红铃虫损失率测定表明,一代虫花数和因虫害花引起的高脱落,不影响棉株结铃数和成铃结构,相反,伏前桃和桃数还有随史花增加而增多的趋势,人工摘花模拟与实际为害趋向一致。故在目前产量水平下,一代红铃虫为害无损失,从经济学观点考虑,无需做任何防治。然而一代花虫几乎是危害最大,损失最重的二代红铃中的唯一虫源。过去采用越冬防治控制第一代发生数量,借此减轻田间防治负担的有效措施,随着生产责任制的改变,已不适 Red bollworm loss rate determination showed that the number of insects and pests caused by a high number of flowers off, does not affect the number of bolls and bolls of cotton structure, on the contrary, the number of peach and peach volvulus also increased with the increase of history Trend, manual picking simulation and actual damage tend to be the same. Therefore, at the current production level, the generation of red bollworm damage without loss, from the economic point of view, without any control. However, a generation of pests is almost the most harmful and loss of the second generation of red bell pests. In the past, the effective measures to reduce the burden of prevention and control in the field by using the first generation of overwintering prevention and control measures have become uncomfortable with the change of the production responsibility system