International Journal of Multidisciplinary Research and Development

International Journal of Multidisciplinary Research and Development






ISSN Online: 2349-4182
ISSN Print: 2349-5979


International Journal of Multidisciplinary Research and Development
International Journal of Multidisciplinary Research and Development
Vol. 2, Issue 4 (2015)

Effects of compost amendments on the suppressiveness of Ralstonia solanacearum (Smith) Yabuuchi on potatoes in western Highland of Cameroon


Nibod Columbus TITA, Djeugap Fovo Joseph, Afeanyi Azia Theresia

The study was conducted to evaluate the effects of compost on bacterial wilt of potatoes. Six compost amendments were built using 3 grass species (Ageratum haustonianum, Pennisetum purpureum, and Tithonia diversifolia) and 2 animal dung (cow dung and poultry manure).The trial had 7 compost types (treatments): 6 treatments with different composts at 50% and sterilized soil (control). The experimental layout was a complete randomized design with 10 replicates. Potato plants were inoculated 30 days after planting with 30 ml of bacterial suspension at 109 cfu/ml per plant and evaluated weekly for wilt incidence and severity. Fluorescent bacterial populations of compost were quantified 24 h after plating on MacCkonky agar. Physicochemical properties of soil and composts were analyzed. Bacterial wilt incidence and severity were significantly reduced with the incorporation of compost irrespective of the compost type. The most suppressive compost to bacterial wilt was T. diversifolia and poultry manure (disease incidence: 7.5% and disease severity: 1.3%), with the highest population of fluorescent bacteria (20 x 1011 cfu/ml). The study suggests that T. diversifolia and poultry manure compost could be incorporated to an integrated control strategy of bacterial wilt on potato. The antagonistic bacteria in T. diversifolia + poultry manure compost will be studied later
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