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小地老虎是春玉米苗期的重要难治地下害虫。害虫发生严重时,常造成玉米缺苗断垄,给生产带来较大影响。随着当前玉米地膜覆盖栽培技术的大力推广,其生态环境条件有利于一代小地老虎发生为害,增加了防治上的难度。实践证明,现行使用甲胺磷等高毒药剂喷雾防治小地老虎,不但杀虫效果不理想,而且也不利于保护生态环境,已不适应生产发展的需要。为此,今年选择四种具内吸作用的杀虫剂对玉米小地老虎进行药效试验,结果如下。
Small tiger is an important refractory ground pest of the spring corn seedling stage. Serious pests, often caused by lack of maize broken ridge, to produce a greater impact. With the vigorous popularization of the current corn mulching cultivation technology, its ecological and environmental conditions are conducive to the occurrence of a generation of Tigers to harm, increasing the difficulty of prevention and control. Practice has proved that the current use of methamidophos and other highly toxic agents spray prevention and treatment of small tiger not only insecticidal effect is not ideal, but also not conducive to the protection of ecological environment, has not adapted to the needs of production and development. To this end, this year choose four kinds of systemic action insecticide on the efficacy of the test to the corn young tiger, the results are as follows.