PJB-2021-147
Nano-copper, temperature, biopesticides and traditional compounds mitigate the adverse effects of cowpea beetle in correlation with germination percentage of cowpea
Maha I. El-Sawy, Attiah Y. Keratum, Raafat B. Abou Arab, Mohamed F. Shady and Sherif M. Abdel-Dayem
Abstract
This study aimed to evaluate the efficacy of three plant extracts (Ficus, camphor, and clove) and their powders compared with a pyrethroid insecticide (cypermethrin) and copper nanoparticles against the cowpea beetle Callosobruchus maculatus. This study also determined the effects of different temperatures on the progeny arising from immature stages of C. maculatus (eggs, larvae, and pupae). Toxicity, progeny, % F1 reduction, % seed weight loss, and effect on immature stages were studied using the mixing with feeding medium method. Results showed that cypermethrin and copper nanoparticles achieved the highest mortality followed by plant powders and their extracts. In addition, these materials had the same effects on % adult reduction and % weight loss. Most of the immature stages were deterred under the studied temperatures, except for 30°C, which was the most suitable for development of the tested stages. Temperatures of 40°C and 45°C completely prevented any emergence at all durations of exposure, whereas 20°C, 25°C, and 35°C reduced the number of adult emergence. Using plant extracts and their powders provided cowpea seeds the best protection against C. maculatus infestation. In addition, the formulations of plant (extract/powder) and the age of deposit affected plant efficiency. Among the tested materials, clove extract had the highest effect, whereas its powder exerted the least effect. The powders were better than the extracts. Furthermore, the combination of the different tools used in the present investigation might be an effective approach of integrated pest management strategy
To Cite this article:
El-Sawy, M.I., A.Y. Keratum, R.B. Abou-Arab, M.F. Shady and S.M. Abdel-Dayem. 2022. Nano-copper, temperature, biopesticides and traditional compounds mitigate the adverse effects of cowpea beetle in correlation with germination percentage of cowpea. Pak. J. Bot., 54(6): DOI: http://dx.doi.org/10.30848/PJB2022-6(33)
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