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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/14519

Title: The efficacy of neem seed oil extract and vegetable oil as insecticides for cowpea–weevil (callosobruchus maculatus) control
Authors: Abanga, Paul
Bonaventure, Kissinger Maalekuu
Keywords: Neem Seed Oil
Vegetable Oil
Issue Date: 28-Jul-2021
Abstract: Callosobruchus maculatus, a major storage insect pest of cowpea, lays its eggs on the pods or sometimes on the seeds both in the field and in storage. The larva perforates the seeds and completes its life cycle there. It can cause loss, if not controlled in time. Other pests are Maruna spp and Laspeyresis spp. Storage pests are controlled by the use of recommended insecticides, vegetable oils, fumigation or heat treatment to the stored seeds. The objective of this project was to examine the effect of neem oil treatment on cowpea weevils as an alternative for preserving cowpea at storage. The experimental design for the study was Completely Randomized Design with three replications. Data collected included; grain damage, insect mortality; weight loss and number of survived insects. From the results, insect mortality was 100% for treated cowpea seed samples compared to the untreated sample; the control. The results indicated that the control treatment recorded high weight loss of 110 g, 240 g and 350 g for storage months of 1, 2, and 3 compared to the neem oil treatment [100:0] recording the lowest of 10 g, 20 g and 30 g for storage months 1, 2, and 3. The control treatment had the significantly highest percentage of seeds with holes of 36.87 %, 69.54 % and 94.67 % for storage months 1, 2, and 3 compared to the neem oil treatment which recorded 11.09 % 11.10 % and 11.16 % for storage months 1, 2, and 3 respectively. Study concluded that neem seed oil should be used to store cowpea grains to reduce weevil infestation.
Description: A dissertation submitted to the School of Graduate Studies, Kwame Nkrumah University of Science and Technology, in partial fulfillment of the requirements for the Award of the Mphil Post-harvest Technology Degree .February, 2019
URI: http://hdl.handle.net/123456789/14519
Appears in Collections:College of Agric and Natural Resources

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