Article Number: DRJAFS17138933
DOI: https://doi.org/10.26765/DRJAFS17138933
ISSN: 2354-4147

Vol. 10(11) Pp. 262-267, November 2022

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Original Research Article

Assessment of the Toxicity of some Indigenous Plant Extract on Control of Callosobruchus chinensis (L) in Pigeon Pea Seeds

Olufelo, Joseph Olusola*

Olayinka, RachaeL Bolanle


Abstract

Pests of minor pulses can all be controlled most successfully with synthetic pesticides. However, integrated pest management strategies for pulses are being developed in light of the negative effects of pesticide residues in the seed quality, environmental pollution, and harm to natural enemies associated with the use of synthetic pesticides. The purpose of this study is to assess the insecticidal potential of two indigenous plant extracts and synthetic dust against callosobruchus chinensis in pigeon pea seeds. For the control of Callosobruchus chinensis, two botanicals, Eucalyptus globules and Carica papaya, were used in combination with synthetic dust in various treatment combinations. The Callosobruchus chinensis used was derived in the laboratory from a colony originating from heavily invested pigeon pea seeds, while clean NSWCC-18 pigeon pea seeds were obtained from Institute of Agricultural Research and Training, Ibadan, Nigeria. The botanical plant extracts were obtained from an Owerri herbal store. They were oven-dried at 60°C for 48 hours before being ground to a powder in an electric mill. The synthetic dust (Terbufos and Cyfluthrin) was applied at a fixed rate of 0. l g, whereas the botanical dust was applied at 0.02, 0.04, 0.06, 0.08, and 0.10 g/ 20 seeds. Both synthetic dust and plant extracts were used individually and in combination. We tracked Callosobruchus chinensis mortality over periods of 12, 24, 48, and 72 hours. The findings demonstrated that Callosobruchus chinensis adult mortality was completely caused by a sublethal dose of Terbufos. The study also showed that mixing synthetic organic insecticides with a small amount of insecticidal substances has a great deal of potential for lowering the rate at which they are applied. The findings demonstrated that a sub-lethal dose of C. papaya (0.08g) powder combined with Terbufos (0.1g)/20grams of pigeon pea seeds produced 100% adult mortality of C. chinensis at 72 h post-infestation and was therefore advised at a dose of insecticides. However, it is advised that farmers store pigeon pea seeds after harvest and mix a sub-lethal dose of C. papaya (0.08g) powder with Terbufos (0.1g)/20 grams of pigeon pea seeds to maintain the best quality possible.

 

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Keywords: integrated pest management, storage pest, stored seeds, insecticidal plant, seed quality, synthetic powder


 Received: October 7, 2022  Accepted: November 3, 2022  Published: November 15, 2022


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