Key points of Prevention and Control of main Diseases in Middle and late stage of Rice
1. Control of rice blast: mainly focus on the control of leaf blast and panicle and neck blast. Control of ① leaf blast: spray 60kg of water with 20% tricyclazole wettable powder 100g? M mu, or 75% tricyclazole wettable powder 25g? M mu, or thiocyclazole 150g-200g? M mu, once every 5 days, even twice. Control of ② panicle and neck rice blast: the critical period is the breaking period. Choose 75% tricyclazole wettable powder 30g / mu or 40% Fuji No. 1 EC 150ml / mu, or 21.2% plus 100g / mu, spray 60kg of water, once every 5 days, even twice. 2. control of rice false smut and sheath blight: the best period for the control of the two diseases is from booting stage to heading stage. In the booting stage, choose: Jinggangmycin 50 g? M mu + 15% triadimefon 100 g? M mu; or 75% rice wettable powder 40 g? M mu, or 30% clean seedling EC 20 ml? M mu, spray control with water 60 kg; in the rice break stage, combined with panicle blast prevention, tricyclazole + Jinggangmycin + triadimefon or rice amide or love seedling EC was applied to control rice false smut and sheath blight.
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How to control rice bacterial brown stripe disease?
Control of rice bacterial brown streak: 20% Yekuning wettable powder 6000 times, 25% Dikushuang 1500 to 2000 times, 20% Shikujing wettable powder 300 to 2000 times (not suitable for use after heading); 1000 to 1500 times of benzoylamine can be used in seedling stage; 2: 1: 500 in this field.
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Symptoms of Fertilizer deficiency and excessive nutrients in Rice
First, the occurrence situation of rice black-streaked dwarf disease was first found in late rice in Guangdong Province in 2001. In recent years, the area of rice in Vietnam and southern China has expanded rapidly, with 9 provinces such as Guangxi, Guangdong and Hunan in 2009, with an area of 5 million mu, which is expected to exceed 10 million mu in 2010.
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