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都兰钝额斑螟的生物学特性及四种杀虫剂的室内毒力测定
Biology of Bazaria dulanensis and toxicity of four pesticides in the laboratory
严林1,邓晓青1,张永军1,杜艳丽2**
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DOI:
作者单位:1青海大学农牧学院草业科学系西宁810016; 2 北京农学院植物科学技术学院北京102206
中文关键词:都兰钝额斑螟,生物学特性,唐古特白刺,毒力
英文关键词:Bazaria dulanensis,biological characters,Nitraria tangutorum, toxicity
中文摘要:

        都兰钝额斑螟Bazaria dulanensis Du et Yan是柴达木盆地南部地区唐古特白刺(Nitrada tangutorum Bobr.)灌丛的主要害虫之一。为有效控治该害虫对唐古特白刺的危害,本研究采用室内饲养和田间定点观察,对其生物学特性进行观察,结果表明:都兰钝额斑螟在柴达木盆地一年发生1代,幼虫共5龄,以滞育蛹越冬,翌年5月下旬越冬成虫开始羽化,6月上旬为交配、产卵盛期,6月下旬为卵孵化盛期,幼虫期从6月中旬开始一直延续至8月下旬,8月中下旬进入化蛹盛期,随后蛹进入滞育越冬。其中,7月中下旬为初龄幼虫发生盛期,是该害虫防治的最佳时期。毒力试验结果表明:4种杀虫剂对4龄幼虫的触杀毒力从高到低依次为氯氰菊酯、阿维菌素、类产碱、草毒蛾;对5龄幼虫的胃毒毒力从高到低依次为氯氰菊酯、类产碱、阿维菌素、草毒蛾。对4龄幼虫的触杀毒力从高到低依次为阿维菌素、类产碱、氯氰菊酯、草毒蛾;对5龄幼虫的触杀毒力从高到低依次为类产碱、阿维菌素、氯氰菊酯、草毒蛾。 YAN 

英文摘要:

          Bazaria dulanensis Du et Yan is an important pest of the shrub Nitrada tangutorum Bobr. in the southern Tsaidam Basin. Field and laboratory experiments were carried out to investigate the biology of B. dulanensis, and toxicity tests were run to determine the potential of four pesticides; alphacypermethrin, Neichanjian, avermectins and Caoduer to control this pest. The results show that this moth is univoltine in the Tsaidam Basin with five larval instars. The pupae overwinter in soil and adults emerge the following May. Mating and copulation were often observed during the first third of June, whereas the hatching of eggs occurred in late June. The larval stage occurred from midJune to lateAugust, and larvae pupated from mid to late August. Mid to late July is the critical time for control of earlystage larvae. The relative ingested toxicity of the 4 insecticides with respect to 4th instar larvae was, in descending order, alphacypermethrin > avermectins > Pseudomonas pseudoalcaligenes > Gynaephora ruoergensis Nuchear polyHedrosis rirus, and, for 5th instar larvae; alphacypermethrin > Pseudomonas pseudoalcaligenes> avermectins > Gynaephora ruoergensis Nuchear polyHedrosis rirus. The relative contact toxicity to 4th instar larvae was avermectins > Pseudomonas pseudoalcaligenes> alphacypermethrin > Gynaephora ruoergensis Nuchear polyHedrosis rirus, and for 5th instar larvae; Pseudomonas pseudoalcaligenes> avermectins > alphacypermethrin > Gynaephora ruoergensis Nuchear polyHedrosis rirus.

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