Ibrahim, K., Moustafa, Z., Mouhamed, S., Mahmoud, D. (2020). Efficacy of Partially Purified Soybean Protease Inhibitor on The Development of Cotton Leafworm, Spodoptera littoralis (Bosid.). test, 13(4), 267-274. doi: 10.21608/eajbsa.2020.139474
Kholoud, A.E. Ibrahim; Zahia, K. Moustafa; Sondos, A.E. Mouhamed; Dalia Mohamad Mahmoud. "Efficacy of Partially Purified Soybean Protease Inhibitor on The Development of Cotton Leafworm, Spodoptera littoralis (Bosid.)". test, 13, 4, 2020, 267-274. doi: 10.21608/eajbsa.2020.139474
Ibrahim, K., Moustafa, Z., Mouhamed, S., Mahmoud, D. (2020). 'Efficacy of Partially Purified Soybean Protease Inhibitor on The Development of Cotton Leafworm, Spodoptera littoralis (Bosid.)', test, 13(4), pp. 267-274. doi: 10.21608/eajbsa.2020.139474
Ibrahim, K., Moustafa, Z., Mouhamed, S., Mahmoud, D. Efficacy of Partially Purified Soybean Protease Inhibitor on The Development of Cotton Leafworm, Spodoptera littoralis (Bosid.). test, 2020; 13(4): 267-274. doi: 10.21608/eajbsa.2020.139474

Efficacy of Partially Purified Soybean Protease Inhibitor on The Development of Cotton Leafworm, Spodoptera littoralis (Bosid.)

Egyptian Academic Journal of Biological Sciences. A, Entomology
Article 26, Volume 13, Issue 4, December 2020, Pages 267-274    PDF (508.95 K)
Document Type: Original Article
DOI: 10.21608/eajbsa.2020.139474
Authors
Kholoud, A.E. Ibrahim1; Zahia, K. Moustafa1; Sondos, A.E. Mouhamed2; Dalia Mohamad Mahmoud3
1Department of Entomology, Faculty of Science, Ain Shams University, Egypt, Cairo 11566 Egypt
2Plant Protection Research Center, Giza, Egypt, Cairo
3Department of Entomology, Faculty of Science, Ain Shams University, Egypt, Cairo
Abstract
Plant protease inhibitors) PIs) are one of the plant strategies to maintain favorable growth and survival. Soybean trypsin inhibitor is the most well-known of the plant serine proteinase. The present study aims to detect the inhibitory activity of two concentrations of partially purified trypsin inhibitors from seeds of soybean(Glycine max). Comparing the results of feeding larvae on partially purified soybean inhibitors with control, revealed that the larval weight reduction caused by soybean PI was noticed after seven days of treatment. The highest larval weight reduction was obtained due to treatment with SPI at levels SPI 30% and SPI 60%, and there was no significant difference between the two levels. Feeding larvae on SPI 60% caused higher larval mortality about 20% than the control followed by SPI 30% which caused 16% larval mortality. The pupation in treated larvae was delayed two days by comparing to control. The highest weight reduction in pupal weight was 3.5± 0.3 gm at SPI 60% compared with control. Besides, the pupation rate decreased from 83% at SPI 60% to 80% at SPI 30%. Also, the reduction in adult emergency % was recorded at SPI level 30% by 41% and at SPI level 60% by 16% compared with the control. Results reveal that soybean protease inhibitors inhibit the growth and development of S. littoralis, and may be used in integrated pest control strategies.
Keywords
Protease inhibitor; Spodoptera littoralis; biological activity
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