Insect infestation and blight affect the crops of rice (Oryza sativa), mustard and lucern causing loss of production. These insects thrive in cold and humid weather. For the control of insects and blight, Ratilal Patel prepares a mix of 1 kg castor (Ricinus communis) oil and 20 kg ashes of dung-cake. This mix should be sprinkled on the crops. The medication shows its effect within 2-3 days. About 80% insects are controlled by this technique. The use of 20 kg of the mix is sufficient for one bigha of land. This is a traditional practice to control insects and blight in crops.
Formulation: Mix one kg castor (Ricinus communis) oil and 20 kg ashes of dung-cake
Ingredients: Castor oil (Ricinus communis), ashes of dung
"Aunty et al. (2006) demonstrated high larvicidal activity of aqueous extracts from leaves of (R. communis) against four mosquito species, (Culex pipiens L.), (Aedes caspius) Pallas, (Culiseta longiareolata) Aitken and (Anopheles maculipennis) Meigen."
"Determination of insecticidal effects of Ricinus communis crudeextracts and blood baited traps with castor oil adhesive onphlebotomine sand flies Medical Parasitology and Entomology in theJomo Kenyatta University of Agriculture and Technology."
"Larvicidal activity of Ricinus communis extract against mosquitoes."
"Insecticidal value of castor (Ricinus cummunis) against termites."