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近几年来,我省广大贫下中农,在毛主席革命路线指引下,积极开展“农业学大寨”运动,大搞以间作套种为主要内容的种植革命,有力地促进了农业生产的发展,粮棉产量迅速增加。随着环境条件的改变,害虫的发生也有明显变化,有的受到抑制,有的则发生严重。棉铃虫是属于发生严重的一类,是当前棉花增产的主要障碍之一。 解放初期,我省棉铃虫主要集中在局部丰产棉田,自1957年以后,发生面积逐渐扩大,虫量增加,为害日趋严重。据成安县15年资料记载:1953年棉铃虫发生面积仅占植棉面积的0.26％,1958年扩大到57.1％,1970年以后基本扩大到全部棉田。1958年第二代棉田百株卵量仅21粒,百株幼虫4头,1973年百株卵量增加到278粒,严重地块达千粒以上,百株幼虫增加到118头,比1958年分别增加了13.2倍和29.5倍。同时,麦类、豆
In recent years, with the guidance of Chairman Mao’s revolutionary line, the vast majority of poor and middle-level peasants in our province, under the guidance of Chairman Mao’s revolutionary line, have actively carried out the campaign of "learning from agriculture in Dazhai and vigorously promoted the cultivation revolution with intercropping as the main content, which effectively promoted the development of agricultural production. Cotton production increased rapidly. With the change of environmental conditions, the occurrence of pests also changed significantly, some of them were suppressed, while others were serious. Cotton bollworm is a serious one and is one of the main obstacles to increase yield of cotton. In the early period of liberation, the cotton bollworm in our province was mainly concentrated in the local high yielding cotton fields. Since 1957, the area has gradually expanded, the insect population has increased, and the damage has become increasingly serious. According to Cheng’an County 15 years of data records: in 1953, the area of cotton bollworm accounted for only 0.26% of the area of cotton, expanded to 57.1% in 1958, basically expanded to all cotton fields after 1970. In 1958, the second-generation cotton fields produced only 21 eggs and only 100 larvae per head. In 1973, the number of eggs per hundred increased to 278, reaching over one thousand in a serious block and increasing to 118 in one hundred larvae than in 1958 Respectively, an increase of 13.2 times and 29.5 times. At the same time, wheat, beans