The Effect of Different Doses of Lambda-Cyhalothrin on Aphis Craccivora Koch (Homoptera:Aphididae) Infestation Levels and Yield of Three cowpea Cultivars (Tona, Nhyira and Asetenapa) in the Forest-Guinea Savannah Transitional Zone (Wenchi Municipality), Ghana

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2013-4-16
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Cowpea(Vigna unguiculata) is one of the important grain legumes widely cultivated in semi arid areas of the tropics and subtropics for human as well as animal consumption...
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A thesis submitted to the Department of Theoretical and Applied Biology. College of Science in Partial fulfillment of the requirements for the Award of Master of Science Degree (Environmental Science).
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