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近些年大豆的种植面积一直居高不下。由于大面积耕地多年连续种植大豆同一种作物,导致以取食大豆根、茎、叶为主的害虫的虫口密度逐年加大;而且近几年全球气候变暖,害虫的越冬基数较大,每年都要投入大量的人力、物力、财力,才能将虫口密度控制在一定的范围内,以保证大豆的正常发育。要及时地消灭害虫,控制害虫的发生趋势,防止其大发生,就要掌握害虫的生活习性与发生特点,以便及时用药。1蛴螬1.1发生特点
In recent years, soybean acreage has been high. Due to continuous cultivation of the same crop of soybean for many years on a large area of cultivated land, the population density of insects such as roots, stems and leaves mainly increases year by year. In recent years, global warming has caused a large number of pests overwintering. To invest a lot of manpower, material and financial resources in order to control the density of insects in a certain range, in order to ensure the normal development of soybean. We must promptly eliminate pests, pests control the trend, to prevent its occurrence, it is necessary to grasp the pest habits and occurrence characteristics in order to timely medication. 1 蛴 螬 1.1 Features