What medicine works well to treat curled leaves on tomato plants

Curled leaves on tomato seedlings are a common disease in the tomato growing process, so what medicine should be used to treat curled leaves on tomato seedlings? Let's find out together!

For mild symptoms of tomato leaf curl, you can spray 5000 times diluted Bihu, or apply brassinolide (Yunda 120) to relieve it. However, there are many causes of leaf curl symptoms in tomatoes, and not all leaf curl requires pesticide application; it must be analyzed according to the specific situation.

1. Excessive fertilization causes leaf curl

Excessive fertilization can also cause tomato leaf curl. When fertilizing, attention should be paid to the reasonable combination of fertilizers, and a mixture of various microfertilizers and other fertilizers should be selected. How to fertilize is determined according to tomato yield, and the amount of fertilizer applied per flush should be determined by the current number of fruit clusters.

2. Strong exchange of cold and warm air in the greenhouse causes leaf curl

If ventilation in the greenhouse is too rapid and the exchange of cold and warm air inside and outside is strong, the tomato leaves near the vents will curl.

Heating wires can be added for warming, or stoves can be temporarily added to raise the temperature and promote growth. At the same time, spray about 7500 times diluted Bihu, and combine it with water spraying for 1 to 2 foliar fertilizer applications. When the leaves turn yellow, foliar fertilizer can be sprayed for conditioning.

3. Watering causes leaf curl

When growing tomatoes, if high temperature and drought occur and water cannot be replenished in time, the leaf area is large at this time, and high temperature and strong light strengthen leaf transpiration, the leaf stomata close, causing leaf curling.

Note that tomatoes should not be watered at noon during high temperatures. Tomatoes grow slowly when the temperature is above about 30°C, increasing photorespiration and affecting nutrient accumulation. With continuous high temperatures above 35°C, the plant leaves transpire faster, and it is easy to cause dehydration on the leaf surface and upward leaf curling.

4. Leaf curl caused by too high a concentration when using 2,4-D for flower dipping

When using 2,4-D for flower dipping during the flowering period, if the concentration is too high or it splashes on the leaves, the leaves become thicker, wrinkled, or curl downward.

Therefore, when using 2,4-D for flower dipping, the concentration must not be too high, and the amount used must not be too large. Be careful not to drip the solution onto the leaves, and it is not suitable for spraying. When using 2,4-D butyl ester for weeding, keep it as far away from the vegetable greenhouse area as possible, or apply it when the greenhouse is closed.