Control corn "white mosaic disease"
After corn emerges, white seedlings often appear. When a leaf emerges, the base of the leaf begins to whitish green, forming yellowish-white stripes, gradually expanding to the leaf margin and tip; when 5 to 6 leaves, Between 1 and 3 leaves below the heart, yellowish and light green stripes appear. The veins are still green, purple stripes appear at the base, and they gradually turn yellowish-white. The leaves are thin and transparent. In severe cases, white leaves gradually dry and even the whole plant dies. This is the "white mosaic disease" of corn. After the onset of the disease, the growth and development of the corn is not only slow, the plants are short, and there are many empty rods. The ear lacks grain baldness and seriously affects the yield.
The occurrence of corn "white mosaic disease" is mainly caused by soil zinc deficiency. Maize is very sensitive to zinc and zinc deficiency can occur if the effective zinc content in the soil is lower than the critical plant (1.5 parts per million). Most of the zinc-deficient soils are calcareous soils or saline-alkali soils. In addition, in the soils with excessive superphosphate, the zinc phosphates are easily synthesized due to zinc and phosphorylation, and zinc deficiency is also likely to occur. Therefore, in planting corn on zinc-deficient soil, it is necessary to adopt fertilizer measures to supplement zinc.
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