Download Biodiversity and Pest Management in Agroecosystems by Clara Nicholls PDF

By Clara Nicholls

Discover the most recent study on organic keep an eye on! thoroughly up-to-date for 2004, this new version examines equipment for making agricultural platforms much less liable to insect pests. Containing new findings and studies of ideas, Biodiversity and Pest administration in Agroecosystems, moment version will express you ways pests could be controlled through bettering worthwhile biodiversity utilizing agroecological diversification tools. Biodiversity and Pest administration in Agroecosystems, moment version provide you with a vital review of the function of biodiversity in agriculture after which will get particular, with new and up-to-date details on: the agroecology of pest administration plant range and pest outbreaks inside agroecosystems diversification techniques for pest administration how sustainable farming structures are designed you will additionally discover: the position of plant variety at the biology of important bugs insect rules in varied agroecosystems manipulation of plant range in agroecosystems ecological and socioeconomic implications in point of fact, many glossy agroecosystems are volatile on account of consistent human intervention in crop platforms which forget about ecological ideas. With case stories on a number of plants and pests, Biodiversity and Pest administration in Agroecosystems, moment version explores entomological facets of agriculture and analyzes the ecological foundation for the upkeep of biodiversity. it is going to familiarize you with the speculation and perform of bettering organic pest regulate in agricultural structures through dealing with vegetational variety through a number of cropping, conceal cropping, rotations, and different spatial and temporal designs. With stories on intercropping, disguise cropping, weed administration, and crop-field border plants manipulation, this ebook covers the results of those assorted structures on pest inhabitants density and the mechanisms underlying pest aid in polycultures. Make it part of your reference/teaching assortment this day!

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Additional resources for Biodiversity and Pest Management in Agroecosystems

Sample text

Expected population response (egg densities) of the whiteflies Aleurotrachelus socialis and Trialeurodes variabilis in cassava and cowpea mixtures in Colombia (after Altieri, 1991a). broccoli plants grown in monocultures than in polycultures but not so on a per-plot basis. The differences in beetle abundance on a perplant basis were basically due to the fact that the beetles concentrated more on wild mustard than on broccoli in the mixture. This preference has a chemical basis since wild mustard has higher concentrations of glucosinolates than does broccoli, a strong beetle attractant.

Functional grouping is essential for devising appropriate management strategies. Five criteria can be used to classify agroecosystems in a region: 1. The types of crop and livestock 2. The methods used to grow the crops and produce the stock 3. The relative intensity of use of labor, capital, and organization, and the resulting output of product 4. The disposal of the products for consumption (whether used for subsistence or supplement on the farm or sold for cash or other goods) 5. 1. Agriculture as a hierarchy of systems (after Hart, 1980).

3. Main Findings and Conclusions of Reviews of Enemy Hypothesis (NE) and Resource Concentration (RC) Hypothesis Review Main Findings Main Conclusions Risch et al. (1983) 150 studies, 198 herbivore species. “Diverse” systems: herbivore populations lower in 58 percent of cases, higher in 18 percent, no change in 9 percent, and variable in 20 percent. , host-plant finding behavior, predation rate, etc. Risch (1981) Review of mechanisms. Resource concentration hypothesis in annual systems, natural enemies in perennial systems.

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