Pepper seedlings prevent disease

Pepper seedlings are susceptible to multiple infections by pathogenic bacteria, resulting in various diseases. There are blight, damping-off, gray mold, sclerotia, and diseases. If we do not prevent and treat it earlier, diseased and weak seedlings will be formed, and the destruction of seedbeds will occur.

First, the main symptoms. The disease at the seedling stage of pepper is mainly manifested in the seedling roots and the base of the stem. It is the first disease on the base of the young stem near the ground. It is initially immersed in water or produces an oval-shaped brown spot. It can wind around the stem for one week. When it is wet, it appears on the lesion. Brown mycelia, sclerotia are formed later and the roots are rotted. Plants appear to stand or fall. The incidence of leaves, manifested as seedling leaves produce flooding, dark brown spots, rot, deciduous and so on. Leaf diseases mainly include leaf spot, scab, anthracnose and brown spot.

Second, prevention and control measures. We must start early, focus on prevention, and comprehensive prevention and control.

1. Selection of disease-resistant varieties: According to the actual situation in each region, the varieties with strong disease resistance and good yield are selected. Seed disinfection work before sowing to kill the germs attached to the surface of the seeds.

2. Site selection for seedbeds: The seedbed should be made of high-dry topography, leeward sunny, easy drainage, loose and fertile soil, and a disease-free plot that has not been planted for more than three years. The manure used in the preparation of nutritious soil must be fully decomposed.

3, soil treatment: seedbed soil must be sterilized treatment, the commonly used method is to apply medicine soil. Medicinal soil preparation methods: (1) carbendazim medicine soil. With 50% carbendazim WP according to 8-10 grams per square meter seedbed, add appropriate amount of fine soil, mixed evenly made; (2) A multi-drug soil. According to per square meter of seedbed with 25% metalaxyl wettable powder 6 grams and 50% carbendazim wettable powder 5 grams, formulated into medicinal soil; (3) Wufu Yao soil. According to the seedbed per square meter, 70% pentachloronitrobenzene powder (5 g) and 50% thiram WP (4 g) were used to prepare the medicinal soil. Medicinal soil generally requires 10-15 kilograms per square meter, can be used "under the cover" method, that is, take 30% of the drug soil as a bedding, after sowing with 70% of the drug coverage.

4, to strengthen management: First, irrigation. Before the planting, the bottom of the plant is poured with water, and it is generally not necessary to water the plant before seedlings. If the bed soil is too dry and must be filled with water, it can be poured with a watering can in the sunny morning. The second is to increase the temperature. To keep the seedbed membrane clean, increase light, increase the temperature, promote root development and seedlings robust growth; Early seedlings, Dingmiao, to prevent seedling shortage, weak; Fourth, the release of wind. Timely dehumidification and drainage, strengthen hardening seedlings, promote seedlings to be robust, and enhance disease resistance.

5. Spraying at the seedling stage: 70% chlorothalonil 800 times solution, 50% carbendazim WP 600 times, or 25% metalaxyl WP 800 times, or 64% antivirus Wettable powder 500 times spray control. At the same time, if a diseased plant is found, it must be promptly removed and destroyed.

Urinalysis Reagent Strips

Ketone Test Strip,Urinalysis Reagent Strips,Urinalysis Reagent Paper,Reagent Strips For Urinalysis

Changchun Medicon Technology Development Co., Ltd , https://www.teststrip.pl