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Download Control of Pests and Weeds by Natural Enemies: An by Roy van Driesche, Mark Hoddle, Ted Center PDF

By Roy van Driesche, Mark Hoddle, Ted Center

Organic keep an eye on – using a inhabitants of normal enemies to seasonally or completely suppress pests – isn't really a brand new proposal. The cottony cushion scale, which almost destroyed the citrus of California, used to be managed via an brought predatory insect within the Eighteen Eighties. sped up invasions by way of bugs and unfold of weedy non-native crops within the final century have elevated the necessity for using organic keep an eye on. Use of conscientiously selected average enemies has turn into an enormous device for the safety of ordinary ecosystems, biodiversity and agricultural and concrete environments.This e-book bargains a multifaceted but built-in dialogue on significant functions of organic keep an eye on: everlasting regulate of invasive bugs and crops on the panorama point and transitority suppression of either local and unique pests in farms, tree plantations, and greenhouses. Written via prime overseas specialists within the box, the textual content discusses regulate of invasive species and the position of common enemies in pest management.This ebook is vital examining for classes on Invasive Species, Pest administration, and Crop security. it really is a useful reference publication for biocontrol execs, restorationists, agriculturalists, and flora and fauna biologists.Further details and assets are available at the Editor’s personal site at: www.invasiveforestinsectandweedbiocontrol.info/index.htm

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Introductions of such mosquito fish, however, can damage native fish populations through competition or hybridization (Arthington & Lloyd 1989, Courtenay & Meffe 1989). MAJOR GROUPS OF PREDATORY INSECTS Predaceous insects of potential use in biological control are found in Dermaptera, Mantodea, Hemiptera, Thysanoptera, Coleoptera, Neuroptera, Hymenoptera, and Diptera (Hagen et al. 1976, Triplehorn & Johnson 2005), with Hemiptera, Coleoptera, Hymenoptera, and Diptera being most important. More than 30 families of insects are predaceous and, of these, the Anthocoridae, Nabidae, Reduviidae, Geocoridae, Carabidae, Coccinellidae, Nitidulidae (sensu Cybocephalidae), Staphylinidae, Chrysopidae, Formicidae, Cecidomyiidae, and Syrphidae are commonly important in crops.

These behaviors increase the number of parasitoids on a host patch and the average time spent there (Prokopy & Webster 1978, Vet 1985, Nealis 1986). Host feeding damage causes the braconid Cotesia rubecula (Marshall) to remain longer on infested cabbages (Nealis 1986). qxd 1/25/08 10:21 AM Page 19 Chapter 3 Parasitoid diversity and ecology (a) Edge of cabbage leaf disk Direction of travel 19 1978), a change from straight-line walking to paths that loop back often (Waage 1979, Loke & Ashley 1984, Kainoh et al.

External parasitism, however, is largely restricted to leaf- or stem-miners, borers, pupae in cocoons, or gall makers, where some physical structure keeps parasitoid larvae and hosts together. qxd 1/25/08 10:21 AM Page 24 24 Part 2 Kinds of natural enemies In contrast, internal parasitism allows use of unconcealed hosts such as caterpillars, aphids, or mealybugs. Also, internal parasitism of larvae or nymphs permits hosts to grow before death. Internal parasitoids, however, risk encapsulation. Some species evade this hazard by attacking the host egg, which lacks an immune system, or by inserting eggs into ganglia, where encapsulating blood cells have no access (Hinks 1971, Godfray 1994), although this is not a complete strategy, as they must eventually leave the ganglion to develop.

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