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1984～1985年对晋南9县1市棉田抽样调查结果表明,棉红蜘蛛在塑膜棉田发生为害地块达50%以上,为害程度也明显重于露地棉田。1986～1990年我们在永济县棉田进行了棉红蜘蛛发生规律研究和综合防治示范,现将结果报道如下。1 棉红蜘蛛发生消长规律4年定点系统观察结果表明,棉红蜘蛛发生消长总趋势在塑膜田与露地基本相似,均为发生早、发展慢、波动少。但塑膜田内发生数量和受害程度明显重于露地。棉花出苗后齐苗不久,棉红蜘蛛就从田边地头的越冬场所首先侵入棉田边行,形成初发生中
From 1984 to 1985, the sampling survey of cotton fields in 9 counties and 1 city of Jinnan in Southern Shanxi Province showed that more than 50% of the spider mites were damaged in the plastic filming cotton fields, and the degree of damage was obviously heavier than that of the exposed cotton fields. From 1986 to 1990, we conducted a study on the regularity of cotton spider mites and comprehensive prevention and control in cotton fields in Yongji County. The results are reported as follows. 1 cotton spider mite growth and decline of 4 years of fixed-point system observations showed that the total cotton spider mite growth and decline in the plastic film field and exposed basically similar to the occurrence of early, slow development, less volatility. However, the number of plastic film field occurred and the extent of damage was significantly more than exposed. Shortly after the emergence of cotton seedling Qi, cotton spider on the first field from Tianbian overwintering places first invade the cotton fields, the formation of the first occurrence