Symptoms of element deficiency in corn
Nitrogen deficiency: the lower leaf yellowed in the shape of "V", the leaf tip withered and lacked phosphorus: the plant was thin and small, the stem and leaf was purplish red, and the old leaf tip withered in severe cases. Deformed panicle, low seed setting rate, delayed potassium deficiency: yellowing of lower leaf tip, withering of old leaves, shortening of internodes, delayed boron deficiency: short spike axis, deformed ear, irregular grains and sparse calcium deficiency: leaf margin showed white markings and serrated transverse cracking, top leaf reel bent downward arched, connected leaves adhered to zinc deficiency: flower white seedlings, called mosaic stripe iron deficiency: leaf pulse chlorosis. Striped mosaic
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How to cultivate Maize
1. Land selection 1. Irrigated corn should choose plots with flat terrain, good structure, good air permeability and high soil fertility. 2. Film-mulched corn can choose dry flat land, mountain root land, horizontal terrace, Eryin land, mild saline-alkali wetland, alpine mandian, one water land, and do not choose steep slope.
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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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