Optimization of bio-insecticide production by Tunisian Bacillus thuringiensis israelensis and its application in the field
In conclusion, BUPM98, a local strain of B. thuringiensis israelensis, is very promising bioinsecticide for mosquito population management in Tunisia. (Source: Biological Control)
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Isolation of indigenous antagonistic microorganism to inhibit Rigidoporus microporus and other plant pathogens and analysis of the bioactive compounds
This study indicates that T. asperellum F14 can be used to inhibit white root rot disease and other plant diseases. (Source: Biological Control)
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Rizhospheric competence, plant growth promotion and biocontrol efficacy of Bacillus amyloliquefaciens subsp. plantarum strain 32a
This study aimed to further define the taxonomic position of strain 32a, previously identified as a B. amyloliquefaciens, to evaluate its rhizosphere competence and its persistence in the rhizoplane of tomato and to assess its potential as growth promoting and biocontrol agent towards crown gall disease. The gyrB gene sequencing of strain 32a classified it as subsp. plantarum. This strain harbored genes related to the production of the dipeptide bacilysin and the polyketides macrolactin, bacillaene and difficidin. When tested in vitro, it was also able to produce siderophore, hydrolytic enzymes and indole-3-acetic acid and...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Biological control of boxwood blight by Pseudomonas protegens recovered from recycling irrigation systems
In this study, 1547 bacterial strains recovered from recycling irrigation systems were evaluated in vitro and in planta for their biological control efficacy against Cps. Three most potent stains 13A3, 14D5, and 34B6 identified all belonged to Pseudomonas protegens. Strains 13A3 and 14D5 reduced Cps mycelial growth by 95 to 100% in two sets of in vitro experiments including a 48-well plate assay and a dual culture assay. Strain 34B6 also reduced Cps growth by 93% in the 48-well plate assay and 66 to 72% in dual culture plates. In planta, strain 14D5 reduced Cps infection by more than 50%, while strains 13D3 and 34B6 by 40 ...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

The effects of prey distribution and digestion on functional response of Harmonia axyridis (Coleoptera: Coccinellidae)
Publication date: September 2018Source: Biological Control, Volume 124Author(s): Yi Feng, Zhao-Xu Zhou, Meng-Ru An, Xing-Lin Yu, Tong-Xian LiuAbstractThe effects of prey distribution and digestion on the functional response of an invertebrate predator Harmonia axyridis (Pallas) to varying densities of Aphis citricola (van der Goot) were investigated. Experiments were conducted in petri dish and wind tunnels with multiple plants to present conditions in which the predator could behave more naturally. To discriminate if the functional response of H. axyridis is digestion or handling limited, numbers of aphids consumed were m...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Biotic aspects involved in the control of damping-off producing agents: The role of the thermotolerant microbiota isolated from composting of plant waste
Publication date: September 2018Source: Biological Control, Volume 124Author(s): N. Sánchez San Fulgencio, F. Suárez-Estrella, M.J. López, M.M. Jurado, J.A. López-González, J. MorenoAbstractAlong with the high temperatures generated during the composting process, the microbial community of a compost pile collaborates actively in the control of damping-off producing agents. Such collaboration could be justified on the basis of the ability of the microbiota to produce fungicide substances that are involved in the control of damping-off or other bioactive compounds that affect the growth pro...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Chitosan and Pichia membranaefaciens control anthracnose by maintaining cell structural integrity of citrus fruit
Publication date: September 2018Source: Biological Control, Volume 124Author(s): Yijie Zhao, Lili Deng, Yahan Zhou, Shixiang Yao, Kaifang ZengAbstractThis work evaluated effects of chitosan and Pichia membranaefaciens treatments on anthracnose control of cell membrane and cell wall structure in citrus fruit (Citrus sinensis L. Osbeck). Pathogen infection can cause cell membrane destruction and cell wall degradation. The disease incidence and lesion diameter on chitosan- and P. membranaefaciens- treated citrus was significantly reduced, especially P. membranaefaciens. Moreover, those treatments all could regulate reactive o...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Pre-selection in laboratory tests of survival and competition before field screening of antagonistic bacterial strains against Botrytis bunch rot of grapes
