It is understood that from the emergence of corn to tasselling, there may be distorted leaves at different leaf ages, leading to distortion of the heart and leaves of corn due to the following two main reasons:
Inadequate use of herbicides is caused by high temperature conditions, excessive doses, or repeated spraying. The second is that pre-emergence herbicides (such as acetochlor and metolachlor and other amide herbicides) will cause young leaves to shrink and twist, can not fully expand, form D-type seedlings, plant dwarfing, development deformity; post-emergence weeding If the agent is more than 5 leaves in the corn, the liquid can not be sprayed into the heart, such as the accumulation of liquid in the heart leaves, will cause distortion, leaves turn white or rotten heart, the plants will dwarf. Third, the herbicides applied too late, corn will produce onion tube leaves of the phytotoxicity, mainly some of the hybrid varieties are sensitive to the drug, this symptom occurs, resulting in young ears can not be properly extracted.
Control methods:
1. Try to avoid high temperature medications as much as possible.
2. When the injury phenomenon is light, it is timely to top-dressing and watering, which can relieve the injury of the medicine. When the injury is serious, it can be manually assisted in picking up the leaves or foliar to spray the plant nutrient containing potassium nitrate, zinc sulfate, etc. to ease Phytotoxicity.
3. The appropriate period of time to prevent the use of drugs to cause drug damage too late.
Maize Thrips Damaged Maize is often victimized by thrips in the 3-5 leaf stage. The victim's heart is distorted, leaves are broken, shrunk, and rows of holes appear on the leaves. There is a transparent film on the front of the leaf, some of the heart has mucus, and some of the heart has broken off and a large number of thrips are visible.
Control methods:
1.10% imidacloprid 1000 times or 5% acetamiprid 1500 times, plus some efficient foliar fertilizer, spray 5 to 7 days intervals, and even spray 2 times. Focus on the heart leaves and the leaves on the back.
2. Severely deformed plants should be manually dissected to twist the heart.
Inadequate use of herbicides is caused by high temperature conditions, excessive doses, or repeated spraying. The second is that pre-emergence herbicides (such as acetochlor and metolachlor and other amide herbicides) will cause young leaves to shrink and twist, can not fully expand, form D-type seedlings, plant dwarfing, development deformity; post-emergence weeding If the agent is more than 5 leaves in the corn, the liquid can not be sprayed into the heart, such as the accumulation of liquid in the heart leaves, will cause distortion, leaves turn white or rotten heart, the plants will dwarf. Third, the herbicides applied too late, corn will produce onion tube leaves of the phytotoxicity, mainly some of the hybrid varieties are sensitive to the drug, this symptom occurs, resulting in young ears can not be properly extracted.
Control methods:
1. Try to avoid high temperature medications as much as possible.
2. When the injury phenomenon is light, it is timely to top-dressing and watering, which can relieve the injury of the medicine. When the injury is serious, it can be manually assisted in picking up the leaves or foliar to spray the plant nutrient containing potassium nitrate, zinc sulfate, etc. to ease Phytotoxicity.
3. The appropriate period of time to prevent the use of drugs to cause drug damage too late.
Maize Thrips Damaged Maize is often victimized by thrips in the 3-5 leaf stage. The victim's heart is distorted, leaves are broken, shrunk, and rows of holes appear on the leaves. There is a transparent film on the front of the leaf, some of the heart has mucus, and some of the heart has broken off and a large number of thrips are visible.
Control methods:
1.10% imidacloprid 1000 times or 5% acetamiprid 1500 times, plus some efficient foliar fertilizer, spray 5 to 7 days intervals, and even spray 2 times. Focus on the heart leaves and the leaves on the back.
2. Severely deformed plants should be manually dissected to twist the heart.
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