Control of Maize Red Leaf Disease
Symptom Huangzao four groups of improved varieties in the filling period in the event of low temperature, overcast and rain, the leaves turn red, which is called red leaf disease. The cause of the disease is related to the rapid filling of this variety, when a large number of synthetic sugars cannot be rapidly transformed into anthocyanins and green leaves turn red due to metabolic disorders. Prevention and control methods (1) serious occurrence areas, do not plant on sticky wetlands. (2) pay attention to prevent low temperature and increase the application of phosphorus and potassium fertilizer.
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Key points of Control techniques of Maize Gray Leaf spot
The gray leaf spot of maize can occur in the whole growth period, but the disease is the most serious in the heading and filling stage. The initial stage of the disease is water-stained light brown spots, these spots extend parallel to the leaf veins, often rectangular, more obvious to the light perspective, gray in the middle of the disease spot, with brown lines on the edge. The size of the lesion is 2 mi 4 × 10 mi 24 (mm).
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Control techniques of Maize smut
Corn smut is called "ash bag" by farmers. It can occur in all growth stages of maize, harming male and female ears, male and female, stems and leaves, etc. Symptom identification the symptoms were gradually obvious before and after the bolting of corn. The affected parts grow tumors of different sizes, which are white or reddish purple at first, then turn gray, and spread black powder after rupture. All right.
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