摘要
在调查白茨粗角萤叶甲各虫态、虫龄的数量、活动、为害等有关生物学习性的同时,选用1.8％阿维菌素、1.2％烟碱苦参碱乳油、3％高渗苯氧威、25％灭幼脲3号悬浮剂、50000 IU/mg-1苏云金杆菌等5种生物药剂,进行防效对比试验,结果表明:白茨粗角萤叶甲在民勤地区1年可发生3代,应在5月中下旬越冬成虫产卵盛期或者7月中下旬2代幼虫期开展防治.综合考虑经济成本和防治效果,实际防治中可轮换使用以上5中药剂.危害程度较高时推荐使用1.2％烟碱苦参碱2 000倍液和3％高渗苯氧威3 000倍液,危害程度较低时可使用1.8％阿维菌素1 000倍液、50 000 IU/mg-1苏云金杆菌1 000倍液或者25％灭幼脲3号1 000倍液.
Abstract
In addition to the investigation on the number,activity and damage of different stages and instars of the beetle,the control effects of 5 biological agents including 1.8％Avermectin,1.2％nicotine-matrine EC,3％hypertonic fenoxycarb,25％methylurea No.3 SC and 50000 IU MG-1 Bacillus thuringiensis were com-pared,the results showed that there were three generations in one year in Minqin,and the control should be carried out in the peak oviposition period of overwintering adults in mid-to-late may or in the second larva period in mid-to-late July.Considering the economic cost and control effect,the above 5 traditional Chinese medicines can be used alternately in practice.The use of 1.2％matrine 2000-fold solution and 3％Fenoxycarb 3000-fold solution is recommended when the hazard degree is high,at lower risk,use 1.8％Avermectin 1,000-fold solution,50 000 IU mg-1 bacillus thuringiensis 1,000-fold solution,or 25％Miyurea 31,000-fold solution.
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