Publication date: September 2018Source: Biological Control, Volume 124Author(s): Carlos Calvo-Garrido, Rana Haidar, Jean Roudet, Thomas Gautier, Marc FermaudAbstractWith only a few biocontrol products currently registered against Botrytis bunch rot (BBR) of grapes, there is a crucial need for new antagonistic strains that are able to survive and efficiently suppress B. cinerea under vineyard conditions. The aim of this study was to establish and follow a pre-selection process among potential antagonistic bacterial strains, previously identified in vivo for efficacy, and to carry out a further field screening assay using a ...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Host utilization, reproductive biology, and development of the larval parasitoid Tetrastichus planipennisi as influenced by temperature: Implications for biological control of the emerald ash borer in North America
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Jian J. Duan, Jonathan M. Schmude, Xiao-Yi Wang, Timothy J. Watt, Leah S. BauerAbstractThe success of classical biological control programs depends in part on understanding climate effects on introduced agents. Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae), a larval endoparasitoid of emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), is being introduced to EAB-invaded regions of the United States (USA) and Canada for biological control. To optimize regional release strategies and increase efficiency of t...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Biological control of Salvinia molesta in South Africa revisited
Publication date: October 2018Source: Biological Control, Volume 125Author(s): G.D. Martin, J.A Coetzee, P.S.R. Weyl, M.C. Parkinson, M.P. HillAbstractThe aquatic weed Salvinia molesta D.S. Mitch. (Salviniaceae) was first recorded in South Africa in the early 1900s, and by the 1960s was regarded as one of South Africa’s worst aquatic weeds. Following the release of the weevil, Cyrtobagous salviniae Calder and Sands (Coleoptera: Curculionidae) in 1985, the weed is now considered under successful biological control. However, the post-release evaluation of this biological control programme has been ad hoc, therefore, to...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Challenges to conservation biological control on the High Plains: 150 years of evolutionary rescue
Publication date: October 2018Source: Biological Control, Volume 125Author(s): J.P. MichaudAbstractConservation biological control (CBC) makes valuable contributions to productivity in High Plains agriculture. Despite some notable exceptions, CBC holds a wide range of potentially damaging pests under natural control, largely due to the actions of beneficial arthropod species that have endured more than a century of forced adaptation to an increasingly industrialized agricultural landscape. 'Evolutionary rescue' is a natural selection process whereby species evolve adaptations that enable them to survive environmental condi...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Significant increase in toxicity of the Cry1Ac1 protein of Bacillus thuringiensis by the exchange of two amino acids in its domain III
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Yaritza Reinoso-Pozo, Ma. Cristina Del Rincón-Castro, Jorge E. IbarraAbstractThe LBIT-1200 strain of Bacillus thuringiensis was recently isolated from soil, and showed high biochemical and genetic similarities with the HD-73 standard strain, besides expressing only a Cry1Ac protein: Cry1Ac39. However, LBIT-1200 was 6.4 and 9.5 times more toxic against Manduca sexta and Trichoplusia ni larvae, respectively, than HD-73, which expresses the Cry1Ac1 protein. Sequencing of Cry1Ac1 and Cry1Ac39 proteins showed only four amino acid differences, ...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Invasive Leptocybe spp. and their natural enemies: Global movement of an insect fauna on eucalypts
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Ngoc Hoan Le, Helen F. Nahrung, Manon Griffiths, Simon Andrew LawsonAbstractThe Eulophidae genus Leptocybe Fisher and La Salle and its type species L. invasa was first described in 2004 as an invasive galling pest causing serious damage to young eucalypts in the Middle East and Mediterranean. Believed to be of Australian origin, two cryptic species of Leptocybe have established throughout the world at an unprecedented rate. Australian parasitoids have been collected and released overseas for classical biocontrol of Leptocybe spp., some of which ...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Interaction dynamics between endophytic biocontrol agents and pathogen in the host plant studied via quantitative real-time polymerase chain reaction (qPCR) approach
This study represents the first report on the simultaneous monitoring of pathogen and endophytic BCA in a host plant model via real-time PCR.Graphical abstract (Source: Biological Control)
