Pepper is widely planted in China. According to statistics, pepper is prone to various diseases, such as blight, anthracnose, brown spot, squatting, etc., so a large number of pesticide fungicides should be used in the cultivation process. How to identify and prevent it? What are the various diseases? Baiheyuan summarizes for you as follows:
Plague
Symptoms: When the air humidity is high, there are grayish white powdery mildew on the surface of the plant's diseased part. The disease will be blighted and the roots will be brown and rotted soon after the onset. The incidence is fast and spread rapidly, and special attention should be paid to prevention and treatment.
Prevention: The spread of pepper blight requires water, and if there is no water, it cannot spread and develop. Therefore, when controlling, pay attention to drainage and drying the soil. 1. Rotate peppers and non-solanthoids and melon crops for 3 years; 2. Use sorghum or high-cab cultivation for shallow planting; 3. Control raining season properly; 4. Chemical control. Spraying prevention before onset: You can use the Lubang '98 wettable powder 600 times diluted sprayed leaves, or 1000 times diluted irrigation root; can also be sprayed with 12% green milk copper EC 600 times; spraying treatment at the beginning of the disease: every 5-7 days, even spray 2-3 times. It can be sprayed with a mixture of 58% metalaxyl Mn-Zn wettable powder 600 times or 2% amino oligosaccharide 1000-1500 times.
2. Anthrax
Symptoms: It mainly occurs on the fruit, first produces water-stained yellow-brown spots, and after expansion, it has a circular spot, the fruit will be sunken and irregularly deformed; the leaves are easy to fall off.
Prevention and control: Anthrax is easy to be popular in the summer and autumn rainy seasons, especially in some plots with high planting density and poor ventilation. 1. Seed disinfection. Before sowing, soak seeds with 55 degrees warm water for 10 minutes, and then germination and sowing after cooling; 2. Choose 2 years without planting solanaceous fruit, well-drained field cultivation, strengthen ventilation and light; 3, chemical control. Wet powders such as Manganese Zinc, Dasheng, Kebo, and Suikejing can be used, and the strains are sprayed according to the appropriate ratio.
3. Brown spot disease
Symptoms: mainly damage the leaves, forming round or near-round lesions on the leaves. The lesions are brown at the beginning of the disease, gradually turning gray-brown with the development of the lesions, the surface is slightly raised, and there is a yellow halo around the periphery. A light gray center surrounded by dark brown, and the diseased leaves turn yellow when severe. The stem is also infected, and the symptoms are similar to the leaves.
Prevention and control: 1. After harvesting, the agricultural measures will completely remove the diseased plants and fallen leaves, and will be burned intensively, and the non-solanaceae vegetables will be rotated for more than 2 years. 2, seed disinfection before sowing with 55 ~ 60 ° C warm water soaking for 15 minutes, or 50% carbendazim WP 500 times soaking seeds for 20 minutes, rinsed and germinated. At the time of live broadcast, 50% carbendazim seed dressing with a seed weight of 0.3% can be used. 3. When the facility is cultivated in a disinfected and protected area, the aerosolized shed can be used before the planting (there is no vegetable in the shed), and the residual bacteria in the shed are killed. Sulfur fumigation is commonly used in production. Each 100 cubic meters of space is 0.25 kilograms of sulfur, and the saw is not mixed with 0.5 kilograms. 4, chemical control. In the early stage of the disease, spray 40% pyrimethanil 600-800 times solution, or 1:1:200 Bordeaux mixture, or 56% azoxystrobin 1200-1500 times solution, or 36% thiophanate-methyl suspension 500 times. Liquid, or 50% mixed sulfur suspension 500 times solution, or 20% benzoin cream 350 times solution, or 50% captan WP 400 times solution, spray once every 7 days, continuous control 2 ~ 3 times.
4. Falling disease
Symptoms: When the seedlings are inoculated, the stems of the plants are flooded in the early stage, and they are dark green. When the time is long, the seedlings will fall into pieces.
Prevention: Capsicum ankle disease is mainly induced in cold, cold, humid and other conditions. It is recommended to use the following methods to prevent and control: 1. The seedbed should be set in a field with high topography and good drainage; 2. The seedbed soil should be sterilized; 3. Chemical control. The vaccine is sprayed every 5-7 days, and it can be sprayed with 30% methyl carbaryl or 75% dakonin WP 1000 times diluted.
More pesticide knowledge , please pay attention to China Pesticide Network
.jpg)
Safety Disposable Clothing,Medical Isolation Clothing,Icu Isolation Clothing,Hygienic Isolation Clothing
GUANGZHOU HTD INTERNATIONAL , https://www.maskhtd.com