Causes of Abnormal Leaf Drop in Peppers and How to Prevent and Treat It
During the cultivation of peppers, leaf drop often occurs in the late growth stage, which is relatively normal. However, if leaf drop occurs in the early to mid growth stages, and especially if it is heavy leaf drop, then you need to be cautious. So what causes abnormal leaf drop in peppers during the early to mid stages? Follow along with the editor to learn more.
I. Causes of Abnormal Leaf Drop
1. Drought and waterlogging
During cultivation, water has a relatively large effect on peppers. If the field is waterlogged or drought-stressed for a long time and irrigation is not carried out promptly, the plants will become severely short of water, the leaves will wilt and dry up, and in severe cases a large number of leaves will drop. In addition, if it rains for a long time and good drainage measures are not taken, water will accumulate in the field, which can also cause leaf drop.
2. Insufficient nutrients
During pepper cultivation, nutrients are extremely important. If fertilizer is applied insufficiently and nutrients cannot keep up, the leaves will also drop due to a lack of nutrients.
3. Temperature
Peppers are relatively sensitive to temperature. Temperatures that are too high or too low are both unsuitable for pepper growth. Generally, peppers can grow normally between 15-35, but if they are exposed to temperatures below 15 degrees or above 35 degrees for a long time, peppers will show heavy leaf drop.
4. Density
During pepper cultivation, if planting is too dense, then in the mid to late stages the ventilation and light penetration conditions will be poor, which will seriously affect photosynthesis and respiration in peppers and cause heavy leaf drop.
5. Diseases
Diseases are the main cause of leaf drop in peppers, such as viral disease, anthracnose, and gray leaf spot. If diseases are not controlled in time after they occur, they will not only cause leaf drop but also affect yield.
II. Prevention and Control Measures
1. Choose disease-resistant varieties
There are many pepper varieties. When buying seeds, you should choose varieties that are suitable for local cultivation and have strong disease resistance. In addition, seed soaking treatment is also needed before sowing.
2. Reasonable dense planting
When planting, cultivation measures such as deep furrows and high beds can be used. This can not only ensure ventilation and light penetration conditions, but also effectively prevent waterlogging damage.
3. Crop rotation
If leaf drop occurs relatively severely, rotation can be carried out with non-solanaceous crops, and the rotation interval should preferably be 2-3 years. At the same time, after the pepper harvest, remember to clean up diseased plant residues.
4. Fertilizer and water management
For fertilizer management, pay attention to the use of base fertilizer and topdressing. Broadcasting organic fertilizer before sowing is better, and do not apply only nitrogen, phosphorus, and potassium fertilizers. In addition, medium and trace element foliar sprays can also be used. Irrigate and water promptly during drought, and if there are continuous rainy days, drain water and reduce humidity promptly.
5. Disease control
For diseases, prevention should be taken as the main principle. When symptoms appear in the field, spray pesticides promptly for control. Agents such as chlorothalonil and thiophanate-methyl can be used, and then choose the appropriate agent according to the disease. Depending on the control situation, spraying can be repeated multiple times at intervals of 7-10 days.
The above is an introduction to the causes of abnormal leaf drop in peppers and the prevention and control methods. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.