which may be completely destroyed. Severe infestations sporadically occur on transplanted rice and can kill the plant. When the plants survive, they usually recuperate and produce some grain. However, damaged plants often mature late. They are generally most abundant during the rainy season. Rice Yellow Mottle Stunting of rice plants Can use synthetic Use resistant/tolerant varieties NERICA 4 and 6, NARIC 1 and 2 insecticides containing Virus (RYMV) Rouging infected plants only when infestation is low Reduced tillers pyrethroids like Do not ratoon crop to avoid disease carryover Deltamethrin to control the Yellowing and mottling of leaves Vector control flea beetle vector. Infected plants easily attacked by A preventive seed treatment other diseases with Thiamethoxam Rice blast –Leaf and Most destructive Use application of synthetic Resistant varieties like Gold fungicides Neck blast Avoid excess nitrogen fertilizer Removes photosynthetic tissue containing Fungicides may not be economic to use Pyricularia oryzae from leaves, stems and gains Mefenoxam, Mancozeb, Difenoconozole where cost Magnaporthe grisea Reduces yield by up to 50% or effective. more
which may be completely destroyed. Severe infestations sporadically occur on transplanted rice and can kill the plant. When the plants survive, they usually recuperate and produce some grain. However, damaged plants often mature late. They are generally most abundant during the rainy season. Rice Yellow Mottle Virus (RYMV) Stunting of rice plants Reduced tillers Yellowing and mottling of leaves Infected plants easily attacked by other diseases Use resistant/tolerant varieties NERICA 4 and 6, NARIC 1 and 2 Rouging infected plants only when infestation is low Do not ratoon crop to avoid disease carryover Vector control Can use synthetic insecticides containing pyrethroids like Deltamethrin to control the flea beetle vector. A preventive seed treatment with Thiamethoxam Rice blast –Leaf and Neck blast Pyricularia oryzae Magnaporthe grisea Most destructive Removes photosynthetic tissue from leaves, stems and gains Reduces yield by up to 50% or more Resistant varieties like Gold Avoid excess nitrogen fertilizer Fungicides may not be economic to use Use application of synthetic fungicides containing Mefenoxam, Mancozeb, Difenoconozole where cost effective.
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