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逐行逐株调查了400余株自然生长棉花上美洲斑潜蝇危害的棉花叶片和幼虫潜道,在此基础上研究了美洲斑潜蝇的自然分布格局,结果表明:美州斑潜蝇在棉田发生的初期,其分布格局为均匀分布;在棉田发生一段时间后,即棉花生长进入蕾、花、铃盛期,被害叶片在棉田仍呈均匀分布,但幼虫潜道在棉株上、中部和以整株棉花为取样单位时为聚集分布,在棉株下部则为随机分布。进一步分析表明,幼虫潜道在棉株上、中部的聚集是由环境因素所引起的;以整株为取样单位时的聚集是由环境因素或美洲斑潜蝇自身活动习性所引起的。当以整株棉花为取样单位时,幼虫潜道的聚块面积为1株棉花。
The natural distribution patterns of the leaves and larvae of cotton leaves and larvae of more than 400 strains of naturally-grown cotton on Liriomyza sativae were investigated on a row by row basis. The results showed that: In the initial stage of cotton field, the distribution pattern was uniform distribution. After some time occurred in the cotton field, the cotton grew into the bud, flower and bell stage, and the victim leaves were still evenly distributed in the cotton field. However, the larvae ’ And to the whole plant as a sampling unit for the accumulation of cotton distribution in the lower part of the cotton were randomly distributed. Further analysis showed that larval submerged in the cotton plant, the central aggregation caused by environmental factors; to the whole plant as a unit of sampling when the aggregation is caused by environmental factors or habitat Liriomyza sativa its activity. When taking whole cotton as sample unit, the larvae ’s agglomeration area is 1 cotton.