Recently, the staff of the plant protection station surveyed 20 village groups in four towns of Yangguang, Xiushan, Hexi and Sijie. The incidence of field damage on Spodoptera litura in vegetables reached 46.7%, and the average weighted average level was 0.52. In April 2010, Yunlong Village was sexual. According to the monitoring results of the attractant trap monitoring sites, the average number of male moths per day was 14.1, and 44.4 males per day were trapped in each trapping basin from May 1 to 13; Compared with April, there was an increase of 30.3 heads; the single-day single-pot trap was up to 112 heads. According to the above situation, please promptly prevent and control the plots of Spodoptera exigua with a head count of 20-50 heads.
Prevention:
(1) Protection and utilization of natural enemies resources can effectively control the population base of Spodoptera litura to a certain extent;
(2) To promote the adult trapping of S. litura sex attractant in the crop planting area of ​​the whole county, it can reduce the amount of insect pests of the main pest generation.
(3) Binding sedative measures: timely use of high-efficiency, low-toxicity, low-residual pesticides or biological pesticides to control larvae;
(4) The village group that has installed the frequency-vibration insecticidal lamp should actively work on the maintenance and management of the insecticidal lamp so as to ensure the insecticidal effect of the insecticidal lamp;
(5) Use chemical control measures strictly in accordance with the prevention and control indicators, so as to avoid increasing the drug resistance of Spodoptera litura by frequent application.
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