How to control wheat scab?

What harm does wheat scab have? How to control wheat scab? Also ask netizens to help introduce the harm and control methods of wheat scab in the farming network, which are listed below for reference by the majority of netizens. The harm of wheat scab: wheat scab is a fungal disease, which mainly occurs on the wheat spike, causing the whole spike or part of the spikelet to rot. In rainy and wet weather, the diseased ear will produce pink mildew, and it is precisely because of this feature that it is named scab. Scab will cause withered and white spikes of wheat, reduce 1000-grain weight, and affect yield. On the other hand, the toxin secreted by bacteria limits the edible value of wheat, and wheat with a diseased grain rate of more than 4% cannot be purchased. Therefore, scab does great harm to wheat. The cause of wheat scab: the pathogen of wheat scab can only infect some florets at flowering and filling stage, and then spread to the whole ear. What can really cause the disease is a transmission called ascospores, which are produced from the diseased remains left over from the previous year, including diseased wheat ears, rice stumps and corn stalks. Secondly, it is a typical climatic disease. Only in the wheat flowering filling period encountered overcast and rainy weather, and there are a large number of bacteria (ascospores) in the air, the disease may occur. Due to the existence of a large number of germs every year, the weather from heading to filling stage of wheat, especially the rainfall and the number of rainfall, determine the severity of scab. Control methods of wheat scab: first, do a good job in pastoral hygiene, remove corn and wheat straw, especially in wheat-corn rotation fields, and ploughing and killing stubble must be done as soon as possible. Method 2. Strengthen prediction, spray protection during wheat heading and flowering stage, mix tebuconazole and prochloraz with carbendazim or use it alternately. Pharmaceutical formula: 50% prochloraz manganese salt, 50% imipramine manganese complex (also known as Shibao Gong) 1000mur2000 times, 25% tebuconazole (also known as Likexiu) EC 2500 times. It is generally mastered to spray when the heading rate of wheat reaches 10%. If rain is predicted, you can apply medicine before the rain. As it often rains during the heading and flowering stage of wheat in the south, it should be controlled on a sunny day. According to the local wheat heading neatness and weather conditions, some places should be controlled twice in a row at an interval of 7 days. Click to get more wheat planting technology click to get more grain planting technology