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 field. Spraying 2: 1: 500 Bordeaux solution in Honda period has a certain control effect, and the control effect is better if the above chemicals are applied once every 7 to 10 days after the first application. In order to prevent man-made transmission, it is best to use motorized sprayer.
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How to control rice Phytophthora?
Rice Phytophthora: the diseased field should be drained and sunburned in time, which can effectively restrain the spread of the disease. The key point of chemical control is to protect the seedlings of early rice at 3-leaf stage. Generally speaking, the medicine should be applied before or after anti-cold irrigation. The medicaments are: 50% carbendazim 1000 times solution; 50% topiramine or 50% benzoate 500 times solution; 40% Phytophthora net 500 times solution. ...
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Key points of Prevention and Control of main Diseases in Middle and late stage of Rice
Symptoms of damage: symptoms appeared in the later stage of seedling field, and the symptoms were significant in the peak tillering stage. The diseased plant is dwarf, the leaf color is light green; the yellow-white dot on the leaf is round or oval, often connected into a linear shape; after booting, the diseased plant is significantly dwarfed, and the plant height is less than 1/2 of the healthy plant. The leaves are short and thick, and the heart leaves are yellow and white, sometimes bent or twisted.
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