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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。现笔者将大豆常见病虫草害的识别与防治技术介绍如下。一、大豆灰斑病1、症状识别主要为害成株期叶片,也可侵染幼苗、茎、荚和种子。病
In recent years, soybean acreage has been high, due to large areas of cultivated land for many years continuous cultivation of the same crop of soybeans, resulting in feeding soybean root, stem, leaf-based pest insect density increased year by year; and in recent years the global Climate warming, pests, a large base of winter, every year to invest a lot of manpower, material and financial resources in order to control the density of insects in a certain range to ensure the normal development of soybean. Now I will identify the common pests and diseases of soybean disease prevention and control technology are as follows. First, the soybean gray spot disease 1, the main symptom identification damage adult leaves, but also infect seedlings, stems, pods and seeds. disease