What to Do About Pepper Plant Death? Detailed Explanation of Causes and Control Methods

Pepper plant death has always been a persistent worry for vegetable growers. It seriously affects pepper yields and causes growers huge losses, so if you want to grow peppers well, you must carry out proper control measures against this disease. So what causes pepper plant death? And how should it be controlled? Let's take a look together.

1. Bacterial wilt

Bacterial wilt is a devastating disease in pepper production. When it strikes, the leaves wilt at noon and recover by evening, until finally they wilt and cannot recover. In open-field cultivation, it very easily causes large-scale death after rain, and even after death the plants keep their original green color, with no obvious external symptoms. When the stem is cut open, milky white mucus can be seen flowing out, accompanied by a foul odor. It is a bacterial disease.

Control methods: Avoid continuous cropping with solanaceous crops such as tomato and eggplant; it is best to rotate with cruciferous crops. Use high-ridge cultivation with plastic film mulching, and be sure not to flood-irrigate. Drain promptly after rain, and be careful during hoeing and weeding not to damage the root system. Remove diseased plants promptly, disinfect the diseased planting holes well, and at the same time spray the branches thoroughly with Xinzhi mycin or copper quinoline.

2. Phytophthora blight

This is also a devastating disease. It can occur at the seedling stage and on mature plants. When seedlings are affected, water-soaked lesions appear at the base of the stem, gradually constrict, causing the seedlings to lodge and rot, and finally wither and die. When mature plants are affected, pale green lesions appear on the leaves and gradually expand. When humidity is high, white mold-like growth can be seen on the lesions, and finally the leaves become soft, rot and fall off. When the stem is affected, water-soaked lesions appear and gradually spread into irregular brown spots. After encircling the stem, they cause the cortex to rot, and finally cause the plant to collapse.

Control methods: Plant at a reasonable density, avoid flood irrigation, maintain good field sanitation, promptly clean up diseased and residual plants, carry them out of the field and burn them. When disease occurs, spraying metalaxyl mancozeb or Propamocarb gives good control results.

3. Root rot

Root rot generally occurs after transplanting. When it strikes, the top leaves of the plant wilt and recover in the evening or morning. After repeating several times like this, all the leaves wilt, but the color remains green. Brown lesions appear at the base of the stem and gradually rot, exposing the xylem. In humid environments, a white or pink mold layer grows, which is the pathogen's conidia.

Control methods: Manage field moisture well so that humid environments do not easily trigger this disease, especially draining promptly and loosening the soil after the rainy season. Remove diseased plants promptly and carry them out of the field, spread lime on the diseased planting holes to disinfect them, and spray pesticide thoroughly for control.

The above is an introduction to the causes and control methods of pepper plant death. We hope it can help you. To learn more related knowledge, please stay tuned to us.