Rice brown spot dataset

Rice flax spot. Rice flax leaf spot occurs in all rice regions of China, which mainly endangers rice. From seedling stage to harvest stage, the disease can occur, and the above-ground parts of rice plants can be damaged, mostly leaves. Leaf damage was initially small brown spot, then expanded to oval brown spot. Because of the size of flaxseed, it was called flaxseed spot. The edge of the lesion is obvious, and there are often yellow halos around it. The center of the lesion is gray-yellow or gray-white in the later stage. In severe cases, the lesions are dense and often combined to form large irregular spots. The lesions on grains are similar to those on leaves, and can be extended to whole grains. When the humidity is high, a large number of black villous mildew layers are produced on the glume joints and the surface of grains. The symptoms of panicle neck and branch injury were similar to rice blast, but the diseased part was dark brown and the discolored part was longer. The disease is easily confused with rice blast, and there is no necrotic line at both ends of the lesion, which is an important difference from rice blast. [Control methods] {Control methods}. [Seed treatment] Soak seeds in 1000 times liquid of 40% Kewensan Emulsion or 50% Carbendazim Wettable Powder for 2 days. [Agricultural control] The straw in the diseased field can not be returned directly to the field. Strengthen fertilizer management, achieve sufficient base fertilizer, early topdressing, organic fertilizer and phosphorus, potassium fertilizer combined application, especially in potassium-deficient fields to increase the application of potassium fertilizer. Early shallow water irrigation, timely and moderate roasting field, later dry-wet alternation, so that rice seedlings mature to old. [Pharmaceutical control] At seedling stage, rice blast Ling (Chunlaimycin) was used to control the disease. After transplanting, the rice sprout was sprayed together with the combination of trichoderin and Tricyclazole.