Pepper Disease Control Methods and Key Points for Identifying Common Diseases

During their growth, peppers are susceptible to a variety of diseases, the common ones being damping-off, seedling blight, Phytophthora blight, anthracnose, viral diseases, bacterial spot, and powdery mildew. These diseases mostly occur in plots with high temperature and high humidity, continuous cropping, or rough management. In mild cases they affect plant growth and fruit quality; in severe cases they cause plant death and reduced yield. Therefore, scientific disease control is an important guarantee for stable and bumper pepper harvests.

Agricultural control is the foundation of disease prevention. When planting, choose varieties with relatively good disease resistance, and before sowing, sun the seeds, treat them with warm water soaking, or disinfect them with chemicals; avoid continuous cropping with Solanaceous crops such as tomato and eggplant, as proper crop rotation can significantly reduce the buildup of soil-borne pathogens. When transplanting, pay attention to reasonable planting density, maintain ventilation and light penetration between rows, and promptly clear ditches and drain water after rain to lower field humidity.

Water and fertilizer management and field sanitation are equally critical. Excessive application of nitrogen fertilizer tends to cause spindly, overgrown plants and reduced disease resistance, so increase the application of fully decomposed organic fertilizer and phosphorus and potassium fertilizers to strengthen the plants' disease resistance; watering should preferably be done on sunny mornings, avoiding flood irrigation. During the growing period, inspect frequently, promptly remove diseased leaves and fruits, and for severely diseased plants, pull them up by the roots and carry them out of the field for disposal to prevent the pathogens from spreading to surrounding plants.

Chemical control should be targeted and emphasize prevention over cure. For fungal diseases, appropriate fungicides can be selected for spraying or root drenching in the early stages of the disease; the key to viral disease control lies in promptly controlling aphids and other virus-transmitting vectors and cultivating strong seedlings; for bacterial diseases, chemicals effective against bacteria should be selected. When spraying, rotate chemicals with different active ingredients to delay the development of resistance, and strictly observe the pre-harvest interval, stopping application in good time before harvest to ensure the food safety of pepper products.