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Surface coating of cowpea seed with certain vegetable oils for protection from pulse beetle


Journal of Maharashtra Agricultural Universities 12(1): 76-78
Surface coating of cowpea seed with certain vegetable oils for protection from pulse beetle
The efficacy of nine commonly available oils and five crude non-edible oils was tested on cowpea [Vigna unguiculata] against the pulse beetle (Callosobruchus maculatus, F). A definite potential of protection was exhibited by non-edible oils. Reduction in oviposition was noticed with all except soybean oil Neem seed oil extract and sesamum oil caused the least oviposition. All non-edible oils except raranj were clearly ovicidal. Mustard, niger and sesamum oil showed moderate ovicidal action. No adults emerged from seed treated with non-edible oils, suggesting larvicidal action. Sesamum oil was highly toxic among the edible oils. The growth index of the beetles in treatments with non-edible oils was zero. Low growth indices were noticed when treated with sesamum, mustard and niger oil. Olfactometer studies revealed that all the oils exhibited some degree of repellency. Neem oil and neem seed extract were highly deterrant to oviposition.


Accession: 006546797



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