Effect of storage temperatures on the pathogenicity of Beauveria bassiana formulations against the cottonleaf worm, Spodoptera littoralis (Boisduval) (Lepidoptera: | ||
| Journal of Basic and Environmental Sciences | ||
| Volume 10, Issue 2, April 2023, Pages 51-66 PDF (527.71 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jbes.2023.372255 | ||
| Authors | ||
| Hussein Farid Mohamed* 1; Sahar Sayed Ali Mohamed2; Mahmoud Abd-elmohsen Sweilem3; Reyad Mohamed El-Sharkawy3; Ola Elsayed Abd Alrahman El-khawaga4 | ||
| 1Biological Applications Department, Nuclear Research Centre, Atomic Energy Authority, Egypt. | ||
| 2Bio-Insecticide Production Unit, Plant Protection Research Institute, Agricultural Research Center, Giza, Egypt | ||
| 3Botany department, Faculty of Science, Benha University, Egypt. | ||
| 4Biological Applications Department, Nuclear Research Centre, Atomic Energy Authority, Egypt | ||
| Abstract | ||
| The aerial conidia of the entomopathogenic fungus Beauveria bassiana served as the basis for the preparationof the wettable powder and inverted emulsion formulations. We evaluated the insecticidal efficacy of preparedconidia against the second-instar larva of the Cotton leafworm, Spodoptera littoralis, according to storagetemperature in order to establish the ideal conditions for long-term storage. The formulations' pathogenicity to S. littoralis larvae varied significantly, according to an analysis of mortalitydata. The formulation that best preserved the pathogenicity of conidia for a longer period of time was wettablepowder. Formula kept at freezing conditions -10°C was more virulent comparing to formula kept at coolingconditions 4°C and at the room temperature (25°C). This finding implies that conidial pathogenicityismaintained at low and moderate temperatures. | ||
| Keywords | ||
| Entomopathogenic fungus; Beauveria bassiana; Formulations; Conidia; Spodoptera littoralis | ||
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