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- Title
EVALUATION OF MAIZE GENOTYPES FOR RESISTANCE TO RICE WEEVIL, SITOPHILUS ORYZAE (COLEOPTERA: CURCULIONIDAE).
- Authors
Padmasri, A.; Srinivas, C.; Jayanth, B. V.; Pramod, M.
- Abstract
Varietal screening of 35 maize genotypes against rice weevil, Sitophilus oryzae (L.) was carried out at Seed Research and Technology Center, Rajendranagar. The resistance or susceptibility of genotypes was assessed based on the susceptibility index, percent seed damage and percent weight loss. The results indicated that none of the genotypes was resistant to rice weevil attack. Among the 35 maize genotypes BH 412055 (2.67) and BML 14 (4.81) were categorized as moderately resistant while genotypes CM 118 and DHM 117 were categorized as susceptible. The percent seed damage in maize genotypes varied significantly and ranged from 3.15 to 95.5 per cent. The significantly lowest percent of damaged seeds was recorded in BH 412055 (3.15%). The significantly highest percentage of damaged seeds was recorded in CM 118 (95.5%) followed by DHM 117(66.00%). Weight loss in different genotypes ranged between 0.48-35.00 per cent. A significant minimum loss in seed weight was observed in BH 412055 (0.48%). In the present investigation, moderately resistant genotype BH 412055, which was least preferred by rice weevil for oviposition, adult emergence recorded relatively less weight loss of seed can be used in a varietal improvement program to improve maize protection in storage.
- Subjects
RICE weevil; GENOTYPES; BEETLES; CORN; CURCULIONIDAE; CORN seeds; PYRICULARIA oryzae
- Publication
Journal of Experimental Zoology India, 2023, Vol 26, Issue 2, p2149
- ISSN
0972-0030
- Publication type
Article
- DOI
10.51470/jez.2023.26.2.2149