caballero, Trevor WilliamsAbstractThe Anticarsia gemmatalis multiple nucleopolyhedrovirus (AgMNPV) is the basis for viral insecticides in several countries in Latin America. The rate of acquisition of infection and the transmission of the pathogen from infected to healthy conspecifics both influence the efficacy of virus insecticides. By comparing the leaf area consumed by larvae with their stage-specific susceptibility to infection, we estima...
Source: Biological Control - July 13, 2018 Category: Biology Source Type: research

Biocontrol potential of Myxococcus sp. strain BS against bacterial soft rot of calla lily caused by Pectobacterium carotovorum
Publication date: Available online 11 July 2018Source: Biological ControlAuthor(s): Zhoukun Li, Ting Wang, Xue Luo, Xiangmin Li, Chengyao Xia, Yuqiang Zhao, Xianfeng Ye, Yan Huang, Xiangyang Gu, Hui Cao, Zhongli Cui, Jiaqin FanAbstractBacterial soft rot caused by Pectobacterium carotovorum subsp. carotovorum is a devastating plant disease in calla lily (Zantedeschia spp.). Considering the economic value of calla lily in the cut flower industry, effective means for controlling this disease are urgently needed. A screening of 12 isolates yielded strain BS as the best antagonist against P. carotovorum. The isolate w...
Source: Biological Control - July 12, 2018 Category: Biology Source Type: research

Host instar influence on offspring sex ratio and female preference of Neodryinus typhlocybae (Ashmead) (Hymenoptera, Dryinidae) parasitoid of Metcalfa pruinosa (Say) (Homoptera, Flatidae)
Publication date: Available online 17 May 2018Source: Biological ControlAuthor(s): Riccardo Favaro, Jacob Roved, Vincenzo Girolami, Isabel Martinez-Sañudo, Luca MazzonAbstractThe parasitoid wasp Neodryinus typhlocybae (Ashmead) was introduced to Europe for the biological control of nearctic planthopper Metcalfa pruinosa (Say), which causes severe damage to both crops and ornamental species in the absence of specialized natural enemies. We performed a series of experiments to evaluate the host instar preference and the effects on parasitoid offspring sex.Results showed that parasitism occurs mostly on 3rd, 4th and 5t...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Improving the efficiency of augmentative biological control with arthropod natural enemies: A modeling approach
Publication date: Available online 17 May 2018Source: Biological ControlAuthor(s): Wouter N. Plouvier, Eric WajnbergAbstractA better understanding of the life-history traits of biocontrol agents and their effect on population dynamics is key to obtaining more efficient pest control and generating higher economic returns for biocontrol practitioners. To this end, we constructed an optimality simulation model based on principles of the behavioral ecology of natural enemies. This model allows for the identification of the most important life-history traits of natural enemies (e.g., fecundity, longevity, attack rate, competiti...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Survival of Steinernema feltiae in different formulation substrates: Improved longevity in a mixture of gel and vermiculite
This study assessed the performance of seven different formulation substrates and two combinations involving vermiculite and gel, to preserve Steinernema feltiae at three temperatures: 15 °C, 25 °C and 35 °C. The first two experiments assessed the survival and mobility of S. feltiae infective juveniles (IJs) in mushroom compost (Hobin Wood Landscaping Products), peat (sphagnum peat moss), Potting mix (Metro Mix®), polyacrylamide gel, diatomaceous earth, vermiculite, and water (control). A third experiment assessed the survival of IJs in combinations of the two best substrates selected from the prior t...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Mortality factors of Anoplophora glabripennis (Coleoptera: Cerambycidae) infesting Salix and Populus in central, northwest, and northeast China
Publication date: Available online 23 May 2018Source: Biological ControlAuthor(s): Julian R. Golec, Fei Li, Liangming Cao, Xiaoyi Wang, Jian J. DuanAbstractMortality factors affecting eggs, immatures (larvae and pupae combined), and adults of the Asian longhorned beetle, Anoplophora glabripennis, infesting Salix babylonica, Populus sp. (Section Aigeiros Duby), and P. gansuensis (Section Tacamahaca) were investigated in four Chinese provinces between 2015 and 2017. Immature density varied by location and tree species; however, overall density was highest in Jilin province. When immature density was compared between host tre...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Effect of phenolic acids from banana root exudates on root colonization and pathogen suppressive properties of Bacillus amyloliquefaciens NJN-6
This study tests the response of antibiotic producing genes (ituA and bamD) and biofilm formation related genes (epsD and yqxM) in strain NJN-6 to phenolic acids in banana root exudates. Phenolic acid in banana root exudates (infected or non-infected by FOC) were identified by HPLC. Transcription analysis of genes involved in biofilm formation and antibiotic synthesis in strain NJN-6 were investigated with quantitative reverse transcription PCR (RT-qPCR). We found that the transcription levels of two antibiotic producing genes and two biofilm formation related genes in strain NJN-6 were upregulated in the banana seedling r...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Host specificity and risk assessment of Archanara geminipuncta and Archanara neurica, two potential biocontrol agents for invasive Phragmites australis in North America
Publication date: Available online 30 May 2018Source: Biological ControlAuthor(s): Bernd Blossey, Patrick Häfliger, Lisa Tewksbury, Andrea Dávalos, Richard CasagrandeAbstractInvasive Phragmites australis is widespread in North America and despite decades of management and large annual expenditures (>5 million US$) using physical and chemical means, local populations and the species range are expanding. Allowing continued expansion does not only threaten native wetland biota but also an endemic North American subspecies Phragmites australis americanus. We used extensive multi-pronged investigations in Europe ...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

