For long time storage purpose, two kg of castor (Ricinus communis) is applied in 10 kg of sorghum. This protects sorghum from insects or worms. This practice is used for many years and found to be 90% effective and successful.
Crop Vernacular Name: Jawar, Jwari
Ingredients: Castor
"Application of castor oil at 10 mg kg-1 to mung bean prevented damage by C. chinensis introduced 18 months after treatment (Babu , et al. 1989)."
http://www.fao.org/3/x2230e/x2230e14.htm
"Efficacy of soybean and castor oils in the control of Callosobruchus maculatus (F.) and Callosobruchus phaseoli (Gyllenhal) in Stored Chick-peas ( Cicer arietinum L.)"
https://www.researchgate.net/publication/248283903_Efficacy_of_soybean_and_castor_oils_in_the_control_of_Callosobr uchus_maculatus_F_and_Callosobruchus_phaseoli_Gyllenhal_in_Stored_Chick-peas_Cicer_arietinum_L
"Use of Vegetable Oils as Biopesticide in Grain Protection -A Review"
https://www.researchgate.net/publication/276196395_Use_of_Vegetable_Oils_as_Biopesticide_in_Grain_Protection_- A_Review