Formulation of the bark extract of Michelia champaca to control Curvularia leaf spot in rice (Oryza sativa L.)
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Abstract
The formulation of a botanical fungicide with the active ingredient of Michelia champaca bark extract to control the growth of Curvularia verruculosa, which causes leaf spot disease in rice plants in the greenhouse was investigated. The results showed that the formula for M. champaca bark extract at a concentration of 1.5% (w/v) was reduced the disease intensity of Curvularia leaf spot by up to 66.01% at 24 days after application. This formula was also able to increase the number of tillers and leaf chlorophyll levels by 40.05% and 41.18%, respectively at 63 days after planting. The formula of M. champaca bark extract at a concentration of 1.5% (w/v) increased the yield of harvested dry grain by 89.26%.
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