Journal of Food, Agriculture and Environment
Vol 10,
Issue 2,2012
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Pest control by enriching natural enemies under artificial habitat management along sidewalls of greenhouse in organic farming systems
Author(s):
Qicong Xu 1,
Shizuo Fujiyama 1, Huilian Xu 2Recieved Date: 2012-01-18, Accepted Date: 2012-04-27
Abstract:Biodiversity in agricultural systems is increasingly important in integrated pest management in organic crop production. Habitat management is a strategy aiming at enriching the biodiversity and favoring natural enemies in agricultural systems. However, the peak of the dynamically changing population of natural enemies must cope with that of pests for effective control. Therefore, in the present study the dynamic relations between pests and natural enemies under the conservation practices were clarified by a habitat manage experiment. Plant residuals were mulched along the walls of the greenhouse as habitat for the natural enemies such as spiders and carabids before the pests appeared in the plots, where a cabbage crop was intercropped into a tomato crop. During the growth period of crops, the density of pests and predators were examined and analyzed with mathematic model as P1=PB1+ {Pmax-PB1-PY1[1-β1(t-τ)2]} EXP[-α1(t-τ)2] +PY1[1-β1(t-τ)2] (t≤τ) and P2 = PB2+{Pmax-PB2-PY2[1-β2 (t-τ)2]} EXP [-α2(t-τ)2]+PY2 [1-β2 (t-τ)2] (t≥τ). It was concluded that the habitat management for natural enemies with plant residues placed along the walls in greenhouses favored natural enemies, especially before the appearance of pest insect, and controlled the pests effectively to a lower level.
Keywords:Biological pest control,
intercropping, IPM, mathematic modeling, population dynamics, natural enemies, nature farmingJournal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 2
Category: Agriculture
Pages: 449-458
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