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| Impact of Temperature on Virulence of Beauveria bassiana Canada No.1 Isolate to
Bemisia tabaci（Gennadius） |
| LIU Zhao1，ZHANG Xian-liang2，LEI Zhong-ren 3* |
1 Institute of Entomology，College of Plant Protection，Southwest University，Chongqing 400715，China；2 Kaifeng
Research Academy of Agriculture and Forestry，Kaifeng 475004，Henan，China；3 Institute of Plant Protection，Chinese
Academy of Agricultural Sciences，Beijing 100193，China |
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Abstract To identify the effects of temperature on the infection of Beauveria bassiana Cananda No.1
isolate against the tobacco whitefly， Bemisia tabaci（Gennadius），the spore germination rate，mycelial growth
speed，changes in activities of extracellular proteinase and chitinase were observed and studied under 5 different
temperature conditions（19，22，25，28，31℃）. The results showed that the isolate Cananda No.1 owned
the maximum parameter values and the highest virulence against B. tabaci at temperature of 28 ℃ . The spore
germination rate，mycelial growth speed，activities of extracellular proteinase and chitinase，and virulence against B.
Tabaci were significantly reduced when the temperature was higher or lower than 28 ℃ .
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Received: 22 November 2013
Published: 26 January 2014
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