Evaluation of maize genotypes for resistance to rice weevil, Sitophilus oryzae Linnaeous (Coleoptera: Curculionidae)
Sangeeta Tiwari, Sunita Yadav and Krishna Rolania
An experiment was conducted to study the resistance in fifteen maize genotypes against rice weevil, Sitophilus oryzae (L.) at Chaudhary Charan Singh Haryana Agricultural University, Hisar during 2017-2018 and 2018-2019 under laboratory conditions (28±2 °C and 70% RH). Susceptibility index, percent grain damage and percent weight loss were taken as parameters for this study. The results revealed that maximum pooled mean susceptibility index (5.0) was found in sweet corn against S. oryzae, therefore, it was categorized as moderately resistant genotype while minimum pooled mean susceptibility index (1.6) was recorded for HKi 161, so it was categorized as resistant. The minimum (8.72) pooled mean percent grain damage and minimum (8.26) pooled mean percent weight loss of was recorded in HKi 161 and HQPM 1, respectively. The results of experiment will be useful to improve maize protection in storage and varietal improvement/release program.