An investigation of biocontrol activity Pseudomonas and Bacillus strains against Panax ginseng root rot fungal phytopathogens
In this study, seven fungal genera (Ilyonectria sp., Neurospora sp., Cladosporium sp., Eutypella sp., Aschersonia sp., and Fusarium sp.) were isolated from infected ginseng root rot samples and examined for pathogenicity. Fungal pathogens were isolated by placing a small piece of infected ginseng root on potato dextrose agar, screened based on colony morphology, and identified based on 18s rRNA sequencing and phylogenetic analysis. Pathogenicity of the isolated fungal strains was evaluated based on pathogen penetration on the host surface that was documented by scanning electron microscopy (SEM). To isolate antagonistic st...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Plant growth promoting rhizobacteria- Bacillus amyloliquefaciens improves plant growth and induces resistance in chilli against anthracnose disease
Publication date: Available online 31 May 2018Source: Biological ControlAuthor(s): H.G. Gowtham, M. Murali, S. Brijesh Singh, T.R. Lakshmeesha, K. Narasimha Murthy, K.N. Amruthesh, S.R. NiranjanaAbstractThe present study was aimed to screen plant growth promoting rhizobacteria (PGPR) for their effect on induction of resistance in chilli (Capsicum annum L.) against anthracnose disease. A total of 59 PGPR were evaluated for their antagonistic activity against Colletotrichum truncatum and only fourteen PGPR were able to inhibit the mycelial growth of the pathogen. The pathogenicity and root colonization of the selected PGPR s...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Salinity is a Prevailing Factor for Amelioration of Wheat Blast by Biocontrol Agents
Publication date: Available online 10 July 2018Source: Biological ControlAuthor(s): Catalina Cabot, Rafael Bosch, Soledad Martos, Charlotte Poschenriederc, Analia PerellóAbstractPlants exposed to combined abiotic and biotic stress conditions may show enhanced pathogen resistance. Biocontrol agents (BCAs) can further contribute to ameliorate plant responses to these complex situations. In recent years, wheat production has been challenged by the expansion of salt-affected soils as well as by severe outbreaks of emerging diseases such as wheat blast. Here, the role of two BCAs, Pseudomonas stutzeri AN10 and Trichoderm...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Editorial Board
Publication date: September 2018Source: Biological Control, Volume 124Author(s): (Source: Biological Control)
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research