Abstract Rose sawfly Arge rosae (Hym; Argidae) is the most serious pest of the flowers of Rosaceae family. In order to evaluate the potential of entomopathogenic fungi for controlling this pest, fourth instar larvae were maintained under controlled conditions and exposed to entomopathogenic fungi, Beauveria bassiana . The bioassay was carried out by immersion method with concentrations 2 × 10 4 , 2 × 10 5 , 2 × 10 6 , 2 × 10 7 , and 2 × 10 8 conidia/ml of Tween-80 solution (0.03%) in distilled water. Each concentration was replicated four times with ten insects in each replicate. The results showed relatively high efficacy of these isolates on this insect pest. In case of IRAN 403C isolate, values of LC 50 and LT 50 were obtained as 5.54 × 10 5 conidia/ml and 3.92 days at 2 × 10 8 conidia/ml, respectively. Results showed that IRAN 403C isolate caused the highest mortality in larvae in comparison with other isolates with a mean of 70% mortality using 10 7 conidia/ml.
Virulence of four Beauveria bassiana (Balsamo) (Asc., Hypocreales) isolates on rose sawfly, Arge rosae under laboratory condition
R. Khosravi,Jalal Jalali Sendi,A. Zibaee,M. Shokrgozar
Published 2015 in Journal of King Saud University - Science
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2015
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Journal of King Saud University - Science
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Biology, Environmental Science
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