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Study of the effect of neem leaves powder and orange peels powder on weevil growing on maize grains

Archana Kumari* & Amrendra Kumar Jha
University Department of Botany, Jai Prakash University, Chapra, Bihar, India
Received : 15th October, 2021 ; Revised : 15th December, 2021

Abstract– A laboratory study with the purpose of investigating the effects of neem leaf and orange peels powder against Sitophilus zeamais, (Coleoptera: Curculionidae) was conducted at Department of Botany, J. P. University, Chapra, Saran. Three sets of testing were set including treatment of seeds with two different plant powder extracts such as Orange peels powder and neem leaf powder and a control where no plant powder were applied to the grains. The dosage of powder, 5g, 10g, 15g, 20g, 25g, and 30g were applied to 500 grains included weevil mortality, survival and grain damage. In view of the percentage of mortality, the toxicity of powder’s increased gradually with increasing concentration. The dead adult weevils were counted within 6 weeks after the maize was treated by neem leaf powder and orange peels powder. The results from the study showed that the highest percentage weevil mortality was recorded for neem followed by Citrus. The lowest and highest mortality rate have been seen of 5g & 30g for neem extract of 24 & 28 respectively, where of these value was noticed of 4 & 8 at 30g & 5g respectively for Citrus extracts. The percentage calculated 80 & 93.3% of 5g & 30g of neem extract whereas 73.3 % & 86.6% for Citrus extract respectively.

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