What is the condition of broadband bleaching in the leaves of corn seedlings?

Two weeks after the emergence of corn, there will be pale stripes on the leaves, and there will be wide-band albino spots on both sides of the midrib of the leaves, indicating that the corn is deficient in zinc, and we must pay attention to timely prevention and control, otherwise it will cause a serious reduction in yield.

Zinc deficiency symptoms in corn seedlings, zinc deficiency can lead to stunted fruit development, which affects yield, delayed ripening, and solving this disease requires us to improve the pH of the soil.

If there is a wide albino spot on both sides of the leaf midrib (i.e., the long tendon in the middle), while the midrib and the edge of the leaf are still green, this is a sign of zinc deficiency in corn.

White maize seedlings are caused by zinc deficiency. Generally from the 4-leaf stage, the leaf color at the base of the new leaf becomes pale and yellowish-white. At the 5 6 leaf stage, 1 3 leaves under the heart leaf appear light yellow and light green stripes, but the leaf veins are still green, and purple stripes appear at the base, after 10 15 days, the purple gradually turns yellowish-white, and the mesophyll becomes thin, showing "white seedlings".

In severe cases, the whole field is white. Zinc-deficient corn plants are short, with short internodes, overlapping leaf pillows, stunted growth of heart leaves, which look flat-topped, and in severe cases, white leaves gradually dry up, or even die of the whole plant. The main reasons for the whitening of corn seedlings are zinc deficiency and herbicide damage.

Genetic albino vaccine: A genetic mutation causes a lack of chlorophyll to live independently, and soon to die. Albino:

Individual varieties have poor herbicide resistance, excessive herbicide dosage, or wrong medication, and are easily affected by low temperature, resulting in the formation of chlorophyll at the corn seedling stage and the appearance of white seedlings. Zinc deficiency whitening: caused by zinc deficiency in the soil, symptoms generally begin to appear at the 4-leaf stage of corn, the leaf color at the base of the heart leaf becomes lighter, and it gradually loses green when it grows to 5 leaves, and it is yellowish-white on both sides of the main leaf vein.

White seedlings often occur during the seedling stage of maize, which is usually caused by zinc deficiency. The whitish appearance of corn seedlings is generally caused by zinc deficiency.

<> the leaves of corn are only whitish from the middle, and it is possible that they are suffering from bacterial leaf spot, dwarfing, hereditary streak disease and other diseases. Control methods (bacterial leaf souhong spot disease): strengthen field management after sowing, remove diseased plants and control pests in time; After the rain finger leaks, it should be drained in time to reduce the humidity in the field; At the beginning of the disease, 5% bacterial toxin clear wettable powder (500 times liquid) and 80% mancozeb wettable powder (800 times liquid) were used for spraying.

The whitish leaves of corn may be mosaic disease of white corn seedlings. Prevention and control methods: 1. When applying base fertilizer, apply cubic meters of high-quality organic fertilizer per mu, and mix and apply 1-2kg of zinc sulfate.

2. If zinc sulfate is not applied to the base fertilizer, zinc sulfate should be applied in the rhizosphere zone at the corn seedling stage. 3. Before sowing, use zinc sulfate solution to soak seeds for 6-8 hours, remove and dry before sowing.

1. What is the disease of white corn leaves?

The whitish leaves of corn may be mosaic disease of white corn seedlings. The prevention and control methods are as follows:

1. When applying basal fertilizer, organic fertilizer is the main fertilizer (it needs to be fully decomposed), supplemented by chemical fertilizer, and cubic meters of high-quality organic fertilizer are applied per mu, and 1-2kg of zinc sulfate is mixed and applied. If it is a mild zinc deficiency plot, apply zinc fertilizer again every 1-2 years. In the case of moderate or severe zinc deficiency plots, zinc fertilizer should be applied every 1 year, or the amount of zinc fertilizer should be reduced again in the following year.

2. If zinc fertilizer is not applied when applying basal fertilizer, zinc sulfate and fine soil can also be mixed evenly with zinc sulfate and fine soil per mu at the corn seedling stage, and then applied to the corn rhizosphere area.

3. Prepare 2-6g of zinc sulfate, dissolve it with a small amount of water, and then spray it on 1kg of uncoated corn seeds, mix and stir evenly, dry and sow seeds. Or use zinc sulfate solution to soak the seeds for 6-8 hours, remove them and dry them for sowing.

4. When it is found that the corn has white seedlings, spray 35-60kg of zinc sulfate solution per mu in the evening, and spray it once every 15 days or so, a total of 2-3 times.

2. What causes the whitish corn leaves?

1. Reasons. The whitish leaves of corn are due to a lack of zinc in the soil (the amount of zinc in the soil is low.

2. Main symptoms.

1) At the 4th leaf stage, the leaf color at the base of the new leaf turns yellowish-white. At the 5-6 leaf stage, the 1-3 leaves under the heart leaf appear pale green and pale yellow stripes, and the base appears purple streaks, while the veins are still green. After 10-15 days, the purple color slowly turns yellowish-white, and the mesophyll gradually becomes thinner, like a white seedling.

2) The corn plant is short, the internodes are short, the leaf pillows overlap each other, the growth rate of the heart leaves is slow, and the white leaves gradually dry up in severe cases, and then the whole plant dies. After jointing, it gradually turns pale green, and at the flare stage, the middle and lower parts of the leaf tend to appear yellow and green stripes along the leaf veins, and the base turns white again, and the leaf surface is translucent.

3) After tasseling, from the bottom to the top, it is in the shape of "flowers and leaves", and the tasseling and silking are about 2-4 days later than the normal plant.

<> corn leaves turn white may be caused by soil zinc deficiency, mostly in the 4-leaf stage and later, the leaves will fade green and then gradually yellowish-white state is delicate, anti-sail key treatment can be used as zinc fertilizer seed fertilizer and fine soil mixed evenly, sprinkled on the seed side of the corn when sowing, you can also spray a concentration of zinc sulfate solution 40-50 kg + new high fat film 800 times per mu, spray 1 time every 10-15 days, spray 2-3 times.

1. Spot disease: gray-green in the early stage, oval.

2. Small spot disease is water-stained at first, and the small spot gradually turns yellow-brown or reddish-brown.

3. Gray spot disease is light brown dots at the beginning, gradually expands to light brown stripes, and the lesions heal and die.

4. Leaf spot: small spots of primary greening, gradually expanding into round to oval greenish transparent spots, withered white to yellowish brown in the middle, dark brown on the edges.

Let's take a look and find some prevention and control methods.