How to remedy pepper frost damage?

The temperature is lower in winter, and farmers who grow peppers will find that they are easily threatened by frost damage, which reduces the yield and quality of peppers. So how to remedy the damage of peppers after frost damage? Let’s take a look with the editor below.

1. Let out the wind early

Let in air early to slowly raise the temperature. After the sun comes out, the temperature in the shed will rise sharply, accelerating the loss of moisture in the peppers. At this time, the shed should be ventilated early. For example, if the original temperature was 28℃, it can be raised to 25℃ in advance to slowly increase the temperature in the shed, allowing the frozen tissue to gradually absorb the moisture lost due to freezing. As the temperature rises, open the vents moderately, and then gradually reduce and close the vents after a while.

2. Rehydrate in time

Watering is required the next day after frost damage occurs. The best way is to spray clean water on the leaves. You can also use a dropper to water the plants. The amount of water should be 30%-40% of the usual amount. At this time, it should be noted that if the water source is well water, watering can be done in the morning. If it is river water, because the water temperature is too cold, you should water it at 2-3 pm when the river water temperature is closest to the ground temperature.

3. Reasonable topdressing

Reasonable application of quick-acting fertilizer to frozen peppers can not only improve the nutritional status of crops, but also enhance the plants' ability to withstand cold and frost, and promote the plants' recovery growth. Foliar spraying uses less fertilizer and has a faster effect than soil topdressing. After the temperature rises, spray peppers with amino acid foliar fertilizer + potassium dihydrogen phosphate + brown sugar. Foliar fertilizer should be sprayed evenly so that both sides of the leaves are covered with fertilizer liquid. 7-10 days after spraying, spray again.

4. Spray fungicide

After being frozen, the resistance of peppers decreases, and the frozen dead leaves are prone to mold and disease. Broad-spectrum pesticides such as thiophanate-methyl, carbendazim, mancozeb , methyl thiophanate, and pyraclostrobin can be selected.

5. Ventilate to reduce humidity

After watering due to frost damage, the humidity in the greenhouse will increase. In addition, the temperature in the greenhouse will be high under strong sunlight conditions, and diseases such as pepper blight will occur more frequently under high temperature and high humidity environments. Under the premise of keeping warm, appropriate ventilation should be provided to reduce the humidity in the shed.

6. Prune or replace frostbitten branches and leaves

The principle is not to prune the frostbitten branches of peppers before they dry up, so as to avoid new wounds that accelerate water loss. If the part above the cotyledons of the frostbitten plant is green, you can keep it so that new seedlings can grow. If the area below the cotyledons turns black, replace the seedlings with new ones in time. If you are not sure, you can plant new seedlings next to the frostbitten seedlings, and later choose to keep the frostbitten seedlings or plant new seedlings.

That’s it