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棉蚜从5月初到8月中旬几乎连续发生不断,但高峰期危害最为严重。高峰期分苗蚜高峰和优蚜高峰,苗蚜高峰一般在6月上中旬,优蚜高峰在7月上中旬(有的年份在7月20日),当苗蚜防治的及时,伏蚜发生相对就减轻了。一、苗蚜的综合防治苗蚜的防治应掌握3点即:播前药剂拌种;第二出苗后通过间苗除蚜,将间掉的蚜苗带出田外处理可
Cotton aphid ceaselessly occurred continuously from the beginning of May to the middle of August, but the peak was the most serious. In the peak period, the peak of the young aphids and the peak of the excellent aphids were observed. The peak of the young aphids was generally mid-June and the peak of the excellent young aphids was mid-July (some of them were on July 20). When the young aphid was controlled timely, Relatively reduced. First, the comprehensive prevention and treatment of seedling aphid Seedling aphid control should be mastered 3:00: seed dressing before sowing; after the emergence of the seedling by the second emergence of aphids, the off the aphid out of the field treatment can be