How to control the main diseases of rice in the middle and late stages? Here are the key control points
Damage symptoms: Symptoms appear in the late seedling stage and become obvious at the peak tillering stage. Diseased plants are stunted, with light green leaves; small yellowish-white spots appear on the leaves, round or oval, often forming lines; after booting, diseased plants are significantly stunted, with plant height less than one-half that of healthy plants. Leaves are short and thick, and the central leaf is yellowish-white, sometimes curved or twisted...
1. Control of rice blast: focus mainly on leaf blast and neck blast. ① Control of leaf blast: use 20% tricyclazole wettable powder 100 g per mu, or 75% tricyclazole wettable powder 25 g per mu, or thiocyclazole 150 g-200 g per mu and other agents, mix with 60 kg of water and spray for control, once every 5-7 days, for two consecutive applications. ② Control of neck blast: the key period is the boot splitting stage; choose 75% tricyclazole wettable powder 30 g per mu or 40% Fuji One EC 150 ml per mu, or 21.2% Jianshourebi 100 g per mu, mix with 60 kg of water and spray for control, once every 5-7 days, for two consecutive applications. 2. Control of rice false smut and sheath blight: the best period for controlling both diseases is from booting stage to heading stage. At the booting stage, choose: validamycin 50 g per mu + 15% triadimefon 100 g per mu; or 75% Daogu Wenkuling wettable powder 40 g per mu, or 30% Jiemiao EC 20 ml per mu, mix with 60 kg of water and spray for control; at the rice boot splitting stage, in combination with neck blast prevention, apply once broadcast tricyclazole + validamycin + triadimefon, or apply mibemycin or Aimiao EC, to control both rice false smut and sheath blight.