1. Pepper bacterial wilt. Symptoms: The diseased leaves wilted at noon and returned to normal in the early evening. After 2 or 3 days, the plants gradually died, but the leaves remained green, but the color was light and dull, so it was called bacterial wilt. The stems of the diseased stems were seen to be brown, and white mucus exuded from the cross-section of the hand. This was the culprit of the pus. Control measures: 1 Crop rotation with grass crops. 2 plant disease resistant varieties. 3 improve the soil. For acidic soils, 60-80 kg of lime should be applied per 667 m2 in conjunction with soil preparation to disinfect the soil and make the soil alkaline. 4 When the diseased plant emerges, it should be promptly removed and appropriate amount of lime should be thrown around the diseased area to prevent the spread of the disease. 5 At the beginning of the disease, streptomycin sulfate with a concentration of 200mg/kg or 800ml with 20% Yeqingshuang was used to perfuse about 250ml per plant. Sprinkle once every 7 days. 2. Chick virus disease. Symptoms: The diseased plants showed four types of mosaic, yellowing, necrosis, and malformation. Occurrence of mosaic type, diseased plant leaves faded green, resulting in yellow-green mottled or tan ring spots, young leaves become narrower and smaller, leaf margins are rolled up, veins are shrinking and deformed, and the foliage is uneven. The diseased plants were significantly shorter than the healthy strains, and the veins of a few diseased plants were brown or black necrotic. Control measures: 1 Soak seeds with 10% trisodium phosphate for 20-30 minutes prior to sowing for seed disinfection. 2 Minimize agricultural operations to avoid human transmission. 3 The disease is mainly transmitted by locusts and mites in the field. Therefore, pest control and pest control should be done in the early stage when the pests and diseases transmitted by pests have just appeared. Control agent can use 20% of virus A500 times, plus 10% of the net WP or 20% of quebrachosol wettable powder, dubbed 1000 times spray, spray every 7-10 days, even spray 2--3 times, you can receive significant results. 3. Pepper anthracnose. Symptoms: The victim's blade initially became a water-stained spot, and gradually developed into a brown edge, a small gray-white, near-circular lesion, and a black spot on the lesion. The diseased leaves were easy to fall off, and water-stained yellow-brown spots appeared at the beginning of the disease, and then gradually expanded into near-circular or irregular brown depressed spots. There are concentric rings and dense black spots on the lesions. When the humidity is high, light red viscous substances can be seen on the lesions, and the lesions shrink and break when dried. Prevention and control measures: 1 Implement crop rotation and use resistant varieties. 2 Seed disinfection, seed soaking in 52% warm water for 12 minutes before sowing, and seed dressing with thiram or 50% methicillin wettable powder with a seed weight of 0.3%. 3 Increase the application of phosphorus and potassium fertilizer, reasonable irrigation, timely removal of old, diseased leaves and diseased fruit. 4 In the early stage of disease, 75% chlorothalonil 600 times solution or 50% methadone WP 500 times solution can be sprayed, sprayed once every 7-10 days, and sprayed 3 times.
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