EI-Sinary, N. (2002). INFLUENCE OF THE ENTOMOPATHOGENIC FUNGUS, Beauveria bassiana (BALSMO) ON THE MATURE LARVAE OF THE POTATO TUBERMOTH, Phthorimaea opercu/ella (ZELLER) UNDER DIFFERENT DEGREES OF TEMPERATURE AND RELATIVE HUMIDITY. Journal of Plant Protection and Pathology, 27(6), 4155-4165. doi: 10.21608/jppp.2002.253752
Naglaa H. EI-Sinary. "INFLUENCE OF THE ENTOMOPATHOGENIC FUNGUS, Beauveria bassiana (BALSMO) ON THE MATURE LARVAE OF THE POTATO TUBERMOTH, Phthorimaea opercu/ella (ZELLER) UNDER DIFFERENT DEGREES OF TEMPERATURE AND RELATIVE HUMIDITY". Journal of Plant Protection and Pathology, 27, 6, 2002, 4155-4165. doi: 10.21608/jppp.2002.253752
EI-Sinary, N. (2002). 'INFLUENCE OF THE ENTOMOPATHOGENIC FUNGUS, Beauveria bassiana (BALSMO) ON THE MATURE LARVAE OF THE POTATO TUBERMOTH, Phthorimaea opercu/ella (ZELLER) UNDER DIFFERENT DEGREES OF TEMPERATURE AND RELATIVE HUMIDITY', Journal of Plant Protection and Pathology, 27(6), pp. 4155-4165. doi: 10.21608/jppp.2002.253752
EI-Sinary, N. INFLUENCE OF THE ENTOMOPATHOGENIC FUNGUS, Beauveria bassiana (BALSMO) ON THE MATURE LARVAE OF THE POTATO TUBERMOTH, Phthorimaea opercu/ella (ZELLER) UNDER DIFFERENT DEGREES OF TEMPERATURE AND RELATIVE HUMIDITY. Journal of Plant Protection and Pathology, 2002; 27(6): 4155-4165. doi: 10.21608/jppp.2002.253752
INFLUENCE OF THE ENTOMOPATHOGENIC FUNGUS, Beauveria bassiana (BALSMO) ON THE MATURE LARVAE OF THE POTATO TUBERMOTH, Phthorimaea opercu/ella (ZELLER) UNDER DIFFERENT DEGREES OF TEMPERATURE AND RELATIVE HUMIDITY
Natural Products Department, National Center for Radiation Research and Tec~nology, Atomic Energy Authority, Nasr City, Cairo, Egypt.
Abstract
'This study was concerned with the efficiency of the entomopathogenic fungus Beauveria bassiana (Balsmo), on the mature larvae (4th instar) of the potato tubermoth Pnthonmeee opercu/ella (Zeller) with two different environmental factors under laboratory conditions, e. g. temperature regimes (18, 21, 24, 27 and 30°C) and relative humidity regimes (50, 60, 70a 80 and 90% R. H.). Four concentra-tions of conidial powder were prepared (1x10, 107, 106 105) conidia/ml. Some biological aspects were determined, e,g., Survived larvae, pupation and emergence percentages, Results indicated that there were a positive relation between fungal concentrations and reduction inpercentages of larval development. Different regimes in temperature and relative humidity have great influence on the fung~1 pathogenicity. Highly significant reduction 'in the fourth larval instar ' development was' obtained with 27 and30°Ctemperature regimes and with 80 and 90% relative humidity regimes. Percentage of larval mortality was scored with the four fungal concentrations for 8 days, It was, clearly noticed that 108 fungal concentra- tion gave 60,67' and 81.67 percentage of mortality after 3 and 4 days, respectively. When ,the: fourth I€lnial instar was reared on gam'ma, irradiated potato tubers (40, soano 120 Gy) the larval mortality' was significantly' lncreased especially with 120 Gy. larval duration was increased as the dose of gamma irradiation increased.
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