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Lipopeptides from Bacillus sp. EA-CB0959: Active metabolites responsible for in vitro and in vivo control of Ralstonia solanacearum
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Valeska Villegas-Escobar, Lina María González-Jaramillo, María Ramírez, Ruth Natalia Moncada, Laura Sierra-Zapata, Sergio Orduz, Magally Romero-TabarezAbstractBroadening the spectrum of action of microbial bioactive compounds is a priority nowadays. From a collection of 1493 aerobic endospore forming bacteria, 3.1% (47) inhibited Serratia marcescens and were highly active against R. solanacearum. Thirty-six of these strains were identified as part of the ‘Operational Group B. amyloliquefaciens’, denoting t...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Compost as a carrier medium for entomopathogenic nematodes – The influence of compost maturity on their virulence and survival
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Gisèle L. Herren, Isabelle Binnemans, Lisa Joos, Nicole Viaene, Ralf-Udo Ehlers, Bart Vandecasteele, Wim Bert, Hanne SteelAbstractThe effectiveness of entomopathogenic nematodes (EPN) against pest insects is largely dependent on the method of application and nematode survival under field conditions. Nematodes must persist long enough to control pest populations, despite sensitivity to abiotic factors such as desiccation and UV light. Here we investigate the use of compost as a carrier medium for the entomopathogenic nematode Steinernema f...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

The potential for using entomopathogenic nematodes and fungi in the management of the maize weevil, Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae)
Publication date: October 2018Source: Biological Control, Volume 125Author(s): George N. Mbata, Cleveland Ivey, David Shapiro-IlanAbstractMaize (Zea mays L.) is an important cereal crop that is cultivated globally. In storage, maize is infested by the maize weevil (Sitophilus zeamais Motchulsky). In sub-Saharan Africa where maize is an important staple crop, infestation by S. zeamais is severe. Chemical pesticides have been the key pest management tools for this pest but these practices come with consequences such as insect resistance to pesticides, food and environmental contamination, and depletion of non-target species....
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Antifungal and plant growth-promoting activities of Streptomyces roseoflavus strain NKZ-259
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Liming Shi, Thinn Thinn Nwet, Beibei Ge, Wenjun Zhao, Binghua Liu, Hailan Cui, Kecheng ZhangAbstractBiocontrol approach, using beneficial microorganisms, is becoming an important alternative to the use of chemical fungicides to control crop diseases. Therefore there is a need to found new effective biocontrol agents. Herein, a bacterial strain named NKZ-259 was isolated from soil samples obtained from Qilian Mountain, Qinghai, using the dilution plate method and streak plate technique. Strain NKZ-259 was identified as Streptomyces roseoflavus ba...
Source: Biological Control - July 11, 2018 Category: Biology Source Type: research

Metschnikowia citriensis sp. nov., a novel yeast species isolated from leaves with potential for biocontrol of postharvest fruit rot
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Ye Liu, Shixiang Yao, Lili Deng, Jian Ming, Kaifang ZengAbstractTwo strains representing a yeast species of Metschnikowia were isolated from the surface of citrus leaves collected in Chongqing Province, China. Preliminary tests showed that this species has a biocontrol potential for inhibiting citrus green mold. This yeast species is most closely related to Metschnikowia koreensis based on the phylogenetic tree derived from neighbour-joining analysis of 26S rRNA gene D1/D2 domain. However, M. koreensis differs from this species by seven (1.5%) 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 10, 2018 Category: Biology Source Type: research

Challenges to Conservation Biological Control on the High Plains: 150 Years of Evolutionary Rescue
Publication date: Available online 5 July 2018Source: Biological ControlAuthor(s): J.P. MichaudAbstractConservation biological control (CBC) makes valuable contributions to productivity in High Plains agriculture. Despite some notable exceptions, CBC holds a wide range of potentially damaging pests under natural control, largely due to the actions of beneficial arthropod species that have endured more than a century of forced adaptation to an increasingly industrialized agricultural landscape. 'Evolutionary rescue' is a natural selection process whereby species evolve adaptations that enable them to survive environmental c...
