Laboratory studies were conducted at Department of Crop Protection, Agricultural College and Research Institute, Valavachanur – 606 753, Thiruvannamalai District to study the effect of plant powders tested against rice weevil, Sitophilus oryzae infesting sorghum. The experiment on ten plant powders 2 per cent, among them Acorus calamus 2 per cent rhizome powder was found to be significantly the best compared to other treatments. | Effect of ten insecticidal plant powders on rice weevil Sitophilus oryzae L. and grain weight loss in stored sorghum
