Tungro Disease: Causal organism: Rice tungro bacilli from virus (RTBV) AND Rice tungro spherical virus (RTSV). Symptoms: · Infected plant show discolouration of leaves. · This discolouration is yellow and start from the tip of the leaf. Then extend towards the base of the leaf. · Infected plants remain stunted have less flowering, sterile or…
Bacterial blight disease: Causal organism: Xanthomonas Oryza. Symptoms: Following the different stages symptoms of bacterial blight disease in rice plant a. On seedling- · initially leaves turn greyish green and roll up later on leaves turn yellow to straw colour. · Finally leaves die leading to witting / death of seedling. · The symptoms of…
Sheath Blight Disease Causal organism: Rhizoctonia Solani Kuhu. Symptoms: · In sheath blight disease of rice, the leaf discoloration starts from tip. · Leaf become yellow or orange yellow. · Rust colour spots develop on the leaf sheath specially on the leaf near of water line. · Special resting structure sclerotia are formed on these…
False Smut Disease: Causal organisms: Ustiloginoidea virens Symptoms: · False smut disease symptoms are seen on panicle stage. · Individual grains are transformed into mass of yellow coloured spore. · Only few grains in panicle are affected and remaining are normal. · Initially these smut walls are small and later on it increase…
BROWN SPOT DISEASE Causal organism: Helminthosporium Oryzae / Drechslera Oryzae Symptoms: · Brown spot disease symptoms in rice occurs on nursery as well as on main crop. · Round or oval brown colored spots are formed on the leaves. · Spots measures 0.5-2.0mm in breath and resemble sesame seeds. · Spots are eye shaped…
RICE BLAST DISEASE: Causal Organism= Pyricularia oryzae cavara Symptoms= · The rice blast disease fungus may attack the crop at all level of crop development. · These symptoms appear on leaves, nodes, rachis, and glumes. · Minute brown specks on the leaves that grown to become larger brown spots. · Orange- yellow tips on older…
