秋播绿肥(红花草、豌豆、苕子)后茬种植棉花,是一个好茬口。在绿肥翻耕前喷施农药防治小地老虎的效果不甚理想。1973—1975年,我们于每年5月10—15日在棉花播种前采用灌水的方法消灭小地老虎,取得较好的防治效果。灌水后,1亩地可捞死虫4—28斤,一般田块每亩可捞死虫8斤左右。按六龄幼虫的体重计算,约合小地老虎1,500—11,000头。 Autumn sowing green manure (red flowers, peas, prickly heat) after the crop planting cotton, is a good stubble. In the green manure before spraying plowed pesticides to prevent the effect of small tigers less than ideal. From 1973 to 1975, we used the method of irrigation to eliminate the small tiger tiger before the cotton sowing on May 10-15 each year, and achieved good control effect. After irrigation, 1 mu of land can be fishing dead insects 4-28 pounds, the general plots can be seized per kilogram of insects 8 pounds or so. According to the weight of the sixth instar larvae, about 1,500-11,000 small Tigers.