How does Opa work on wheat?
Spraying OPA 50ml/ mu with water at the initial stage of wheat powdery mildew and rust can effectively control powdery mildew and rust by spraying twice with water consumption of 30-45ml/ mu according to the interval of 7-10 days. Spraying OPA 50ml/ mu with water at the early flowering stage of wheat, and applying water for the second time at the flowering stage according to the development of the disease, with a water consumption of 30-45ml/ mu, can effectively control scab. After treatment, the effect is outstanding, and the leaves are thick and green, and the stems are stout.
What kind of pesticide is Opa?
Opa is another fungicide with Xerojian function for field crops in BASF, Germany, and its ingredients are pyrazolyl carbendazim and fluconazole. Fluconazole can be transmitted to the top of the plant through the xylem and has excellent internal absorption function, which can not only provide protection for the whole plant, but also kill the pathogenic fungi that have entered the plant; pyrazolyl methyl spreads nearby over time and permeates into the plant. provide effective protection for the whole leaf.
Opa can effectively control wheat powdery mildew, rust, scab, rice false smut, sheath blight, rice blast, as well as common leaf spot, leaf spot, brown spot and so on.
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What kind of drugs are used for sclerotiorum disease
Sclerotinia sclerotiorum generally uses 50% carbendazim wettable powder 4kg per mu, fully mix an appropriate amount of dry soil on the border surface, and then rake into the soil, the source of primary infection can be reduced. In the early flowering stage, 500 times solution of 70% mancozeb wettable powder, 70% methyl topiramate,
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Specific drug for brown blight of grape ear axis
Spray Baume 3-5 degree stone sulfur mixture, or 45% crystal stone sulfur mixture 30 times, 0.3% pentachlorophenol sodium 1-2 times before bud germination; spray 75% chlorothalonil wettable powder 600-800 times before flowering, or 70% mancozeb wettable powder 400-600 times, or 40% carbendan wettable powder
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