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自1963年我县棉尖象Phytoscaphus gos-sypii Chao突然大量发生,现已成了棉花蕾铃期的主要害虫。从1964年起,我们对棉尖象的发生规律及生活习性系统地进行了观察,并对测报和防治办法进行了研究,均取得了较好的效果。现将结果总结如下。 一、发生规律及生活习性 1.产卵数量和孵化 根据室内饲养观察,成虫羽化到始见产卵期平均为10.2天,最短4—5天,最长15—17
Since 1963, the cotton spikes of Phytoscaphus gos-sypii Chao in our county have suddenly occurred in large quantities, and now they have become the major insect pests in cotton bud bolling period. Since 1964, we have systematically observed the occurrence and habits of cotton weevil, studied the methods of reportage and prevention and treatment, and achieved good results. The results are summarized below. First, the occurrence of laws and habits 1. The number of spawning and hatching According to the indoor feeding observation, adult emergence to spawning period averaged 10.2 days, the shortest 4-5 days, the longest 15-17