author(s)
Subash Sitaula, Kapil Kafle, Bishal Gaire and Arjun Gurung

abstract
The objective of this study was to evaluate efficacy of different botanical against Sitophilus zeamais during storage of wheat grain. The study was conducted at laboratory condition of Lamjung campus, Lamjung at room temperature from January to April 2019. Azadiracta indica, Allium sativum, Curcuma longa, Acorus calamus, Ginger officinale, Piper nigrum, Artemisia vulgaris, Brassica juncea and untreated control was applied as treatments with three replications in completely randomized design. Wheat samples were infested with S. zeamais at a rate of 8 pair adults/40gram and botanicals were applied on 2 percentage (w/w) basis, and stored for 80 days. At 20 days intervals, samples of wheat were sieved followed by weighting for calculation of weight loss. While, infected seed and weevil mortality were recorded by visionary basis. And, germination test was done before and after experimentation. The results of the study revealed that all botanical showed significant effect on weevil mortality and controlling weight loss of wheat than unchecked control at (p<0.05) but, hinder the germination except in sweet flag (95%) and black pepper (95%). Among the botanicals, black pepper was found very effective in the study by securing 100% weevil mortality within 20days, and less infected seed (6.33) and least weight loss (0.323g) at the end of experiment without deterring the germination percentage. However, further research are needed to be carried out to ensure the long term effect in large stores of farmer’s condition.