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随着水稻矮秆多蘖品种的推广,密植程度的提高和施氮量的增加,使纹枯病的发生为害日益严重,已成为水稻高产稳产的重大威胁。据不完全统计,江苏省1986—1988年纹枯病发生面积达8000万亩,约占水稻种植总面积的71%。当前水稻纹枯病的防治对策为“水控药治”,药剂主要是井冈霉素。虽然井冈霉素防治效果颇佳,但每年稻田需全面防治2—3次,有的4次,需花费大量的人力
With the popularization of rice dwarf tiller varieties, the close planting degree and the increase of nitrogen application rate, the occurrence of sheath blight is becoming more and more serious, which has become a significant threat to the high and stable yield of rice. According to incomplete statistics, the area of sheath blight occurred between 1986 and 1988 in Jiangsu Province reached 80 million mu, accounting for 71% of the total paddy planting area. The current prevention and control of rice sheath blight is “water control medicine”, the main drug is validamycin. Although the Jinggangmycin control effect is quite good, but the rice fields need comprehensive prevention and treatment of 2-3 times a year, and some 4 times, it takes a lot of manpower