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"BIOLOGICAL CONTROL ORGANISMS"
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Bioassays of entomopathogenic microbes and nematodes
This volume provides background theory and practical protocols for bioassays of bacteria, viruses, fungi, microsporidia and nematodes that can be used as biological control agents against insect pests of agricultural and medical importance. In addition, experimental design and statistics, computational modelling for bioassay analysis, and relevant legislation are described. With contributions from internationally recognised scientists from their respective fields, this book will be of particular value to researchers both experienced and inexperienced in this area.
eBook
Cull of the wild : killing in the name of conservation
Taking a balanced and open approach to this emotive subject, Hugh speaks to experts on all sides of the debate. How do we protect endangered native species? Which species do we prioritise? And how do we reckon with the ethics of killing anything in the name of conservation?
Book
Nematodes as biocontrol agents
This book documents and illustrates major developments in the use of nematodes for the biological control of insects and slugs. It covers the use of three main types of nematodes: entomopathogenic nematodes, entomophilic nematodes and slug-parasitic nematodes. The biology, commercial production, formulation and quality control, application technology, strategy and safety of each of these three nematode groups is discussed. The book also examines the application of nematodes in different cropping systems, and the efficacy of nematodes against specific pests. The potential of predatory nematodes to control plant-parasitic nematodes and mycophagous nematodes to control fungal pathogens is also reviewed.
eBook
Environmental impact of invertebrates for biological control of arthropods: methods and risk assessment
This book provides an invaluable review of the current methodologies used for assessing the environmental impacts of invertebrate biological agents used to control pests in agriculture and forestry. It explores methods to evaluate post-release effects and the environmental impact of dispersal, displacement and establishment of invertebrate biological control agents. It covers methodology on screening for contaminants, the use of molecular methods for species identification and the determination of interbreeding. The book also discusses the use and application of information on zoogeographical zones, statistical methods and risk-benefit analysis. It gives practical advice on how to perform science-based risk assessments and on how to use new technology and information.
eBook
BIOLOGICAL CONTROL OF WEEDS
Classical biological control, i.e. the introduction and release of exotic
insects, mites, or pathogens to give permanent control, is the predominant
method in weed biocontrol. Inundative releases of predators and integrated pest
management are less widely used. The United States, Australia, South Africa,
Canada, and New Zealand use biocontrol the most. Weeds in natural ecosystems
are increasingly becoming targets for biocontrol. Discussion continues on agent
selection, but host-specificity testing is well developed and reliable.
Post-release evaluation of impact is increasing, both on the target weed and on
non-target plants. Control of aquatic weeds has been a notable success. Alien
plant problems are increasing worldwide, and biocontrol offers the only safe,
economic, and environmentally sustainable solution.
Journal Article
Optimizing Biocontrol Activity of Paenibacillus xylanexedens for Management of Hairy Root Disease in Tomato Grown in Hydroponic Greenhouses
Hairy root disease (HRD) caused by rhizogenic Agrobacterium biovar 1 strains affect tomato, cucumber, eggplant, and bell pepper grown in hydroponic greenhouses and can cause considerable yield losses worldwide. Recently, Paenibacillus xylanexedens strains (ST15.15/027 and AD117) with antagonistic activity against rhizogenic agrobacteria were identified. In this study, we present results of greenhouse trials of two consecutive growing seasons (2019 and 2020) to examine the potential of these two biocontrol organisms (BCOs) under practical conditions. BCO-treatment at a 107 colony forming units (CFU)/mL density resulted in a considerable reduction of the HRD infestation rate, confirming the biocontrol potential of the two P. xylanexedens strains. Results revealed that a single BCO strain (ST15.15/027) performed equally well as the mixed inoculum of both strains. The same level of biocontrol activity was even achieved when the BCO inoculum density was reduced to 105 CFU/mL. qPCR analysis further showed that Paenibacillus was still present in rockwool substrate near the end of both trials, indicating that they persist well in a rockwool environment and that application at the start of the trial is sufficient to protect tomato plants until the end of the trial. Altogether, these results are highly valuable for further optimization and exploitation of P. xylanexedens as a biocontrol product for the control of HRD in hydroponic greenhouses.
Journal Article