Source: Biological Control - July 6, 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 6, 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 6, 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 6, 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 6, 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 6, 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 6, 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 6, 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 6, 2018 Category: Biology Source Type: research

Biological control of Salvinia molesta in South Africa revisited
Publication date: Available online 23 June 2018Source: Biological ControlAuthor(s): G.D. Martin, J.A Coetzee, P.S.R. Weyl, M.C. Parkinson, M.P. HillAbstractThe aquatic weed Salvinia molesta D.S. Mitch. (Salviniaceae) was first recorded in South Africa in the early 1900s, and by the 1960s was regarded as one of South Africa’s worst aquatic weeds. Following the release of the weevil, Cyrtobagous salviniae Calder and Sands (Coleoptera: Curculionidae) in 1985, the weed is now considered under successful biological control. However, the post-release evaluation of this biological control programme has been ad hoc, therefor...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Editorial Board
Publication date: September 2018Source: Biological Control, Volume 124Author(s): (Source: Biological Control)
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Microbiota from ‘next-generation green compost’ improves suppressiveness of composted Municipal-Solid-Waste to soil-borne plant pathogens
In this study, the pathogen-specific property of commercial composts to suppress Fusarium oxysporum f. sp. melonis wilt on melon has been enhanced transferring the multi-suppressive properties from seven ‘next-generation green composts’ made of agro-industrial residues and plant green-waste, including the steam-explosion liquid wastes derived from a 2nd-generation fuel ethanol production chain, into two composts made of Municipal-Solid-Waste (MSW) and one made of cow manure-household waste. After determination either of the physical-chemical features and suppressive properties of the starting composts, either o...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Plant identity, but not diversity, and agroecosystem characteristics affect the occurrence of M. robertsii in an organic cropping system
Publication date: September 2018Source: Biological Control, Volume 124Author(s): Puneet K. Randhawa, Christina Mullen, Mary BarbercheckAbstractOrganic farmers rely largely on cultural practices, such as crop rotation and cover cropping, and on biological control to manage pests. Winter cover crops add diversity to agroecosystems and can benefit soil conservation and health, retention and supply of soil nutrients, regulation of arthropods, and crop yields. Within the framework of a three-year experiment to investigate ecosystem services and disservices associated with 12 winter cover crop treatments during the transition of...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Bioclimatic analyses of Trichomalus perfectus and Mesopolobus morys (Hymenoptera: Pteromalidae) distributions, two potential biological control agents of the cabbage seedpod weevil in North America
This study showed that variation in regional distributions may occur and these are likely based on differing tolerance to climatic conditions. Understanding these tolerances can enhance precision of ecological niche models that predict potential distributions of parasitoids for introduction as candidate biological control agents. Furthermore, the work reported here provides a basis for future research to determine if climate change may favour species such as M. morys that are adapted to warmer summer conditions.Graphical abstract (Source: Biological Control)
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Effect of cold storage of Corcyra cephalonica eggs on the fitness for Trichogramma chilonis
In this study, we investigated the physicochemical property of fresh rice moth eggs (U) and sterilized eggs cold-stored at 4 °C for 0 (CK), 15 (N15), 30 (N30), 45 (N45), and 60 (N60) days and evaluated the effect of cold storage of host eggs on the fitness of T. chilonis. The results showed that the moisture content, dry matter and pH of C. cephalonica eggs decreased significantly with increasing cold storage time. The survival rates of T. chilonis embryos, larvae and pupae decreased significantly when C. cephalonica eggs were cold-stored for more than 15 days. The fecundity rate of adult T. chilonis in refrigera...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Optimization of bio-insecticide production by Tunisian Bacillus thuringiensis israelensis and its application in the field
In conclusion, BUPM98, a local strain of B. thuringiensis israelensis, is very promising bioinsecticide for mosquito population management in Tunisia. (Source: Biological Control)
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Isolation of indigenous antagonistic microorganism to inhibit Rigidoporus microporus and other plant pathogens and analysis of the bioactive compounds
This study indicates that T. asperellum F14 can be used to inhibit white root rot disease and other plant diseases. (Source: Biological Control)
