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自1960年以来,我们坚持12年利用金小蜂防治棉仓红铃虫,从而大大减少了棉田红铃虫的发生为害。我场棉田1972年与1960年比较,蕾被害率减轻58.1％,花被害率减轻58.6％,青铃被害率减轻49.1％。利用金小蜂防治棉仓红铃虫,首先需要解决释放前饲养金小蜂的饲料问题。1966年前,我们是以棉茧作饲料饲养金小蜂的。这种饲料需用大量人工剥茧,成本较高。1966年后,改用灰茧作饲料饲养金小蜂。几年来的实践证明,(?)
Since 1960, we have persisted in using golden bee for 12 years to control cotton bollworm, which greatly reduced the occurrence of pink bollworm in the cotton field. Cotton fields in our field in 1972 compared with 1960, the bud lessened 58.1%, the rate of flower damage reduced by 58.6%, Qingling reduced the rate of 49.1%. The use of golden bee to control cotton bollworm, the first need to address the release of gold bee before feeding the feed problem. Before 1966, we fed golden bees with cotton cocoons. This feed requires a lot of artificial cocoons, the cost is higher. After 1966, instead of using gray cocoon as feeding feed Golden Bee. Years of practice has proved that (?)