针对棉花害虫现状改善综合防治结构

１９９２年以来棉铃虫在全国主要棉区的连续暴发为害和对菊酯类农药的抗性迅速发展以及某些地方因耕作制的变化而引发的新害虫如玉米暝、盲蝽转害棉花等问题，需要进一步改善棉花害虫的综合防治结构，以便能够稳定地控制多种害虫的为害，建议对耕作制的改变作合理评估以作取利避害的选择，重视农业防治，利用植物生长调节剂和诱导作物及棉株的抗逆补偿能力来调控害虫的发生，保护自然天敌，选用非广谱性农药和生物农药，改进农药的使

Improving the IPM System of Cotton Based on the present Pest Status

ue to the outbreak of cotton bollworm Helicoverpa armigera in 1992 and successive years in the main cotton growing area and rapid developrnent of pyrethroids-resistant bollworm as well as some new pests such as corn borer Ostrinia furnacalis and mirid bugs Adelphocoris sp. were developed to infest the cotton during the changing of cropping system, the IPM system of cotton is urged for improving. The statement of rational evaluation of new cropping systern for its advantages and to avoid its draw backs is suggested. The methods of pest control. applying plant growth regulator, inducing the compensatory ability of cotton plant after being damaged can be applied in the IPM system. Protecting nature enemies and applying non-broad spectrum pesticides or biological pesticides are promoted and the management of pesticides is emphysized. Sorne new control measures such as cotton varieties of bollworm resistant. insect pheromones and some specific pesticides of environmental safty as chlorfluazur-on,abamectin. mistac are tested and under demonstration.