安徽农业大学学报2008，Vol.35Issue(2)：246-249,4.
金龟子绿僵菌分生孢子暴露在B段紫外光下毒力的降低
Exposure of Metarhizium anisopliae conidia to UV-B radiation reduces its virulence
Edimara A Francisco 1Drauzio E N Rangel 1Newton La Scala Jr 2José C Barbosa 3Ant(o)nia do C B Correia4
作者信息
- 1. Departamento de Fitossanidade,Faculdade de Ciêneias Agrárias e Veterinárias de Jaboticabal,Universidade Estadual Paulista, Jaboticabal, SP, 14884-900, Brazil
- 2. Departament of Biology, Utah State University, UT 884322-5305,USA
- 3. Universidade do Vale do Paraíba, Instituto de Pesquisa e Desenvolvimento. Av. Shishima Hifumi,2911 Urbanova, Sao Jose dos Campos, SP 12244-000 Brazil
- 4. Departamento de Ciências Exatas,Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, Universidade Estadual Paulista,Jabeticabal, SP, 14884-900, Brazil
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摘要
Abstract
The UV-A and UV-B wavelengths of solar radiation may seriously reduce viability of Metarhizium anisopliaeconidia,a fungus used extensively in Brazil for insect pest control. The conidial tolerances to UV-A and UV-B radiation werestudied for one isolate (IBCB 425) commercially available product produced on rice grains. Aqueous or oil emulsion conidialsuspensions were irradiated for O (control), 2, or 3 h using the solar simulator filtered with diacetate filter to remove UV-Cradiation which afforded 652 mW.m-2 in the spectral range of 280～370 nm. The UV tolerance was based on conidial germi-nation (viability) and virulence to Diatraea saccharalis larvae. Conidia formulated with oil emulsion had higher survival after3 h of UV exposure, but the virulence of the eonidia previously exposed to 2 h of UV radiation were similar when oil formula-ted or not. The mortality of D. saccharalis caterpillars exposed to non-UV-irradiated conidia was greater than that of larvae ex-posed to irradiated conidia, and the LT50values were lower for the non-irradiated suspensions than for those irradiated. Thisapparent reduction in virulence was directly related reduction in viability or delay of germination of UV-irradiated conidia.关键词
simulated sunlight/ eonidial formulation/ eonidial germination/ virulence/ Diatraea saccharalisKey words
simulated sunlight/ eonidial formulation/ eonidial germination/ virulence/ Diatraea saccharalis分类
农业科技引用本文复制引用
Edimara A Francisco,Drauzio E N Rangel,Newton La Scala Jr,José C Barbosa,Ant(o)nia do C B Correia..金龟子绿僵菌分生孢子暴露在B段紫外光下毒力的降低[J].安徽农业大学学报,2008,35(2):246-249,4.
