What medicine should be used to treat the rolled leaves of tomato seedlings?

Curling leaves of tomato seedlings is a common disease in the process of tomato planting, so what medicine should be used to treat the rolled leaves of tomato seedlings? Let's get to know it together.

Tomato leaves with mild symptoms can be sprayed with 5000 times solution or relieved by brassinolide (Yunda). However, there are many reasons for the symptoms of tomato leaf curling, not all rolled leaves need to be applied, it is necessary to analyze the specific situation.

1. Excessive fertilization leads to leaf curling

Excessive fertilization will also lead to leaf curling in tomatoes. Attention should be paid to the reasonable collocation of fertilizers and the mixed application of a variety of micro-fertilizers and other fertilizers should be selected. How to apply fertilizer is based on tomato yield, and the amount of irrigation should be determined by the current number of ears.

2. The strong exchange of cold and warm air in the shed leads to the rolling of leaves.

The ventilation in the shed is too urgent, and the exchange of cold and warm air between indoor and outdoor is strong, which will cause the tomato leaves near the vents to roll up.

Hot lines can be added to heat up or temporarily increase the temperature of the furnace to promote growth. At the same time, spraying about 7500 times of liquid green protection, combined with water spraying for 1 or 2 times of foliar fertilizer spraying. When the leaves turn yellow, foliar fertilizer can be sprayed for conditioning.

3. Watering leads to leaf curling

When planting tomatoes encountered high temperature and dry weather and could not replenish water in time, at this time, the leaf area was large, high temperature and strong light enhanced leaf transpiration, leaf stomata closed, resulting in leaf curling.

Be aware that tomatoes can't be watered at noon when the temperature is hot. Tomato grows slowly when the temperature is higher than 30 ℃, which increases photorespiration and affects nutrient accumulation. When the high temperature lasts for more than 35 ℃, the water transpiration of plant leaves is faster, which is easy to cause dehydration on the leaf surface and curl up the leaves.

4. The high concentration of dipping flowers with 2mai 4Mel D will lead to leaf curling.

When dipping flowers with 2pj4Mel D at flowering stage, the concentration is too high or sprinkled on the leaves, so that the leaves become thicker, wrinkle or curl down.

Therefore, the concentration of dipping flowers must not be too high, and the dosage should not be too large. Be careful not to drop the liquid on the leaves, and it should not be sprayed. When weeding with 2p4murD butyl ester, try to stay away from the vegetable greenhouse area as far as possible, or when the greenhouse is closed.