西平麦区蚜虫发病规律及防治措施研究

为了防治小麦蚜虫。通过"三密"(行距为20 cm)、"三稀"(行距为35 cm)播种方式和夜间、白天防除的对比试验研究蚜虫的防治措施。蚜虫危害程度与播种密度、施药时期和时间有关。稀行能抑制蚜虫的大量繁殖,减少打药次数;密植使农田中的空气湿度增加,利于蚜虫的繁殖。在有翅蚜刚刚来临时打药,防治效果好;白天打药对蚜虫的防治效果没有夜晚好。采用有翅蚜夜间综合防除技术,可以减少施药量和施药次数。

Study on Aphids Control Measures in Wheat Areas of Xiping County

The objective of research was to prevent and control aphids.The control measures of aphids were studied through 3-dense(row spacing of 20 cm) and 3-rare(row spacing of 35 cm) sowing modes and comparison experiments with control in the daytime and at night.The damage degree of aphids was related to planting density,stage and time of pesticide application.Rare row could inhibit a great deal of propagation of aphids and reduce time of applying pesticide.Dense planting could increase the air humidity in the farmland,which was in favor of aphids' propagation.The pesticides applied in the time when the winged aphids came just now could get the good control effect.The control effect of applying pesticide in daytime on aphids was not better than that in night. Adopting comprehensive control technology against winged aphids in night could reduce application amount and application times of pesticide