Distortion of corn leaves is a common phenomenon in planting corn, especially in the rice seedling stage and the tasseling stage. Why is there a leaf twist in the corn? When the corn is twisted, the farmers are worried about whether it will affect the growth and development of the corn. Will it affect production and so on. Let's take a look at the causes of corn distortion and its prevention measures. First, Hummer caused The hazards of thrips mainly occur in the seedling stage, especially in summer. When the corn seedlings are twisted, when we unfold the twisted leaves, we will find that the base of the heart leaves shrinks and some breaks. Then we will find a small bug inside the thrips. The main reason is that the thrips secrete a kind of mucus, which causes the heart leaf to not bond properly and twists into a "bull tail" shape. Precautionary measures: Predict and predict the density of the worms, and spray the imidacloprid or acetamiprid solution with streptomycin in agriculture. The concentration and method of use shall be subject to the instructions of the drug. Spray again at intervals of 5 to 7 days, even spray 2 Times. Second, herbicide phytotoxicity (1) Nicosulfuron phytotoxicity: After using nicosulfuron-methyl seedling herbicide, spraying at high temperature, or repeated spraying, will cause the plant to dwarf, the leaves are yellow, the growth is weak, the heart leaves are twisted, the leaves Can not be unfolded, and often accompanied by tillering, the phytotoxic plants are shorter than normal plants. Some varieties are more sensitive to pharmacy. If sprayed too late, the leaves will be twisted into whip. When severe, tassels cannot be extracted normally. (2) 2,4-D butyl ester phytotoxicity: The use of 2,4-D butyl ester is more stringent, and a slight inadvertent will lead to phytotoxicity. 1 Requirements for soil: 2,4-D butyl ester has a small range of movement in relatively heavy soil, but it will concentrate in the depth of 4-5 cm of plough layer in sandy loam or sand, especially after heavy rain, resulting in phytotoxicity. 2 spraying time requirements: spraying before seedlings should be carried out at least 3 days before emergence, and phytotoxicity will occur in the evening; after spraying, it should be used after 2 leaves, generally used in 4-5 leaf stage, which will lead to premature The phytotoxicity occurs and the leaves are twisted. In addition, too high a concentration of the drug solution or repeated spraying may also cause phytotoxicity. (3) Preventive measures: 1 Select the breeze or no windy weather spray, select the appropriate spray head and must lower the spray to prevent the liquid medicine from drifting to form phytotoxicity to the crops. 2 When purchasing herbicides, be sure to read the product instructions carefully, or ask the pharmacist to dispense the pharmaceutical liquid in strict accordance with the instructions for use of the drug. Use reverse spray and spray evenly, and should not be reused. 3 Spray should be timely, not too early or too late. (4) Mitigation measures after phytotoxicity: 1 light can be timely irrigation to relieve the concentration of liquid. The two heavy ones immediately cut off the upper 1/4 twisted blade with scissors, and the artificially twisted heart can be used and watered. 3 Spraying foliar fertilizer such as brassinolide to alleviate the phytotoxicity. Third, the climate caused Some varieties are sensitive to climate change, and dry and wet alternates due to drought and rainfall; alternating hot and cold due to high temperatures and relatively low temperatures can cause the leaves to curl. However, this kind of curl usually occurs between the corn trumpet period and the time before the tasseling. This kind of curl caused by climate change will naturally develop within one week without affecting flowering pollination, so don't worry. Fourth, the corn variety itself Some varieties will also have short-term leaf distortion due to their own original conditions. This situation will naturally develop, will not affect normal growth and development, and will not affect normal flowering pollination, so do not worry. As can be seen from the above, the reasons for corn leaf distortion are many and complicated, so if the corn leaves are found to be distorted, it is necessary to carefully analyze what causes it, take targeted measures, and strengthen field management. Under normal circumstances, the distortion of the blade will not cause a reduction in production. However, if the blade is curled into a whip, the corn itself will not be self-adjusting. Therefore, manual measures should be taken to assist the deployment. Otherwise, the corn flowering powder will be affected, which will affect the fruiting and reduce the yield. ZHOUSHAN SINOMEGA BIOTECH ENGINEERING CO.,LTD , https://www.sinomegabiotech.com
