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Chemical Control of Alternaria brassicae (Berk. Sacc.) Causing Leaf Spot of Cabbage (Brassica oleracea L. Var. Capitata)

Keywords: Cabbage , leaf spots , alternaria brassicae , fungicides

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Alternaria brassicae (Berk. Sacc). was isolated from the leaves of cabbage and were identified on the colony characteristics and morphology of conidia. Four fungicides: Dithane M-45, Topsin-M, Liromanzeb, and Vitigran blue were applied. Vitigran blue significantly inhibited the colony growth of Alternaria brassicae followed by Dithane M-45. The number of leaf spots on inocculated leaves were reduced by spraying Vitgran blue followed by Dithane M-45. It is recommended that leaf spots can be controlled by pre-application of both Vitgran blue and Dithane M-45 fungicides.


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