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Studies on the efficacy of black soap and kerosene mixture on the control of Pod sucking bugs (Clavigralla tomentosicollis stal.) on Cowpea (Vigna unguiculata (L.) Walp)

M. Aliyu,T. Ladan,B.I. Ahmed, J. Abdullahi.


Field experiment testing of various concentrations (2, 4, 6 and 8%vol/vol) of an aqueous black soap and kerosene as a control for pod damage byClavigralla tomentosicollis Stal. indicated that the 8% concentration was themost effective in reducing pod injury and increasing the yield of seed in ‘DanSokoto'cowpeas. None of the treatments significantly reduced the abundanceof the pod sucking insects on the plants. Application of 8% concentrationshould therefore be considered for recommendation as a control to cowpeagrowers.

Key words: Clavigralla tomentosicollis, population, yield, black soap and

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