Rice sheath blight dataset

Sheath blight, also known as moire disease, flower stalk, rotten foot plague, eyebrow spot. Rice sheath blight is a serious disease in southern rice areas, ranking first among the 'three major diseases' (rice blast, bacterial blight, sheath blight). In all rice areas, no matter what kind of rice varieties are infected. Several lesions fused to form large lesions in severe cases, showing irregular moire patches, often leading to leaf yellowing and death. The lesions on the leaves were moired, the edges were yellowish, the lesions were dirty green when the disease was fast, the leaves rotted quickly, the symptoms of stem damage were similar to those on the leaves, and the later stage was yellowish brown and easy to break. The disease prevented rice from heading, or resulted in more grains and reduced grain weight. [Control methods] [Removal of bacterial sources] Most sclerotia float on the surface of rice seedling field or Honda tillage irrigation rake, mix in the 'wave residue' and are blown by the wind to the corners and fields. They are salvaged with nets or dustpans and taken out of the field to burn or bury deeply. Returning diseased straw and immature diseased straw to the field without direct use and weeding at the edge of the field can reduce the source of bacteria and alleviate the early onset of disease. [Strengthen fertilizer and water management] According to rice growth period, weather, water level of paddy field, soil properties and water conservancy conditions, rational drainage and irrigation, water control disease, thoroughly change the environment of long-term deep irrigation and high humidity, achieve shallow water rooting, thin water raising embryos, wet long panicles, among which timely drainage and irrigation management of shelving (drying) fields and dry wet irrigation in the late tillering stage to jointing stage should be carried out. Low inter-plant humidity can promote the growth of rice plants, and has a significant effect on controlling sheath blight. For deep mud field, cold soaked field and fertilizer field, heavy sun should be applied, for sandy field, and for paddy field with vigorous seedlings and early closure, it should be put aside separately. Nitrogen, phosphorus and potassium should be applied together so as to combine farm manure with chemical fertilizer, long-term fertilizer with quick-acting fertilizer, and avoid partial application of nitrogen fertilizer and large-scale application of nitrogen fertilizer in the middle and later stages. [Cultivating disease-resistant varieties] Although no high-resistant and immune varieties have been found, there are differences in resistance among varieties, and some moderate-resistant varieties can be planted in areas where the disease is particularly serious. In addition, modern molecular biological methods should be actively used to create disease-resistant materials and introduce exogenous disease-resistant genes into rice varieties. [Scientific use of drugs to improve the effect] The application of chemical agents has the most direct and effective advantages in controlling rice sheath blight. In production, the key to improve the control effect of rice sheath blight is to strictly follow the occurrence trend of Rice Sheath Blight in the field and select the right varieties and concentration of pesticides. At the same time, new pesticide varieties and control technologies should be actively introduced and developed to delay the emergence of resistance. [pesticide control] silicon fertilizer was applied to improve plant resistance to disease. In the 10.1 leaf stage (11 leaf varieties) and booting stage of rice, 75% butazolidin and oxime methyl water dispersible granule 15-20 g / mu, or 24% thiopuramide suspension 15-20 ml / mu, or 30% phenoebazole and pvoxazole emulsion 15-20 nm / mu, 15 liters of water (knapsack sprayer) or 7-8 liters (mist sprayer) were sprayed and sprayed. The shallow water layer is sprayed to the middle and lower leaf sheath of rice.