河南省麦田常发生的麦蜘蛛有两种,即麦长腿蜘蛛和麦圆蜘蛛。麦长腿蜘蛛性喜温暖、干燥,秋季雨少、春季干旱是其猖獗发生的主要条件。我省去秋今春连续干旱,若3～5月份仍没有较大的降雨,今年春季麦长腿蜘蛛很可能大发生。据多年资料分析,凡12月至下年5月总降雨量在100毫米上下的年份,就是麦长腿蜘蛛的特重发生 There are two kinds of wheat spiders that often occur in the wheat fields in Henan Province, namely the wheat long-legged spider and the wheat round spider. Wheat long leg spiders like warm, dry, less rain in autumn, spring drought is the main condition of its rampant. My province to the autumn and spring continuous drought, if 3 to May there is no greater rainfall, the spring wheat leg spider is likely to occur this spring. According to many years of data analysis, where from December to May next year, the total rainfall in the 100 mm up and down the year, is the wheat long leg spiders special heavy occurrence