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Rizhospheric competence, plant growth promotion and biocontrol efficacy of Bacillus amyloliquefaciens subsp. plantarum strain 32a
This study aimed to further define the taxonomic position of strain 32a, previously identified as a B. amyloliquefaciens, to evaluate its rhizosphere competence and its persistence in the rhizoplane of tomato and to assess its potential as growth promoting and biocontrol agent towards crown gall disease. The gyrB gene sequencing of strain 32a classified it as subsp. plantarum. This strain harbored genes related to the production of the dipeptide bacilysin and the polyketides macrolactin, bacillaene and difficidin. When tested in vitro, it was also able to produce siderophore, hydrolytic enzymes and indole-3-acetic acid and...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Biological control of boxwood blight by Pseudomonas protegens recovered from recycling irrigation systems
In this study, 1547 bacterial strains recovered from recycling irrigation systems were evaluated in vitro and in planta for their biological control efficacy against Cps. Three most potent stains 13A3, 14D5, and 34B6 identified all belonged to Pseudomonas protegens. Strains 13A3 and 14D5 reduced Cps mycelial growth by 95 to 100% in two sets of in vitro experiments including a 48-well plate assay and a dual culture assay. Strain 34B6 also reduced Cps growth by 93% in the 48-well plate assay and 66 to 72% in dual culture plates. In planta, strain 14D5 reduced Cps infection by more than 50%, while strains 13D3 and 34B6 by 40 ...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

The effects of prey distribution and digestion on functional response of Harmonia axyridis (Coleoptera: Coccinellidae)
Publication date: September 2018Source: Biological Control, Volume 124Author(s): Yi Feng, Zhao-Xu Zhou, Meng-Ru An, Xing-Lin Yu, Tong-Xian LiuAbstractThe effects of prey distribution and digestion on the functional response of an invertebrate predator Harmonia axyridis (Pallas) to varying densities of Aphis citricola (van der Goot) were investigated. Experiments were conducted in petri dish and wind tunnels with multiple plants to present conditions in which the predator could behave more naturally. To discriminate if the functional response of H. axyridis is digestion or handling limited, numbers of aphids consumed were m...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Biotic aspects involved in the control of damping-off producing agents: The role of the thermotolerant microbiota isolated from composting of plant waste
Publication date: September 2018Source: Biological Control, Volume 124Author(s): N. Sánchez San Fulgencio, F. Suárez-Estrella, M.J. López, M.M. Jurado, J.A. López-González, J. MorenoAbstractAlong with the high temperatures generated during the composting process, the microbial community of a compost pile collaborates actively in the control of damping-off producing agents. Such collaboration could be justified on the basis of the ability of the microbiota to produce fungicide substances that are involved in the control of damping-off or other bioactive compounds that affect the growth pro...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Chitosan and Pichia membranaefaciens control anthracnose by maintaining cell structural integrity of citrus fruit
Publication date: September 2018Source: Biological Control, Volume 124Author(s): Yijie Zhao, Lili Deng, Yahan Zhou, Shixiang Yao, Kaifang ZengAbstractThis work evaluated effects of chitosan and Pichia membranaefaciens treatments on anthracnose control of cell membrane and cell wall structure in citrus fruit (Citrus sinensis L. Osbeck). Pathogen infection can cause cell membrane destruction and cell wall degradation. The disease incidence and lesion diameter on chitosan- and P. membranaefaciens- treated citrus was significantly reduced, especially P. membranaefaciens. Moreover, those treatments all could regulate reactive o...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Pre-selection in laboratory tests of survival and competition before field screening of antagonistic bacterial strains against Botrytis bunch rot of grapes
Publication date: September 2018Source: Biological Control, Volume 124Author(s): Carlos Calvo-Garrido, Rana Haidar, Jean Roudet, Thomas Gautier, Marc FermaudAbstractWith only a few biocontrol products currently registered against Botrytis bunch rot (BBR) of grapes, there is a crucial need for new antagonistic strains that are able to survive and efficiently suppress B. cinerea under vineyard conditions. The aim of this study was to establish and follow a pre-selection process among potential antagonistic bacterial strains, previously identified in vivo for efficacy, and to carry out a further field screening assay using a ...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Host utilization, reproductive biology, and development of the larval parasitoid Tetrastichus planipennisi as influenced by temperature: Implications for biological control of the emerald ash borer in North America
