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小地老虎是我省东部地区重要农业害虫之一,在临洮川水地区历年发生,为害作物以玉米、洋芋为主,常咬断作物茎杆,造成缺苗断垄。据今年我们初步调查,旭东三队冬麦套玉米地被害株率高达39.5％,缺苗株率3.9％,旭东五队冬麦套玉米地被害株率达19.3％,南街六队冬麦套玉米地被害株率达18.7％。本地区小地老虎成虫预测、产卵寄主、幼虫为害作物和受害程度以及田间药剂防治工作以前,缺乏研究。为了保证作物全苗、高产,我们和旭东三队病虫测报点的同志协作,于4月中至5月底对小地老虎进行了测报田间调查和防治试验。
Small tiger is one of the important agricultural pests in the eastern part of our province, occurring in Linchuan-Chuanshui area over the years. Harm crops mainly consist of corn and potato, often cutting stems of crops, resulting in lack of seedling and breaking of ridge. According to our preliminary investigation this year, the rate of damaged plants of winter wheat and corn in Xudong East Group was as high as 39.5% and the rate of seedlings without seedlings was 3.9%. The rate of damaged plants in winter wheat and corn in Xudong Team reached 19.3% Maize corn plant damage rate of 18.7%. Until now, there has been a lack of research on the predictions of adults of Little Tigers in the region, the spawning host, larvae, and the degree of victimization and field pharmacy control. In order to ensure the crop full seedling, high yield, we collaborate with the comrades of Xudong three pest survey points, in mid-April to the end of May to test the field tiger to field investigation and prevention and control tests.