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Control of Pests and Weeds by Natural Enemies


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Table of Contents

Preface. Part I: Scope of biological control. 1. Introduction. 2. Types of biological control, targets, and agents. What is biological control?. Permanent control over large areas. Temporary pest suppression in production areas. Kinds of targets and kinds of agents. Part II: Kinds of natural enemies. 3. Parasitoid diversity and ecology. What is a parasitoid?. Terms and processes. Some references to parasitoid families. Groups of parasitoids. Finding hosts. Host recognition and assessment. Defeating host defenses. Regulating host physiology. Patch-time allocation. 4. Predator diversity and ecology. Non-insect predators. Major groups of predatory insects. Overview of predator biology. Predator foraging behavior. Predators and pest control. Effects of alternative foods on predator impact. Interference of generalist predators with classical biological control agents. Predator and prey defense strategies. 5. Weed biocontrol agent diversity and ecology. The goal of weed biological control. Terms and processes. Herbivory and host finding. Herbivore guilds. Groups of herbivores and plant pathogens. 6. Arthropod pathogen diversity and ecology. Bacterial pathogens of arthropods. Viral pathogens of arthropods. Fungal pathogens of arthropods. Nematodes attacking arthropods. Generalized arthropod pathogen life cycle. Epidemiology: what leads to disease outbreaks?. Part III: Invasions: why biological control is needed:. 7. The invasion crisis. Urgency of the invasion crisis. Case histories of four high-impact invaders. The extent of harmful impact by invaders. How do invasive species get to new places?. Why do some invasions succeed but others fail?. Invader ecology and impact. 8. Ways to suppress invasive species. Prevention: heading off new invasions through sound policy. Eradication based on early detection. Invaders that do no harm. Control of invasive pests in natural areas. Factors affecting control in natural areas. Control of invasive species in crops. Part IV: Natural enemy introductions: theory and practice. 9. Interaction webs as the conceptual framework for classical biological control. Terminology. Forces setting plant population density. Forces setting insect population density. Predictions about pests based on food webs. 10. The role of population ecology and population models in biological control: Joseph Elkinton (University of Massachusetts). Basic concepts. Population models. 11. Classical biological control. Introduction. Classical biological control. New-association biological control. Summary. 12. Weed biological control. Differences and similarities between weed and arthropod programs. Why plants become invasive. Selecting suitable targets for weed biological control. Conflicts of interest in weed biological control. Faunal inventories: finding potential weed biological control agents. Safety: ?will those bugs eat my roses?? Pre-release determination of efficacy. How many agents are necessary for weed control? Release, establishment, and dispersal. Evaluation of impacts. Non-target impacts. When is a project successful? Conclusions. Part V: Tools for classical biological control. 13. Foreign exploration. Planning and conducting foreign exploration. Shipping natural enemies. Operating a quarantine laboratory. Managing insect colonies in quarantine. Developing petitions for release into the environment. 14. Climate matching. Climate matching. Inductive modeling: predicting spread and incursion success. Deductive modeling: predicting spread and incursion success. Conclusions. 15. Molecular tools: Richard Stouthamer (University of California Riverside). Types of molecular data. Important biological control issues that molecular techniques can address. Conclusions. Part VI: Safety. 16. Non-target impacts of biological control agents. Biological control as an evolving technology. The amateur to early scientific period (1800?1920). A developing science makes some mistakes (1920?70). Broadening perspectives (1970?90). Current practice and concerns. ?Re-greening? biological control. 17. Predicting natural enemy host ranges. Literature records. Surveys in the native range. Laboratory testing to estimate host ranges. Interpretation of tests. Examples of host-range estimation. Risk assessment. 18. Avoiding indirect non-target impacts. Kinds of potential indirect effects. Can risk of indirect impacts be reduced by predicting natural enemy efficacy? Part VII: Measuring natural enemy impacts on pests. 19. Field colonization of natural enemies. Limitations from the agent or recipient community. Managing release sites. Quality of the release. Caging or other release methods. Persistence and confirmation. 