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
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. EKB Journal Management System, 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". EKB Journal Management System, 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', EKB Journal Management System, 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. EKB Journal Management System, 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

Journal of Plant Protection and Pathology
Article 3, Volume 27, Issue 6, June 2002, Page 4155-4165  XML PDF (3.36 MB)
Document Type: Original Article
DOI: 10.21608/jppp.2002.253752
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Author
Naglaa H. EI-Sinary
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.
Keywords
Phthotimeee opercu/ella; Beauveria bassiana; gamma radiation; environmental factors; larval mortality
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