SUSCEPTIBILITY OF CERTAIN IRRADIATED AND NON- IRRADIATED COWPEA VARIETIES TO INFESTATIO WITH Callosobruchus maculatus (F.) | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 9, Volume 28, Issue 3, March 2003, Page 2317-2325 PDF (679.08 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2003.243145 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Mai El-Degwi, | ||||
| National center tor Radiation Research and Technology (NCRRT) P.O. Box 29, Nasr City, Cairo, Egypt. | ||||
| Abstract | ||||
| Seeds of four Irradiated and non- irradiated cowpea varieties were evaluated according to their susceptibility to infestation by Cal/osobruchus mac latus to determine the relationship between seed variety and susceptibility level. n mber of eggs laid, hatchability, failure of larv •• : instars to penetrate the seed testa, duration of development, number of emerged adults and rate of survival, sex ratio. dead larvae within the cotyledon and impact of infestation on weight loss. Obtained results indicated that Ihere were different changes in the biological properties of this pest, among the Irradiated and non- irradiated four cowpea varieties. The radiation doses causing remarkable increase in Internal mortality In all varieties. The relativery resistant variety 8alady showed the highest level of mortality. Azmerly and DOkki were less resistant while, Karem 7was moderately susceptible. However non- irradiated Balady and Dokki varieties showed moderately susceptible, Azmerly and Karem7 were susceptible. II could be concluded that the susceptible 0 cowpea varieties was radiation dependent. | ||||
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