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目前在华北棉区推广防治二代棉铃虫的综合防治技术措施主要是依据防治指标施药。久效磷滴心,菊脂类农药一次性施药防治。这些综防技术措施的出发点是旨在协调生物防治与化学防治的矛盾,充分保护利用棉田天敌。1990年全国植保总站在山东定陶县棉田布点进行对比试验,检验这些技术措施的经济合理性与实用性。一、试验方法1.种植制:棉花栽培品种为中棉12,春直播,亩株数2281,土壤肥力中等。2.试验设计:小区面积0.3亩(200m~2),棉田内划分12小区。处理①按防治指标40%久效磷1500倍液手动喷雾器常量喷
Currently in North China cotton area to promote the prevention and treatment of the second generation of cotton bollworm comprehensive prevention and control technology measures are mainly based on control indicators spraying. Monocrotophos drop heart, chrysanthemum pesticides a one-time application prevention and treatment. The starting point of these comprehensive preventive measures is to coordinate the contradiction between biological control and chemical control and to fully protect and utilize natural enemies in cotton fields. The National Plant Protection Station in 1990, Dingtao County, Shandong Cotton Field cloth comparative tests to test the economic rationality and practicality of these technical measures. First, the test method 1. Planting system: cotton cultivars in cotton 12, direct seeding, mu number 2281, medium fertility. 2. Experimental Design: Community area 0.3 acres (200m ~ 2), divided into 12 areas within the cotton field. Treatment ① according to the control index 40% monocrotophos 1500 times manual spray constant spray