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| Toxicity Determination of Beauveria bassiana Isolates on Thrips palmi Karny |
| YUAN Sheng-yong1，KONG Qiong1，XUE Chun-li1，TIAN Xue-jun1，CHEN Bin2，SHEN Dengrong1 |
（1College of Life Science and Technology， Honghe College， Mengzi 661100， Yunnan， China； 2College of Plant
Protection， Yunnan Agricultural University， Kunming 650201， Yunnan， China） |
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Abstract Virulence of Beauveria bassiana Bb050230 strain at different concentration to the
adults and larvae of Thrips palmi Karny was evaluated in the laboratory. The results indicated that the
strain Bb050230 had higher pathogenicity to adults and larvae of Thrips palmi Karny．After inoculating
strain Beauveria bassiana Bb050230 with 3.0×108 conidia·mL-1 for 8 days，the correct mortality
of adult and larvae were 85.76% and 83.25%，respectively. The median lethal times（ LT50） were 4.43
days and 4.79 days. The median lethal concentration（LC50） for adult and larvae at the 8th day were
determined as 3.106×105 conidia·mL-1 and 3.284×105 conidia·mL-1，respectively.
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Received: 29 March 2013
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