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据 3年的调查研究 ,新疆北部玉米叶螨于 5月底至 6月初开始为害玉米 ,特殊年份推迟到 6月底 ,7月底至 8月底达到高峰 ,严重时单株三叶螨量可达12 79头。玉米田主要天敌种类为深点食螨瓢 ,天敌对叶螨具有明显的“跟随”现象。秋耕冬灌对叶螨有一定的控制作用 ,4～ 5月份的气温条件 ,持续低温、降霜天气对其种群的发展极为不利 ,6～ 8月份降雨较集中或一次降雨量超过 2 0 mm以上可明显抑制玉米叶螨种群数量的发展
According to the 3-year investigation, maize spider mites in northern Xinjiang began to maize in late May to early June. The special year was postponed until the end of June and the peak of late July to the end of August. In severe cases, the amount of trilobite per plant reached 12,749 . The main natural enemies in corn field were mites with mites, and natural enemies had obvious “follow” phenomenon on spider mites. Winter mulching has some control effects on spider mites. The temperature in April ~ May continued to be low, and the frost-reducing weather is extremely unfavorable to the development of its population. The rain from June to August is more concentrated or rainfall over 20 mm Significantly inhibited the development of maize spider mite population