德国小蠊粪便提取液对其自身的引诱作用

Attracting effect of fecal extract of Blattella germanica on themselves

目的测定不同龄期和性别德国小蠊粪便的乙醇提取液对其自身的引诱效果,为德国小蠊的化学防治提供更有效的指导。方法采用有机溶剂浸泡德国小蠊粪便,得到粪便提取液,用四臂嗅觉仪测定引诱效果。结果低龄若虫粪便的乙醇提取液对低龄若虫、高龄若虫、雄成虫、雌成虫的引诱效果均为最好,诱集率分别为39.72%、40.56%、38.33%和34.17%;其次是高龄若虫粪便提取液,诱集率分别为30.56%、30.56%、27.22%和26.11%;雌雄成虫粪便乙醇提取液引诱效果最差,但雄成虫粪便提取液对雌成虫的引诱率达22.22%,雌成虫粪便提取液对雄成虫的引诱率达24.72%,均高于若虫和同性成虫粪便提取液的引诱效果。在毒饵中分别加入一定量的低龄若虫或高龄若虫粪便的乙醇提取液时,其诱杀活性明显提高,其中溴氰菊酯毒饵24h诱杀率由26.00%分别提高到54.00%和48.00%,辛硫磷毒饵24h诱杀率由20.00%分别提高到48.00%和40.00%。结论低龄若虫粪便提取液对不同龄期若虫和雌雄成虫均有较好的引诱效果,不同性别的粪便乙醇提取液对异性引诱效果较好。低龄若虫和高龄若虫的粪便乙醇提取液与毒饵混合后,均有较好的诱杀效果。

Objective Attracting effect of fecal extract of the Blattella germanica of different ages and genders on themselves was measured in the present study in order to provide more effective guidance on the chemical control of B.germanica.Methods B.germanica feces were immersed in organic solvents to produce the extract,of which the attracting effect was measured by a four-arm olfactometer.Results The ethanol fecal extract of early nymphs was the best to attract early nymphs,late nymphs,male adults and female adults,with the attraction rates of 39.72%,40.56%,38.33% and 34.17%,respectively,followed by fecal extract of late nymphs,the attraction rates of which were 30.56%,30.56%,27.22% and 26.11%,respectively.The extracts of male and female adult feces were the worst at attracting,though the one of male adult feces had an attraction rate of 22.22% to female adults,and that of the female adult fecal extract reached 24.72% to male adults,both higher than the effect of nymph fecal extracts and that between the same gender.The effectiveness of toxic baits increased significantly when added a certain amount of the ethanol extracts of early or late nymph feces;the 24 h kill rate of deltamethrin baits increased from 26.00% to 54.00% and 48.00%,respectively;the 24 h kill rate of phoxim baits increased from 20.00% to 48.00% and 40.00%,respectively.Conclusion The fecal extract of early nymphs had a favorable attracting effect on the nymphs of all ages and male and female adults,while the fecal extract of a certain gender satisfyingly attracted the opposite.Mixed with the ethanol fecal extract of early and late nymph,the toxic baits demonstrated improvement in the killing efficiency.