Causes and prevention measures of pepper leaves

Farmers who grow peppers know that during the planting of peppers, they often encounter the problem of falling leaves. If they are not controlled in time, they will cause the leaves of pepper plants to fall out, resulting in severe reductions in pepper production and even failure to harvest. So what is the cause of pepper leaves? How to prevent them? Let ’s take a look with Xiaobian.

Causes and prevention measures of pepper leaves

First, the reason for pepper leaves

1.Moisture

Pepper is a crop that is neither cold-resistant nor water-resistant. If continuous rainy weather is encountered during planting, the photosynthesis will deteriorate, and the respiration and transpiration will be weakened accordingly. State, coupled with the high moisture content in the soil, the root system is extremely prone to insufficient oxygen supply, leading to fallen leaves. If the lack of water, it will also cause damage to peppers, dehydration and wilting of leaves, disturbance of physiological metabolism, and peppers will be stunted.

2.Temperature

This is mainly caused by the sowing date, sowing is too early or in the wrong season, and the growth temperature is low or exceeds 35 ° C. Will cause fallen leaves or even fruit. If the continuous rainy days encountered in the hot season, the high temperature and humidity will accelerate the degree of fallen leaves.

3.Light

The acquisition of light is closely related to the planting density. If the planting density is too large and the plants have too many branches, they will compete for nutrients, and they will be airtight and light-tight, and the lower leaves will fall because of insufficient light.

4. Pest and harm

Common diseases currently causing pepper leaves include necrotic virus disease and powdery mildew. The humidity is high, the temperature is high, and the disease is most likely to occur due to poor ventilation. The former will cause large area necrosis of the leaves along the veins, and thus leave leaves. The latter will form a layer of white powder on the back of the leaf, and brown or yellow spots on the surface, which will lead to severe fallen leaves.

Causes and prevention measures of pepper leaves

Control measures for pepper leaves

1. Reasonable watering, small watering, not flooding. It is better to choose morning and evening watering. In overcast and rainy days, drain the accumulated water on the flooded land in time, and reduce the damage to the high groundwater level. Cultivation in ridges; watering in time to increase soil moisture during drought to ensure normal pepper growth

2. If the fallen leaves and fruits are caused by temperature, field management can be strengthened, and measures such as cultivating weeds, loosening soil, shading, and watering can be adopted.

3. Adjust density in time to remove young plants. Remove the lower old leaves or carry out appropriate pruning to facilitate ventilation and light transmission, but also to control the amount of nitrogen fertilizer used to prevent the excessive growth of peppers. Spray 0.3% to 0.4% potassium dihydrogen phosphate solution on the leaves. Ensure a balanced nutrition supply, and promote no premature senescence and growth of pepper plants.

4. Disease is the main reason for the leaves of pepper seedlings, so the disinfection of seeds before sowing cannot be ignored.

5. In addition, spray the pesticide twice before planting to prevent the occurrence of gray leaf spot. During the budding period (late May to early July), pesticides are sprayed every 6 days or so. After a period of time, the disease will be basically prevented. Once the disease occurs, in the early stage of the disease, spray fungicides to prevent and cure. Before the onset, it can be prevented with 1: 1 Bordeaux solution. In the early stages of the disease, 70% methyltobzine wettable powder 800-1000 times liquid, 50% carbendazim wettable powder 800 times liquid can be selected. Spray once every 7 ~ 10d, and spray twice or three times.

6. After picking the peppers, timely clean up the diseased plant residues, burn them centrally, and reduce the source of the disease.

Causes and prevention measures of pepper leaves

The above are the causes and control measures of pepper leaves. Pepper leaves are a common phenomenon in the cultivation of peppers. Of course, the causes of pepper leaves are not only the above, but they have a greater relationship with the management of farmers. Therefore, when planting peppers, farmers must strengthen management to prevent pepper leaves from falling in time to avoid unnecessary losses caused by pepper leaves.

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