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《Guangdong Forestry Science and Technology》 2009-02
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Studyies on Biological Characteristics of Encarsia amicula Viggiani et Ren

Chen Ruiping1 Lin Xuping2 Xu Shaochang2 Lin Mingsheng1 Chen Murong2Qiu Weiguo3 Chen Jing4 Xu Jiaxiong1 Zhao Danyang1(1.Guangdong Forest Research Institute,Guangzhou,510520;2.Forest Pest Management and Quarantine Station of Guangdong Province;3.Forest Pest Management and Quarantine Station of Xinyi City;4.Forest Pest Management and Quarantine Station of Luoding City)  
Biological characteristics of Encarsia amicula Viggiani et Ren which as natural enemy of Hemiberlesia pitysophila Takagi was observed.The test showed that short-term low temperature(5℃) had little effect on activities of the wasp,whereas the low temperature lasted 24 h,the wasp would dead.E.amicula has two fastigiums of emergence in one day:11:00 am to 13:00 pm and 15:00 pm to 17:00 pm.The testa size of H.pitysophila had little relation not only with the body but also with the hole of the eclosion of the wasp.E.amicula could lay eggs on H.pitysophila which was laid eggs by himself,homogeneity and heterogeneity wasps,and they preferred to laying eggs in the female scale that had been pregnant.E.amicula mainly parasitized female scale that were above 2 stages and didn't parasitize male scale.The fecundity of the wasps were positively correlated with the size of body,and the changed curve was growth curve.Under the condition of feeding honey,the fecundity in the first day of eclosion occupies 68% of the total fecundity of one female adult,the average oviposition rate was 65.79%.The ratio of natural sex of E.amicula was about 40∶1.The wasps without mating could also produce offspring,and the filial generation was all female.The activities of parasitization of E.amicula most occured at about 16:50.
【Fund】: 广东省自然科学基金项目(7005504)“友恩蚜小蜂(Encarsiaamicula)生物学特性研究”;; 广东省林业局项目(2006-22)“应用友恩蚜小蜂和黄蚜小蜂防治松突圆蚧技术研究”
【CateGory Index】: S769
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