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Asian Journal of Plant Sciences

Year: 2006 | Volume: 5 | Issue: 1 | Page No.: 91-97
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Authors

Shazia O.W.M. Reuben

Minza Masunga

Rhodes Makundi

Robert N. Misangu

Bukheti Kilonzo

Maulid Mwatawala

Herman F. Lyimo

Christine G. Ishengoma

Dastun G. Msuya

Loth S. Mulungu

Keywords

An investigation to assess the effectiveness of locally available botanicals in the control of cowpea weevil (Callosobruchus maculatus L.) was done in the Department of Crop Science and Production laboratory of Sokoine University of Agriculture Morogoro, Tanzania. The trial was conducted during September 2004-January 2005. The test materials consisted of two commercial cultivars of cowpea namely Fahari and Tumaini; 8 botanical protectants and their combinations and two controls viz., no protectant and standard actellic super dust, making a total of 13 treatments. A split plot experiment in which the two commercial cultivars were the main plots while the 13 protectant treatments comprised the subplots was used as a Randomized Complete Design with four replications. Cultured pest weevils were placed in vials containing cowpea seeds and the respective sub-plot treatments including the two controls; ashes of rice husks, kitchen and cow dung; powders of dried leaves of Tephrosia vogelii, neem, pyrethrum flowers, tobacco snuff, black pepper fruit and their various combinations. Data were recorded after 10 weeks of storage on number of bruchids after treatment, number of holes per seed, numbers of damaged and undamaged seeds. Protectants had varying degrees of effectiveness in controlling the cowpea weevil. Leaf powders of Tephrosia vogelii, tobacco snuff, actellic super dust and combination of leaf powders of neem and Tephrosia vogelii significantly excelled the control of no protectant in controlling the cowpea weevil. Black pepper powder gave significantly better results than the control in suppressing bruchid survival, higher numbers of undamaged seeds and fewer holes per seed. The cowpea cultivars did not differ significantly on the studied traits. Leaf powders of Tephrosia vogelii, tobacco snuff and combination of neem and Tephrosia are effective in controlling stored grain of cowpeas. Black pepper powder can as well be used for cowpea grain storage particularly where the aforementioned botanicals are not available.
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Shazia O.W.M. Reuben, Minza Masunga, Rhodes Makundi, Robert N. Misangu, Bukheti Kilonzo, Maulid Mwatawala, Herman F. Lyimo, Christine G. Ishengoma, Dastun G. Msuya and Loth S. Mulungu, 2006. Control of Cowpea Weevil (Callosobruchus maculatus L.) in Stored Cowpea (Vigna unguiculatus L.) Grains using Botanicals. Asian Journal of Plant Sciences, 5: 91-97.

DOI: 10.3923/ajps.2006.91.97

URL: https://scialert.net/abstract/?doi=ajps.2006.91.97

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