Causes and Control methods of discoloration of Maize seedlings

Corn is the most common crop in rural areas of our country, and the more it is the main source of income for many farmers, the leaves and stems of corn remain green and dark after suffering from diseases and insect pests and death. However, when many farmers are planting, they find that the corn seedlings are abnormal in color, such as the leaves turning yellow, white and purple. What's going on at this time? come to the pro-agricultural network to see the detailed introduction.

1. Leaf seedlings turn yellow

The leaves of the seedlings begin to turn green and turn yellow gradually, which is mainly because the growth of the seedlings is relatively weak, but it is strong. In addition, if the sowing is too deep and the planting density is high, the poor soil is also a factor leading to this phenomenon. If no measures are taken, all the leaves withered and fell off in the later stage, leaving only a bare rod.

Control methods: select seeds with full grains and large size, accelerate germination before planting, improve germination rate, reasonable close planting, strengthen management, weeding frequently, apply more nitrogen fertilizer, and promote its rapid and strong growth.

2. Leaf seedlings whitening

Leaf seedling whitening mainly occurs before and after the seedling grows 3-4 true leaves, when the leaves begin to appear yellow and white, with the growth of seedlings, new leaves grow, the yellow-white area expands continuously, and finally the whole leaf turns yellow-white except for leaf veins. The base will also appear purple, after ten and a half days, purple becomes white, the leaves are thin, showing the phenomenon of white seedlings from a distance, in fact, this is caused by the lack of zinc in the seedlings.

Prevention and control method: now that we know that the whitening of leaf seedlings is caused by zinc deficiency, we should prescribe the right medicine to apply zinc fertilizer, pay attention to the method of fertilization, stir the zinc fertilizer and fine soil evenly, and then sprinkle it next to the root system or seed. You can also spray the leaves with zinc fertilizer, or mix seeds with zinc fertilizer before planting.

3. The leaves and seedlings turn purple

Purple leaf seedlings generally occur after the growth of 2-3 true leaves, like the above two kinds, the seedlings begin to fade green, and gradually turn purple, especially the leaves are the most obvious, in addition, the growth is very slow. In fact, this is due to the deficiency of the phosphorus needed for seedling growth, and it is also easy to cause this phenomenon in low-lying areas.

Control methods: increase the application of phosphate fertilizer, as above, pay attention to the methods of fertilization, intensive cultivation, strengthen management, timely drainage after the rainy season, strengthen the prevention and control of diseases and insect pests.

The above are the causes and control methods of discoloration of maize seedlings brought by pro-agricultural networks. it can be seen from the above that the main cause of discoloration of maize seedlings is caused by the lack of certain substances, so it is necessary to apply sufficient base fertilizer when planting, reasonable collocation when fertilization, not single fertilization.