Varietal Resistance to the Angoumois Grain Moth, Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae) in Wheat Seeds During Storage
22 / 4
Authors
-
M.O. ASHAMO
Division of Entomology, Indian Agricultural Research Institute, New Delhi 110 012
Author
-
S.C. KHANNA
Division of Entomology, Indian Agricultural Research Institute, New Delhi 110 012
Author
Keywords:
Varietal resistance, susceptibility index, Sitotroga cerealella, developmental timeAbstract
Studies on the varietal resistance in wheat seeds to infestation by the Angoumois grain moth, Sitotroga cerealella (Olivier) were carried out in storage. Results showed that PBW 373 was the most resistant (least susceptible) variety showing longest developmental time (37.3 days), least F₁ adult emergence (6.0), least Susceptibility Index (4.9) and lowest weight loss (1.9%). The most susceptible (least resistant) variety was DL 788-2 (highest adult emergence of 23.0, highest SI of 9.3 and highest weight loss of 7.6%). The size of the seeds did not have any effect on susceptibility since there was no significant difference (P > 0.05) in the seed size of the most resistant and most susceptible varieties. There was no significant correlation between susceptibility and seed hardness. Therefore the resistance base in this study was more likely biochemical in nature. Larval to adult developmental time of females (35.2 days) was higher than that of males (33.8 days) while adult males lived longer (8.5 days) than females (7.9 days). The sex ratio showed slightly higher number of females than males.
Downloads
References
1. FAO (1995). FAO 1988-1995. FAO yearbooks and FAO processed statistics series 1, Food and Agricultural Organisation of the United Nations, Rome.
2. NAGARAJAN, S. (2004). Opportunities and Strategies to make Indian wheat globally competitive. In Wheat: Technologies for warmer areas. Proceedings of the second International Group Meeting (IGM) held at Agharkar Research Institute (ARI), Pune, India, (23-26 September 2002). Eds: V.S Rao, Gyanendra Singh & S.C Misra, Anamaya Publishers, New Delhi, 324pp.
3. PEDIGO, L.P. & M.E. RICE (2006). Entomology and Pest Management, 5th edition. Pearson-Prentice Hall, Upper Saddle River, New Jersey, Columbus, Ohio, 749pp.
4. DOBIE, P. (1978). The susceptibility of triticale to post harvest infestation by Sitophilus zeamais Motschulsky, Sitophilus oryzae (L.) and Sitophilus granarius (L.). J. stored Prod. Res., 14: 87-93.
5. ANAND PRAKASH, M., B.S. CHHILLAR., R.K. KASHYAP & A. CECILY (2004a). Deterioration of seed quality due to Sitotroga cerealella (Olivier) infestation in wheat cultivars. Indian J. Ent., 66(3): 191-197.
6. COGBURN, R.R., H.H. HUNG & B.D. WEBB (1989). Survival and development of Sitotroga cerealella (Oliv.) on seeds from species of Oryza other than Oryza sativa L. J. stored Prod. Res., 25: 117-123.
7. WONGO, L.E. & J.R. PEDERSEN (1990). Effect of threshing different sorghum cultivars on Sitotroga cerealella (Oliv.) and Sitophilus oryzae (L.) (Lepidoptera: Gelechiidae and Coleoptera: Curculionidae). J. Stored Prod. Res., 26: 89-96.
8. BHATIA, S.K. (1976). Resistance to insects in stored grains. Trop. Stored Prod. Inf., 31: 21-35.
9. ANAND PRAKASH, M., B.S. CHHILLAR & R.K. KASHYAP (2004b). Studies on the biology of Angoumois grain moth, Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae) on wheat varieties. Indian J. Ent., 66(3): 264-266.
10. HANSEN, L.S., H. SKOVGARD & K. HELL (2004). Life table study of Sitotroga cerealella (Lepidoptera: Gelechiidae), a strain from West Africa. J. Econ. Ent., 97: 1484-1490.
11. CONSOLI, F.L. & B.F. AMARAL FILHO (1995). Biology of Sitotroga cerealella (Oliv.) (Lepidoptera: Gelechiidae) reared on five corn (maize) genotypes. J. Stored Prod. Res., 31: 139-143.
