首页> 中文期刊> 《安徽农业大学学报》 >金龟子绿僵菌分生孢子暴露在B段紫外光下毒力的降低

金龟子绿僵菌分生孢子暴露在B段紫外光下毒力的降低

         

摘要

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 control.The conidial tolerances to UV-A and UV-B radiation were studied for one isolate(IBCB 425) commercially available product produced on rice grains.Aqueous 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 nm.The UV tolerance was based on conidial germination(viability) and virulence to Diatraea saccharalis larvae.Conidia 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 not.The mortality of D.saccharalis 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 irradiated.This apparent reduction in virulence was directly related reduction in viability or delay of germination of UV-irradiated conidia.

著录项

  • 来源
    《安徽农业大学学报》 |2008年第2期|246-249|共4页
  • 作者单位

    Departamento de Fitossanidade;

    Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal;

    Universidade Estadual Paulista;

    Jaboticabal;

    SP;

    14884-900;

    Brazil;

    Departamento de Fitossanidade;

    Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal;

    Universidade Estadual Paulista;

    Jaboticabal;

    SP;

    14884-900;

    BrazilDepartament of Biology;

    Utah State University;

    UT 884322-5305;

    USA Currently Address:Universidade do Vale do Paraíba;

    Instituto de Pesquisa e Desenvolvimento.Av.Shishima Hifumi;

    2911 Urbanova;

    So Jose dos Campos;

    SP 12244-000 Brazil;

    Departamento de Ciências Exatas;

    Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal;

    Universidade Estadual Paulista;

    Jaboticabal;

    SP;

    14884-900;

    Brazil;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 S476.12;
  • 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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