In the prevention and control of wheat pests and diseases, many farmers often do not see the pests and diseases, do not apply the medicine, miss the best prevention period, and have a serious impact on the yield of wheat.
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For example, in mid- May this year , the author received a lot of peasant friends to reflect that the wheat field appeared a piece of white spikes, dried seeds, and I did not know what disease. After an investigation by an expert from the Shandong Academy of Agricultural Sciences, it was diagnosed as sheath blight. Low temperatures and heavy rain are the main causes of the disease. At the same time, the author discovered during the visit that the disease of some plots was only sporadic. According to the farmers, the seed dressing was used at the time of sowing.
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Experts pointed out that the prevention and control methods of wheat diseases include seed treatment during the planting period to reduce the number of harmful bacteria in the soil; second, spraying the fungicide prevention before the rainy season or wheat jointing and heading.
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Rhizoctonia solani is present on the surface of seeds and in soil. For thorough prevention, the best way is to dress. The seed dressing agent is convenient to use, can simultaneously control a variety of pests and diseases, reduce the base of pests and diseases from the root causes, and reduce the harm of pests and diseases during the whole growth process of wheat. Therefore, seed dressing has a good effect on this year's popular sheath blight, and some land plots are not serious.
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When farmers buy seed dressings, they must choose the seed dressing products that are officially registered in the Ministry of Agriculture. Otherwise, there will be safety problems when using them, and it will be difficult to get compensation.
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Experts suggest that seed dressing should be the preferred seed dressing for seed treatment, from the source to control various pests and diseases of wheat, and later decide whether to re-medicate according to the severity of pests and diseases. General control of wheat aphids, golden worms, and cockroaches can be controlled by imidacloprid, thiamethoxam, fipronil and other pesticides. Prevention and control of wheat sheath blight, root rot, and total etch disease can be controlled by seed dressing with difenoconazole, tebuconazole and other agents. It can also be used as a mixed seed dressing agent for insecticidal sterilization. It is more effective for both pests and diseases. For example, 26% difenoconazole and imidacloprid ( Jiqiao ) , the Ministry of Agriculture is registered to control wheat aphids and Disease, mix and prevent, recommended to use.
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Source: Hebei Science and Technology News
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