Clear water: The occurrence time of wheat sheath blight and head blight and the appropriate period of control are different. Fusarium head blight occurs mainly during the continuous rainy season of wheat during the flowering season. The appropriate period of control is from the head of wheat to the early flowering stage. The drug is applied before the rain and the spray is mainly sprayed on the ear layer to protect the wheat ears and the stems under the ears. Tebuconazole and cyanocastrobin are the appropriate drug species for the prevention and treatment of the disease. When tebuconazole alone is used to control head blight, the pure drug dosage of about 10 grams of mu can achieve better control effects. Hexazole-ol and prochloraz have certain control effects on scab, but they are generally not used exclusively or individually for the control of head blight.
Rhizoctonia occurs in the spring when the temperature rises in spring, and the appropriate period of control is before the jointing of wheat. Before and after the jointing of wheat, combined with the control of sheath blight, the use of tebuconazole, epoxiconazole, hexaconazole and other drugs, have a better effect on the later occurrence of wheat powdery mildew. When the condition of wheat heading is appropriate, sheath blight may also occur, but it has generally entered the middle and later stages of disease. At this time, the effect of drug control is poor, and due to the dense growth of wheat in the field, it is difficult for the drug to spray on the base of wheat with frequent occurrence of sheath blight. It will also be affected.
The cyanomethoate mentioned in the text message should be a mixture of fenvalerate and dimethoate and should not be used to control wheat diseases. It should be used to control aphids and other pests. The pyrethroid pesticides such as fenvalerate and organophosphorus pesticides such as Dimethoate have a strong killing effect on natural enemies such as spiders. After the application of these medicines, field spiders, etc. are killed in large numbers, and pests such as locusts are re-emerged in large quantities without any natural enemies. Try to avoid using these medicines before and after wheat jointing. If necessary, it can be used during the wheat ear. The use of avermectin, pymetrozine and other drugs to control aphids, has good protection effects on spiders, and can use natural enemies to continuously control the occurrence of aphids and achieve better control effects.
The “metoprene†referred to in the text message should be a mixture of prochloraz and tebuconazole, temazoxamon. At present, there is no product with a content of 60% in domestic fenzomixamine products. It is recommended to check product information to avoid using counterfeit products.
Hexiconazole, tebuconazole, and cyanomethoate can be used in normal tank mixes. Due to different products and their additives, etc., should be observed when mixing, in the case of proper dispensing method, if the phenomenon of precipitation, oil emulsion layering, etc., can not be mixed.
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