Screening of Major Cereal Grain Genotypes Against Major Insect Pests Under Storage Condition
- M.Sc. (Agri)
- Dharwad University of Agricultural Sciences 2024
- 164 32 Cms
ABSTRACT Investigations on screening of major cereal grain genotypes against Sitophilus oryzae L. and Corcyra cephalonica S. under storage condition and evaluation of seed protectants against these two pests were carried out under storage condition at the Department of Entomology, College of Agriculture, Vijayapura, Karnataka during 2022-2023 and 2023-2024. Five genotypes of each cereal crop such as rice, wheat, maize and sorghum were evaluated. Based on the observations recorded by the susceptibility index, the genotypes rice (Abhilash), wheat (UAS 428), maize (NK 6240) and sorghum (M 35-1 and AKJ 1) were found to be resistant in terms of lower percentages of seed damage, seed weight loss and adult emergence over three months of storage. In contrast, the genotypes rice (MGD 101, PSB 68, Mugad SIRI-1253 and Mugad Sugandh), wheat (UAS 304, UAS 3020, UAS 334 and UAS 375), maize (GH 150125, DKC 9133, African tall (Fodder maize) and GH 0727 (Shrushti) and sorghum (DSV 6, SbABM and BJV 44) were found to be susceptible to moderately susceptible. In evaluating the efficacy of various botanicals against Sitophilus oryzae L. and Corcyra cephalonica S. over two months, sweet flag rhizome powder at 5 per cent concentration proved to be the most effective, resulting in no seed damage, no grain weight loss and no adult emergence followed by treatments with boric powder and custard apple seed powder at 5 per cent. For Corcyra cephalonica S., sweet flag rhizome powder, boric powder, custard apple seed powder and neem leaf powder at 5 per cent resulted in minimal percentage of seed weight loss and adult emergences. However, treatments with eucalyptus leaf powder, pomegranate rind powder and palm oil were associated with maximum infestation for both insect pests.