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Rice diseases 2

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University of Agriculture Faisalabad
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Host range ◆ Aside from the rice plant, the disease survives in: ◆ citrus, ◆ cruciferous vegetables, ◆ Lettuce, ◆ Tomato, ◆ Chilli ◆ Carrot ◆ cucurbits, ◆ legumes, ➢Groundnut ➢Soybean ➢Cotton ➢Sorghum ➢Wheat ➢Barley ➢Maize ➢Tulips Management principles ◆ Seeding rate or plant spacing should be optimized to avoid closer plant spacing or dense crop growth which favors the horizontal spread of the disease. Need-based or real-time application of nitrogen fertilizer is recommended in fields known to have a high amount of inoculum. Management principles ◆ Sanitation, specifically removing of weeds, can help control sheath blight considering that the pathogen also attacks weeds which are commonly found in rice fields. Removal of infected stubbles or crop residues from the field is also recommended to reduce the amount of inoculum for the succeeding cropping season. Management principles ◆ Spraying infected plants with fungicides, such as benomyl and iprodione, and antibiotics, such as validamycin and polyoxin, is effective against the disease. 5. Sheath Rot Causal organism : Sarocladium oryzae Symptoms: Rotted growing panicle are incompletely exerted with numerous empty grains. Infected plants may be infested with stem borers. The disease is usually associated with virus disease infection Sheath Rot Sheath Rot Management Options ➢Use resistant variety. ➢To eradicate seed-borne pathogens causing the disease, use Mancozeb ...
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