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棉铃虫是我区棉花蕾铃期主要害虫。1970年以来,危害严重,有时防治失时,造成大量蕾铃脱落、僵瓣、烂桃,严重影响棉花产量和品质。为提高测报技术和防治效果,有效地控制棉铃虫为害,我们于1973、1974两年,对棉铃虫进行了定点系统观察和田间调查。现就积累的一些资料,简结如下: 一、成虫发生消长情况 (一)各代成虫的发生期:1974年第一代成虫于6月7日始见,6月22日进入高峰期,比1973年第一代成虫始见期和高峰期分别迟2天和4天。1974年第二、三代成虫高
Cotton bollworm is our region cotton bud bolling stage major pests. Since 1970, the serious harm, and sometimes prevention and treatment of lost time, resulting in a large number of buds fall off, petal, rotten peach, seriously affecting the yield and quality of cotton. In order to improve the technique of reportage and the effect of controlling and effectively controlling the damage of cotton bollworm, we conducted the fixed-point systematic observation and the field investigation on the cotton bollworm in 1973 and 1974. Now on the accumulation of some of the information is summarized as follows: First, the growth and decline of adult occurrence (A) the occurrence of each generation of adult worms: the first generation of adults in 1974 saw on June 7, June 22 into the peak than The first generation of adults in 1973, the initial and peak late two days and four days respectively. 1974 second, third generation of adult high