Wheat: Powdery mildew, protective leaf
Q: I am a large farmer in Zhenjiang. What disease does my family have in wheat? What kind of pesticides are effective in prevention and control? In this case, can pesticides effectively prevent and treat diseases? In the picture sent by MMS, wheat powdery mildew has developed and the condition is serious. The diseased leaf rate and disease index are very high. The disease has spread to the wheat flag leaves. Without control, wheat leaves will quickly die due to the hazard of powdery mildew. Spikes can also be harmed, eventually causing serious grouting in wheat, resulting in a significant reduction in yield and quality. If the disease is common in the field, it should be used to prevent and control raindrops as soon as possible, and it can be used in conjunction with control of scab. In the absence of other azole bactericides in the short term, 10 grams of epoxiconazole or tebuconazole can be considered for each acre, and 20-30 grams of acetophenone can be used to prevent powdery mildew, plus carbendazim. 30-50 grams combined with prevention of head blight, plus enough water sprayed with a good atomization effect of medicinal machinery, spraying the upper and lower parts of the wheat plant as much as possible. According to the above scheme, the application cost is relatively high. If the occurrence of powdery mildew in the field is not uniform, it may be appropriate to spray more medicine and spray through the drug in the area where the disease is severe, and reduce the amount of pesticides in the lightly affected areas to reduce the incidence of disease. Mu dose, reduce the cost of prevention and treatment. Tip: Wheat mildew disease spreads quickly when the temperature is appropriate and humidity is high. The recent rainy weather in our province is particularly beneficial to the occurrence and spread of wheat powdery mildew. The reporter learned in Taizhou and other places on April 24 that in some local plots, wheat powdery mildew quickly spread to the upper functional leaves in a few days, a large proportion of flag leaves have also been infected, and some wheat flours The disease was particularly heavy. Almost all the wheat leaves had strong white powder, and wheat was just beginning to bloom. The production and quality of wheat in these lots will be greatly reduced. For this type of plot, early application of high-potency drugs, according to the condition of the appropriate increase in the amount of medication, powdery mildew control as soon as possible, otherwise the disease may quickly spread to the whole wheat within a few days, resulting in significant reduction in yield. BASF's European company's Zunbao 23% bacteriocyclone suspended fungus (Jiangsu region purchase contact phone), containing 11.5% of each of the ether and epoxiconazole, a large area in the past two years for the prevention and treatment of wheat powdery mildew effect is good Generally, 40 ml per mu is used. When the disease is heavy, the dosage may be increased or the frequency of application may be increased. Before and after wheat is applied at the full heading stage, it is also effective for control of wheat scab. Taking into account the recent weather conditions are very conducive to the occurrence of wheat powdery mildew, the incidence of heavier fields, it is recommended by a substantial increase in the amount of medication to control disease as soon as possible, in order to help improve disease control and production results.
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