Herbal Medicine,Herbal Medicine San Diego,Herbal Medicine Degree,Herbal Medicine Books Fruit-Vegetable Powder, Herbal Medicine Co., Ltd. , http://www.nbplantextract.com
The three major diseases of pepper control measures
I. Symptoms of pepper wilt: The leaves of the diseased plants wilted at noon and returned to normal after the evening. After 2 to 3 days, the whole plant gradually withered, 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 the hand-squeezed sections had filthy white mucus that was exuded by bacteria. Control measures: 1 Crop rotation with grass crops. 2 plant disease resistant varieties. 3 Acidic soil is conducive to the growth and reproduction of germs. Therefore, 60 to 80 kg of lime should be applied per 667 m2 (1 mu) in combination with the soil to mix and sterilize 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, use 20010-6 streptomycin sulfate or 20% Yeqing double 800-times watering roots, pouring about 250 ml per plant. Sprinkle once every 7 days. Second, the symptoms of pepper virus disease: diseased plants showed mosaic, yellowing, necrosis, deformity four types. Occurrence of mosaic type, diseased plant leaves chlorotic, resulting in yellow-green mottled or tan ring spots, young leaves become narrower victims, leaf margins on the roll, leaf veins shrinkage deformity, uneven foliage. 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 before sowing for seed disinfection. 2 Minimize agricultural operations to avoid human transmission. 3 The disease has been proven to be mainly transmitted by locusts and fleas in the field. Therefore, pest control should be done well when the insects that had transmitted the virus had just appeared in the early stage. The control agent can use 20% virus A500 times liquid, add 10% of the net WP or 20% chlorfenone WP, and mix it with 1000 times spray, spray once every 7-10 days, even spray 2 ~ 3 times can receive significant results. Third, the symptoms of pepper anthrax: the victim leaves the beginning of the water stains chlorotic spots, and then gradually developed into a brown edge, the middle gray, near-round lesions, lesions on the round of small black spots. The diseased leaves were easy to fall off, and water-stained yellow-brown spots appeared at the beginning of the disease. After that, the disease gradually enlarged into a brownish-stained lesion with a nearly circular or irregular shape. 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, soaking with warm water at 52°C for 12 minutes before sowing, and seed dressing with 0.3% to 0.5% of the total seed amount of Formamide or 50% Ketoden WP. 3 increase the application of phosphorus and potassium fertilizer, reasonable irrigation, the implementation of scientific management, improve disease resistance, timely removal of old, diseased leaves and fruit. 4 Chemical control can be sprayed with 75% chlorothalonil 600 times solution or 50% methadone WP 500 times in the early stage of the disease, spray once every 7-10 days, and spray 3 times.