外激素方法的实质是通过释放大量的人工合成的外激素来迷惑雄蛾,使之不能与雌蛾交配,雌蛾不能产卵。同不释放外激素的情况相比较,其结果是大大减少了棉花植株上红铃虫卵的孵化量,其后代自然也会大大 The essence of the pheromone method is to confuse male moths by releasing a large amount of synthetic pheromones so that they can not mate with female moths and the female moths can not lay eggs. Compared with the case of not releasing pheromone, the result is that the hatching amount of red bollworm eggs on cotton plants is greatly reduced, and the descendants naturally also greatly increase