地膜植棉是实现棉花早熟、优质、高产的重要措施,但随着地膜棉的推广及连作年限的增加,地膜棉苗期盲蝽象的发生出现了一些新的特点,往往造成大量的无头棉或多头棉。使之早播不早发,减产在一成以上。 一、发生特点 1、发生早 1987～1990年连续4年调查资料表明,地膜棉田见第一代盲蝽象若虫始盛期为4月25～30日,见为害状始盛期为5月初。而露地棉田见盲蝽象成虫的始盛期 Plastic film cotton is an important measure to achieve precocity, high quality and high yield of cotton. However, with the popularization of mulching cotton and the increasing number of continuous cropping, some new characteristics appeared in the emergence of mulch cotton seedling mulching, which often resulted in a lot of headless Cotton or long cotton. As early as the broadcast so early hair, cut in more than 10%. First, the occurrence of characteristics 1, occurred 1987 ~ 1990 for 4 consecutive years survey data show that the first generation of cotton mulching see the first generation of Nymph nocturnal as April 25 to 30, see the beginning of the pest for the early May. The open field of cotton see the bugs like the initial stage of adult worms