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甜菜夜蛾在鲁南地区属常发性和大发生性害虫。由于长期使用有机磷和菊酯类农药防治甜菜夜蛾幼虫,已产生较强的抗药性,药剂选择范围比较狭窄。在幼虫高发期,菜农采用增加施药次数,提高施药浓度,以求达到灭虫的目的。结果既大量杀伤了天敌、破坏了该系统生态平衡,造成害虫再次猖獗,同时使蔬菜中农药残留严重超标,影响食用。为此,指导菜农科学用药,开展综合防治是生产无公害蔬菜,降低甜菜夜蛾危害的必然选择。
Spodoptera exigua is a common and catastrophic pest in Lunan area. Long-term use of organophosphate and pyrethroid pesticides against beet armyworm larvae, has produced strong resistance, drug selection is relatively narrow range. In the high incidence of larvae, farmers increase the frequency of application, increase the concentration of pesticides in order to achieve the purpose of pest control. As a result, the natural enemies were massively destroyed, the ecological balance of the system was destroyed, the pest was rampant again, and the pesticide residues in vegetables exceeded the standard seriously, which affected the consumption. To this end, to guide vegetable science and medicine to carry out comprehensive prevention and control is the production of pollution-free vegetables, reduce beet armyworm the inevitable choice.