17 Aug Important diseases and pest of marigold
गैंद की खेती मे लगने वाले प्रमुख रोग व कीट पतंग Marigold is relatively free from diseases and insect pests. However, occasionally the following diseases and insect-pests have been observed. Diseases/ Pests Symptoms and damage Managements Damping off Rhizoctonia solani Brown necrotic spots and girdling on the radicle, later on extends to plumule and causes pre-emergence mortality. Infected seedlings are pulled, sterilization of soil with Formalin@ 2% or Captan 2g/ litre of water. Leaf spot and blight Alternaria sp., Septoria sp., Cercospora sp. The minute brown circular and brownish-grey spots appear on the leaves. Spraying fungicides regularly. Collar and root rot Pellicularia filamentosa, Pythium ultimum, Sclerotinia slerotiarum Rotting of root and collar portions is noticed in nursery stage which resulting in wilting of the plant. Soil...