河西走廊荒漠草原白茨粗角萤叶甲发生及生物防治研究

Studies on the occurrence and biological control of Diplocarya Batsch in the desert steppe of Hexi Corridor

中文关键词: 荒漠草原  白茨粗角萤叶甲  生物防治

英文关键词: Desert grassland  Diorhabda rybakowi  Biological control

中文摘要:

      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、50000IU/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2000倍液和3%高渗苯氧威3000倍液，危害程度较低时可使用1.8%阿维菌素1000倍液、50000IU/mg-1苏云金杆菌1000倍液或者25%灭幼脲3号1000倍液。

英文摘要:

      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 compared, 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.