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湘西水稻害虫种类较多,发生时间不一。猖獗期正是农活最繁忙的时刻,防治时往往顾此失彼,为此,1963年采用“六六六打犁块”的方法。在插秧前,于最后一次耖田时,把6％可湿性六六六粉,拌和细润土,均匀撒下,每亩施药量分4斤、5.5斤、6斤、6.5斤、8斤、21斤等不同处理。共分两组进行,土质、肥料等条件均相同。品种都是“齐粘”(早熟中稻),同于4月下旬播种,5月25日插秧,秧苗带蚁螟株率为1.2％。
Xiangxi rice pests species more, time of occurrence varies. Rampant period is farming the busiest moment, prevention and control often lose sight of this, 1963, “six six six plow block” approach. Before transplanting, in the last time Tian field, the 6% wettable six six six powder, fine mixed soil, evenly sprinkle, the amount of pesticides applied per mu points 4 pounds, 5.5 pounds, 6 pounds, 6.5 pounds, 8 pounds, 21 pounds and other different treatment. Divided into two groups, soil, fertilizer and other conditions are the same. Varieties are “Qi sticky” (early maturing rice), the same sowing in late April, May 25 planting, seedling with ants borer strain rate of 1.2%.