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近年来小麦连作,给麦长腿红蜘蛛发生提供了一定寄主条件。七九年全县四万多亩麦田,都程度不同发生麦长腿红蜘蛛。据五月十五日小麦抽穗期于扎木区桑登公社第三生产队调查,虫口密度每株高达130头,叶片呈点黄状失缘,加之扬花期又遇干旱,使小麦千粒重由七八年40克左右,降至37克左右。麦长腿红蜘蛛体小、行动活泼。受惊迅速落地,每日多在上午十时至下午四时活动,往往不易引起人们注意,对其间接所造成损失亦未被重视,因而虫口基数逐年扩大,现已成为我县小麦生产上一大虫害。
In recent years, wheat continuous cropping has provided some host conditions for the occurrence of wheat long-legged spider mite. In 1979 the county forty thousand acres of wheat fields, varying degrees of wheat long legs spider mite. According to the survey on the third production team of the Sanding Commune in Zamu on May 15, the density of pest mouth per plant was as high as 130 and the leaves showed a yellowish-margin loss. In addition, when the flowering period was once more severe, the grain weight of wheat was reduced from seven Eight years 40 grams or so, down to 37 grams. Wheat long legs spider body small, lively action. Frightened rapidly landing, daily activities in the morning ten o’clock to four o’clock, are often not easy to attract the attention of their indirect losses have not been taken seriously, and thus population base has expanded each year, has now become a major county in the production of wheat Pests.