Pepper leukoplakia is a disease caused by fungi. It mainly damages the leaves and affects the growth of peppers. So, how to control pepper white spot? This article gives a detailed introduction of the symptoms, incidence characteristics and control methods of pepper leukoplakia. The specific content is as follows:
Chili pepper white spot symptoms
Pepper leukoplakia mainly damages the leaves, with 1 to 2 mm brown spots at the beginning, brownish at the back edge, grayish at the center, and slightly concave, especially on the tender leaves. The lesions spread slowly, gradually forming rouleau, and high humidity. When the lesions fuse into irregular spots, the diseased leaves yellow or fall off. The stem is infected and forms a long spot of 5 to 10 mm. Other spots can also produce brown spots that are not reshaped. Petals and fruits are generally not affected.
White pepper spot disease characteristics
Pepper leukoplakia was a fungal disease, and the pathogen was StemphyHu lycopersic. The pathogenic bacteria may overwinter in the soil or the diseased seed, when the temperature and humidity are suitable, the human invades to form the initial infection, and the pathogenic bacteria produced in the diseased part is reinfected through the spread of wind and rain. Warm and humid days, cloudy days and long duration of condensation are important conditions for the onset of illness. Soil fertility is insufficient, plant growth is weak, and the disease is heavy.
White pepper spot control
(1) Cultivation measures. Select resistant varieties; increase organic fertilizer and phosphorus. Potash fertilizer; The diseased bodies are promptly removed after harvest and burned in a concentrated manner.
(2) Chemical control. At the beginning of onset of spraying, commonly used pesticides are 75% chlorothalonil wettable powder 600 times, 77% can kill wettable powder 400-500 times, 80% new Wansheng WP 800 times, 50% kill Sulphur suspension 500 times. Spray once every 10 days or so, continuous control 2 or 3 times.
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