How to control rice leaf curler
Rice leaf rollers include rice bracts and rice leaf rollers. 34% propyl fluoride EC is a new generation insecticide to control rice leaf curl. It has wide insecticidal spectrum and stable efficacy. The field experiment shows that spraying 40 kg 50ml / mu with water at an interval of 23 days has a control effect of more than 95%. Compared with conventional drugs, the control effect is less than 2 times, the cost is reduced by more than 50%, and 3 times of labor can be saved. Give full play to the role of saving labor and cost, improving quality and increasing efficiency.
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How to Control Rice Grain smut
Symptoms are also known as smut, rice ink smut, Wumigu and so on. Distributed in the Yangtze River Basin and the south of China, it mainly occurs from flowering to milk ripening stage of rice, only injuring grains, one or several grains per panicle or even dozens of grains per panicle, usually showing disease when rice is near maturity. The infected rice grain is dark green or yellow, with black powder in it, the abdomen is split at maturity, showing black powder, there is a black tongue protruding between the inner and outer glumes of the diseased grain, and there is often black liquid exudation, polluting the appearance of the grain. Peeling away the diseased seeds, it can be seen that some or all of the seeds turn into black powder.
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How to control rice white-backed planthopper
The scientific name Sogatellafurcifera (Horv6th) belongs to Homoptera, Homoptera. It is distributed in Yingbai and rice growing areas of China. Host rice, English white, corn, barley, wheat, sugarcane, sorghum, barnyard grass, Kentucky bluegrass and so on. The damage characteristics are the same as those of brown planthopper. Morphological characteristics the long-winged male is 3. 2-3.8mm long, light yellow with black and brown spots. Protrusion of the top of the head, forechest and middle thoracic dorsal plate lateral ridge with 1 crescent dark brown spot behind the compound eye, black and brown in the lateral area of the middle thoracic dorsal plate.
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