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Azab,, A., Rashad, A., Aly, S. (2007). EFFECT OF Verticillium lecanii ON THE TWO COTTON BOLLWORMS, Earias insulana BOISD. AND Pectinophora gossypiella (SAUND.) (LEPIDOPTERA). Journal of Plant Protection and Pathology, 32(10), 8685-8690. doi: 10.21608/jppp.2007.220704
A. M. A. Azab,; A. M. Rashad; Safaa H. Aly. "EFFECT OF Verticillium lecanii ON THE TWO COTTON BOLLWORMS, Earias insulana BOISD. AND Pectinophora gossypiella (SAUND.) (LEPIDOPTERA)". Journal of Plant Protection and Pathology, 32, 10, 2007, 8685-8690. doi: 10.21608/jppp.2007.220704
Azab,, A., Rashad, A., Aly, S. (2007). 'EFFECT OF Verticillium lecanii ON THE TWO COTTON BOLLWORMS, Earias insulana BOISD. AND Pectinophora gossypiella (SAUND.) (LEPIDOPTERA)', Journal of Plant Protection and Pathology, 32(10), pp. 8685-8690. doi: 10.21608/jppp.2007.220704
Azab,, A., Rashad, A., Aly, S. EFFECT OF Verticillium lecanii ON THE TWO COTTON BOLLWORMS, Earias insulana BOISD. AND Pectinophora gossypiella (SAUND.) (LEPIDOPTERA). Journal of Plant Protection and Pathology, 2007; 32(10): 8685-8690. doi: 10.21608/jppp.2007.220704

EFFECT OF Verticillium lecanii ON THE TWO COTTON BOLLWORMS, Earias insulana BOISD. AND Pectinophora gossypiella (SAUND.) (LEPIDOPTERA)

Article 3, Volume 32, Issue 10, October 2007, Page 8685-8690  XML PDF (395.83 K)
Document Type: Original Article
DOI: 10.21608/jppp.2007.220704
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Authors
A. M. A. Azab,; A. M. Rashad; Safaa H. Aly
Plant Protection Research Inst., Agric. Res. Center, Dokki, Giza, Egypt
Abstract
Laboratory bioassays of the fungus, Verticillum lecanii against different stages of the two cotton bollworms, Earias insulana Boisd. and Pectinophora gossypiella (Saund.) under different concentrations of fungus were studied. The fungus proved virulent efficacy against eggs and larvae of both pests treated eggs of both insect pests caused a reduction rate in the hatchability whereas eggs hatchability was reduced for both insect pests. It was evident that eggs and larvae of both insects were susceptible to fungal infection and most of hatched larvae from treated eggs failed to develop to adults and dead in both E. insulana and P. gossypiella. LC50 values against        E. insulana eggs and larvae were  1.1X107 spores/ml and 1.8X107 spores/ml, respectively; whereas  LC50 values against P. gossypiella eggs and larvae were  1X107 spores/ml and 1.5X107 spores/ml, respectively. Data clarified that P. gossypiella was more susceptible to the fungal than E. insulana through all the tested stages.
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