At present, wheat in many places has been in the heading and flowering stage, which is the critical period for the onset of scab, so we should remind everyone to do a good job in the prevention of scab, otherwise the yield will be more serious. Especially this year, we should pay attention to the prevention of scab, so when exactly will wheat scab be prevented? and how to prevent it? The following will share with you the detailed methods for your reference.
Why emphasize that we should pay attention to the prevention of scab this year, first, scab can be prevented but not cured, we must seize the critical period of prevention, it is really too late to wait until the emergence of scab and then prevent and control, and second, according to the forecast of relevant departments, this year Hebei, Shandong, Jiangsu, Zhejiang and other parts of the region (this year) scab may be more severe, the third is this year's meteorological conditions are conducive to the occurrence of scab, the first two days ushered in a rainfall, itself this year's wheat growth is generally denser, so that the field humidity will increase significantly, which undoubtedly provides a good breeding ground for scab, so the prevention of scab is urgent, especially this year to pay attention to.
As for how to choose the drug, it is recommended to choose tebuconazole, prochlorazole, benzoconazole, azole ether fluconazole, etc., all of which are OK. Because many areas are currently in the critical period of wheat spraying and three prevention, we can bring insecticidal clothianidin or homochlorothiamethoxam together, plus potassium dihydrogen phosphate and regulators (the regulator can choose brassinin or benzyl triaconol) These agents can be sprayed together to not only treat diseases and insects, but also prevent dry and hot air, which can save time and effort.
When it comes to the last spray of wheat, I want to say a few words here, because the wheat growth period is different, so the time of spraying is also different, we can choose according to the wheat in different growth periods. First of all, it is just in the booting stage, and in this case, it should wait about ten days before spraying. The second is the belly breaking stage, that is, when the ears of wheat have just emerged, which can be sprayed after two or three days. This is followed by wheat that has been headed but has not yet flowered, in which case it can be sprayed now. Finally, there is complete heading accompanied by sporadic flowering, in which case it should be sprayed immediately and do not wait any longer to avoid missing the opportunity (provided that the weather is good)
Finally, the prevention of wheat scab is generally possible from the full ear of wheat to the early stage of flowering, and it is better to do it sooner rather than later. Because the wheat is pumped to the early stage of flowering is also the best period for the first time, if the scab in the plot is more serious in previous years, it can be beaten twice, and then beaten again after 5~7 days after the first time. In addition, if it rains within three hours after spraying, it should be made up in time after the next day.
Some people may say that they will take medicine at this time for a while, and they will be sprayed at that time for a while, and they really don't know when the effect of disease prevention and insect treatment is good. On this issue, I suggest that you should focus on the period from the beginning of wheat heading to the early stage of flowering, because this is also the critical period for the prevention and control of wheat sucking insects and scab, after this time period, sucking insects and scab can not be prevented, and aphids and powdery mildew can be played at any time, so the prevention and treatment of diseases and insects should focus on the key points and grasp the key time nodes, which is the heading to the early stage of flowering, which can not only prevent sucking insects and scab, but also prevent aphids and powdery mildew. In addition, if you want to prevent dry and hot air, you can add 100 grams of potassium dihydrogen phosphate per mu.
To sum up, wheat scab can be prevented and incurable, we must seize the prevention period and use the right method, so as to reduce the occurrence of scab, especially this year, we should pay more attention to the occurrence of scab, the above is the scab prevention period and the selection of methods and agents, I hope it can help you.
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