期刊
BIOCONTROL SCIENCE AND TECHNOLOGY
卷 19, 期 9, 页码 919-929出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09583150903205069
关键词
bioassay; eggs; larvae; Cordyceps cardinalis; Metarhizium anisopliae; Lecanicillium muscarium; Fusarium lateritium; Aspergillus sp; Spodoptera litura
资金
- Council of Scientific and Industrial Research (CSIR)
- Ministry of Science and Technology, Government of India [F-9/138(62)/2003-EMR 1]
The eggs and second instar larvae of Spodoptera litura were treated with different concentrations of conidial suspensions of six isolates of fungi belonging to five species, Metarhizium anisopliae var. anisopliae (Metschnikov) Sorokin (ARSEF 7487), Lecanicillium muscarium (Petch) Zare W Gams (ARSEF 7037 and ARSEF 6118), Cordyceps cardinalis (ARSEF 7193), Fusarium lateritium Nees (ARSEF 8291/MTCC 9050) and Aspergillus sp. (ARSEF 8519). In bioassay with unscaled eggs, M. anisopliae, C. cardinalis, F. lateritium and Aspergillus sp. resulted in 100% mortality above 106 conidia/mL. However, with scaled egg masses, the highest hatching rate (56%) was observed with L. muscarium (ARSEF 6118) whereas the lowest hatchings were observed in the case of M. anisopliae followed by L. muscarium (ARSEF 7037), Aspergillus sp., F. lateritium, and C. cardinalis. The larvae were also found susceptible to all isolates in a dose dependent manner. Three promising isolates against larvae, viz. M. anisopliae, F. lateritium and L. muscarium (ARSEF 7037) resulted in average percent mortalities of 88, 89 and 77%, respectively at approximate to 108 conidia/mL. When both larvae and the leaves (provided as food) were treated with approximate to 108 conidia/mL, mortality further increased for these isolates. Based on the mortality data and the LC50 values, we suggest that M. anisopliae, F. lateritium and L. muscarium (ARSEF 7037) could be developed as potential biocontrol agents against rice cutworm in IPM programs.
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