Rice yield reduction, and potassium deficiency symptoms to stay temporarily. Lack of potassium in rice leaves to show symptoms are symptoms, yellow at the end of the leaf. The disease resistance of rice growth and yield.While the soil nitrogen quantity exceed the requirements of the plant but potassium not enough. It was found that disease of rice, many types of the outbreak of violence including brown leaf spot disease (Bipolaris oryzae) leaf struck fine sugar (Cercospora's oryzae).(Xanthomonas oryzae) disease leaf burn dry (Rhizoctonia solani) sheath rot disease (Sarocladium oryzae) stem rot disease (Helminthosporium. Sigmoideum) and fungal disease (Pyricularia oryzae) for brown leaf spot disease (brown spot disease) caused by the fungus, Bipolaris oryzaeIn acidic soil, cause of disease severity increased. This fungus is blown in the wind. When the deal on the grain is not old, will grow to destroy, seeds are brown spots, หรือดำ When the seed is to seedling cultivationLeaf spot Brown ellipsoid muscle has wound about the size of 2 × 5 m.M. the fungus can also destroy the rice in the other), but under the condition of cultivation will find that B fungi. Oryzae the conidia are slim. This fungus is in use for the selection of resistant varieties.
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