20. Natural enemy evaluation. Natural enemy surveys in crops. Pre-release surveys for classical biological control. Post-release surveys to detect establishment and spread of new agents. Post-release monitoring for non-target impacts. Measurement of impacts on the pest. Separating effects of a complex of natural enemies. Economic assessment of biological control. Part VIII: Conserving biological control agents in crops. 21. Protecting natural enemies from pesticides. Problems with pesticides. Super pests and missing natural enemies. Dead wildlife and pesticide residues in food. Cases when pesticides are the best tool. How pesticides affect natural enemies. Seeking solutions: physiological selectivity. Pesticide-resistant natural enemies. Ecological selectivity: using non-selective pesticides with skill. Transgenic Bt crops: the ulimate ecologically selective pesticide. 22. Enhancing crops as natural enemy environments. Problem 1: unfavorable crop varieties. Solution 1: breeding natural enemy-friendly crops. Problem 2: crop fields physically damaging to natural enemies. Solution 2: cover crops, mulching, no till farming, strip harvesting. Problem 3: inadequate nutritional sources. Solution 3: adding nutrition to crop environments. Problem 4: inadequate reproduction opportunities. Solution 4: creating opportunities for contact with alternative hosts or prey. Problem 5: inadequate sources of natural enemy colonists. Solution 5: crop-field connectivity, vegetation diversity, and refuges. Other practices that can affect natural enemies. Conclusions. Part IX: Biopesticides. 23. Microbial pesticides: issues and concepts. History of microbial insecticides. What makes a pathogen a likely biopesticide?. Overview of options for rearing pathogens. Agent quality: finding it, keeping it, improving it. Measuring the efficacy of microbial pesticides. Degree of market penetration and future outlook. 24. Use of arthropod pathogens as pesticides. Bacteria as insecticides. Fungi as biopesticides. Viruses as insecticides. Nematodes for insect control. Safety of biopesticides. Part X: Augmentative biological control. 25. Biological control in greenhouses. Historical beginnings. When are greenhouses favorable for biological control?. Natural enemies available from the insectary industry. Growers? commitment to change. Requirements for success: efficacy and low cost. Methods for mass rearing parasitoids and predators. Practical use of natural enemies. Programs with different biological control strategies. Integration of multiple biocontrol agents for several pests. Safety of natural enemy releases in greenhouses. 26. Augmentative release of natural enemies in outdoor crops. Trichogramma wasps for moth control. Use of predatory phytoseiid mites. Control of filth flies. Other examples of specialized agents. Generalist predators sold for non-specific problems. Part XI: Other targets and new directions. 27. Vertebrate pests. Predators as vertebrate control agents. Parasites as vertebrate control agents. Pathogens as vertebrate control agents. New avenues for biological control of vertebrates. Conclusions. 28. Expanding the biological control horizon: new purposes and new targets. Targeting weeds and arthropod pests of natural areas. Targeting ?non-traditional? invasive pests. Conclusions. 29. Future directions. Classical biological control. Conservation biological control. Augmentation biological control. Biopesticides. Conclusions. References. Index

About the Author

Roy Van Driesche, University of Massachusetts, is an expert in biological control in the Entomology Division of the University of Massachusetts at Amherst. An earlier book on this topic by Van Driesche was published in 1996 as well as one on the invasive species problem. He is currently working to resolve the threat to eastern hemlock (a native forest tree) posed by an invasive Japanese adelgid. Mark Hoddle, University of California, Riverside, has written numerous articles and edited conference proceedings on biocontrol. He has recently successfully controlled the glassy wing sharpshooter in French Polynesia with introduced egg parasitoids. Ted Center, US Department of Agriculture, Agriculture Research Service, is a world leader in biological control of invasive plants, in particular against the world?s worst water weed, waterhyacinth, and against melaleuca, an invasive Australian tree threatening the survival of the Florida Everglades, a World Heritage site.


?This text will be valued by students, biocontrol professionals, farmers, and ecologists concerned with invasive species and pest management.? (Southeastern Naturalist, July 2008) "Valuable for upper-level curricula and as a reference course ? Highly recommended." (CHOICE, January 2009)

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