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安徽农业大学学报 2008年第2期35卷 246-249页

作者： Edimara A Francisco Drauzio E N Rangel Newton La Scala Jr José C Barbosa Antnia do C B Correia Departamento de Fitossanidade Faculdade de Ciências Agrárias e Veterinárias de JaboticabalUniversidade Estadual PaulistaJaboticabalSP14884-900Brazil Departamento de Fitossanidade Faculdade de Ciências Agrárias e Veterinárias de JaboticabalUniversidade Estadual PaulistaJaboticabalSP14884-900BrazilDepartament of BiologyUtah State UniversityUT 884322-5305USA Currently Address:Universidade do Vale do ParaíbaInstituto de Pesquisa e Desenvolvimento.Av.Shishima Hifumi2911 Urbanova So Jose dos CamposSP 12244-000 Brazil Departamento de Ciências Exatas Faculdade de Ciências Agrárias e Veterinárias de JaboticabalUniversidade Estadual Paulista JaboticabalSP14884-900Brazil

The UV-A and UV-B wavelengths of solar radiation may seriously reduce viability of Metarhizium anisopliae conidia,a fungus used extensively in Brazil for insect pest *** conidial tolerances to UV-A and UV-B radiation were studied for one isolate(IBCB 425) commercially available product produced on rice *** or oil emulsion conidial suspensions were irradiated for 0(control),2,or 3 h using the solar simulator filtered with diacetate filter to remove UV-C radiation which afforded 652 mW·m-2 in the spectral range of 280～370 *** UV tolerance was based on conidial germination(viability) and virulence to Diatraea saccharalis *** formulated with oil emulsion had higher survival after 3 h of UV exposure,but the virulence of the conidia previously exposed to 2 h of UV radiation were similar when oil formulated or *** mortality of *** caterpillars exposed to non-UV-irradiated conidia was greater than that of larvae exposed to irradiated conidia,and the LT50 values were lower for the non-irradiated suspensions than for those *** apparent reduction in virulence was directly related reduction in viability or delay of germination of UV-irradiated conidia.

关键词：模拟阳光无性孢子表述无性孢子萌芽毒性

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