Chemical and Biological Management of Leaf Spot and Flower Blight of Marigold
2021
Anand, T.
Marigold (Tagetes erecta L.) is an important commercial and garden flower crop. Alternaria leaf spot and Botrytis flower blight are the significant constraints in marigold cultivation. In this study, different bioagents and fungicides were tested for their efficacy against leaf spot and flower blight of marigold under field conditions. Among the bioagents tested, seed treatment (1%) + foliar spray (0.2%) of Pseudomonas (TNAU-Pf1) at 30 and 45 days after planting (DAP) was found to be effective in controlling Alternaria leaf spot and Botrytis flower blight and also recorded higher flower yield compared to other bioagents. Among the fungicides tested, seed treatment (0.2%) + foliar spray of hexaconazole + zineb (0.2%) was found effective in reducing the incidence of both diseases and recorded higher flower yield followed by pyraclostrobin + metiram (0.2%). • Hexaconazole + zineb and pyraclostrobin+metiram were the best fungicides for effectively managing Alternaria leaf spot and Botrytis flower blight of marigold. • Among the bioagents, Pseudomonas (TNAU-Pf1 was found to be effective in controlling leaf spot and flower blight disease.
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