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Jian J. Duan, Jonathan M. Schmude, Xiao-Yi Wang, Timothy J. Watt, Leah S. BauerAbstractThe success of classical biological control programs depends in part on understanding climate effects on introduced agents. Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae), a larval endoparasitoid of emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), is being introduced to EAB-invaded regions of the United States (USA) and Canada for biological control. To optimize regional release strategies and increase efficiency of t...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Significant increase in toxicity of the Cry1Ac1 protein of Bacillus thuringiensis by the exchange of two amino acids in its domain III
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Yaritza Reinoso-Pozo, Ma. Cristina Del Rincón-Castro, Jorge E. IbarraAbstractThe LBIT-1200 strain of Bacillus thuringiensis was recently isolated from soil, and showed high biochemical and genetic similarities with the HD-73 standard strain, besides expressing only a Cry1Ac protein: Cry1Ac39. However, LBIT-1200 was 6.4 and 9.5 times more toxic against Manduca sexta and Trichoplusia ni larvae, respectively, than HD-73, which expresses the Cry1Ac1 protein. Sequencing of Cry1Ac1 and Cry1Ac39 proteins showed only four amino acid differences, ...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Invasive Leptocybe spp. and their natural enemies: Global movement of an insect fauna on eucalypts
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Ngoc Hoan Le, Helen F. Nahrung, Manon Griffiths, Simon Andrew LawsonAbstractThe Eulophidae genus Leptocybe Fisher and La Salle and its type species L. invasa was first described in 2004 as an invasive galling pest causing serious damage to young eucalypts in the Middle East and Mediterranean. Believed to be of Australian origin, two cryptic species of Leptocybe have established throughout the world at an unprecedented rate. Australian parasitoids have been collected and released overseas for classical biocontrol of Leptocybe spp., some of which ...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Metschnikowia citriensis sp. nov., a novel yeast species isolated from leaves with potential for biocontrol of postharvest fruit rot
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Ye Liu, Shixiang Yao, Lili Deng, Jian Ming, Kaifang ZengAbstractTwo strains representing a yeast species of Metschnikowia were isolated from the surface of citrus leaves collected in Chongqing Province, China. Preliminary tests showed that this species has a biocontrol potential for inhibiting citrus green mold. This yeast species is most closely related to Metschnikowia koreensis based on the phylogenetic tree derived from neighbour-joining analysis of 26S rRNA gene D1/D2 domain. However, M. koreensis differs from this species by seven (1.5%) s...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Lipopeptides from Bacillus sp. EA-CB0959: Active metabolites responsible for in vitro and in vivo control of Ralstonia solanacearum
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Valeska Villegas-Escobar, Lina María González-Jaramillo, María Ramírez, Ruth Natalia Moncada, Laura Sierra-Zapata, Sergio Orduz, Magally Romero-TabarezAbstractBroadening the spectrum of action of microbial bioactive compounds is a priority nowadays. From a collection of 1493 aerobic endospore forming bacteria, 3.1% (47) inhibited Serratia marcescens and were highly active against R. solanacearum. Thirty-six of these strains were identified as part of the ‘Operational Group B. amyloliquefaciens’, denoting t...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

Compost as a carrier medium for entomopathogenic nematodes – The influence of compost maturity on their virulence and survival
Publication date: October 2018Source: Biological Control, Volume 125Author(s): Gisèle L. Herren, Isabelle Binnemans, Lisa Joos, Nicole Viaene, Ralf-Udo Ehlers, Bart Vandecasteele, Wim Bert, Hanne SteelAbstractThe effectiveness of entomopathogenic nematodes (EPN) against pest insects is largely dependent on the method of application and nematode survival under field conditions. Nematodes must persist long enough to control pest populations, despite sensitivity to abiotic factors such as desiccation and UV light. Here we investigate the use of compost as a carrier medium for the entomopathogenic nematode Steinernema f...
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research

The potential for using entomopathogenic nematodes and fungi in the management of the maize weevil, Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae)
Publication date: October 2018Source: Biological Control, Volume 125Author(s): George N. Mbata, Cleveland Ivey, David Shapiro-IlanAbstractMaize (Zea mays L.) is an important cereal crop that is cultivated globally. In storage, maize is infested by the maize weevil (Sitophilus zeamais Motchulsky). In sub-Saharan Africa where maize is an important staple crop, infestation by S. zeamais is severe. Chemical pesticides have been the key pest management tools for this pest but these practices come with consequences such as insect resistance to pesticides, food and environmental contamination, and depletion of non-target species....
Source: Biological Control - July 6, 2018 Category: Biology Source Type: research