Bio efficacy of Eruca sativa oil against Callosobruchus chinensis on chickpea

Abstract

Pulse beetle, Callosobruchus chinensis L. responsible for destroying qualitative and quantitative losses to most stored grains. Once the damage done by the beetle, the grains lose their nutritional and germination capacity and become unfit for either consumption. Seed treatment still mainly relies on heavy synthetic chemicals which cause residual effect and threaten public health. However, the natural plant products containing insecticidal activity have recently displayed a great scope as they tend to come up with low mammalian toxicity, less effect on environmental and broad public adoption. Therefore, an experiment was conducted with variable doses of Eruca sativa L. seed oil (0.5 ml, 1 ml, and 1.5 ml) against C. chinensis. The data were recorded for corrected mortality, repellent effects, and seed protectant at different intervals (24, 48, 72 hrs and 1 week). We found the higher corrected mortality (32.65%) at 1.5ml after 24 hrs. Later, the mortality percentage decreased at different intervals but remained higher at maximum dose of E. sativa. However, the overall highest mortality of C. chinensis was 50.00% at 1.5 ml and the lowest 41.00% at 0.5 ml. Meanwhile, the index showed repellent effect with R.I value