Ecofriendly Control of the Pink Bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) by Using Chitosan and Spinosad | ||||
Journal of Nuclear Technology in Applied Science | ||||
Volume 11, Issue 1, 2023, Page 1-11 PDF (1.97 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/jntas.2023.203777.1055 | ||||
View on SCiNiTO | ||||
Authors | ||||
H. Awad1; Ahlam Gabarty 2; I.E. Shehata3; A.A. Abass1; E. El-Said1 | ||||
1Zoology and Entomology Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt. | ||||
2Egyptian Atomic Energy Authority | ||||
3Biological and Agricultural Research Division, Department of Pests and Plant Protection, National Research Center, Giza, Egypt. | ||||
Abstract | ||||
This study was conducted to assess the susceptibility of the 4th instar larvae of Pectinophora gossypiella to different concentrations (0.01, 0.05, 0.1, 0.5, 1, 5, and 10%) of chitosan and spinosad by the application of two treatment tactics on the control of 4th larval instar of P. gossypiella. Also, an investigation of the impact of sub-lethal dose LC50 on the reproductive potential of insects was determined. The mortality percent was 46.7% when the larvae were fed on artificial medium mixed with chitosan powder, while was 73.3 % when the larvae were fed on artificial medium mixed with chitosan dissolved in 2ml of glacial acid at the highest concentration of 10% after 6 days post-treatment. On the other hand, the first feeding tactic of spinosad induced 100% larval mortality, while the second spraying tactic induced 66.7% larval mortality at the concentration level of 10% after 6 days post-treatment. There was a reduction in the fecundity, hatchability %, and the resulting adult percent where the adult emergence was 61.9 and 59.9 % at the dose level LC50 of chitosan and spinosad, respectively compared to 97.6 % for control. Also, the growth rate of both larvae and the pupae is decreased in spinosad and chitosan compared to the control. We conclude this sub-lethal dose LC50 of chitosan and spinosad is recommended for establishment in the control of P.gossypiella. | ||||
Keywords | ||||
Pectinophora gossypiella; Chitosan; Spinosad | ||||
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