What are the medicines for the prevention and control of soft rot?

Soft rot is generally caused by bacteria, bacterial diseases, with tetramycin, shenazinin, thiazole zinc, mesangmycin, allicin, polyantimycin, agricultural streptomycin, amine acetate, chlorbromide isocyanurate, spring thunder king copper, thiobacine copper, or quinoline copper, copper hydroxide, copper pineinate, leaf dryazole, copper noble, can kill three thousand sprays, spray evenly do not miss spray. Control humidity and do not flood with water.

For coriander seedlings, if there is a situation of rotten roots and dead seedlings of coriander yellow leaves, it is usually caused by root disease or leaf disease; If farmers make the density of coriander planting too large when planting, it will lead to poor ventilation ability between coriander seedlings and weak light transmittance, which will easily cause the yellowing of coriander leaves.

In addition, if coriander seedlings are attacked by pests, after underground pests eat the roots of coriander, it is easy to cause the leaves of coriander to turn yellow; Improper use of pesticides or fertilizers can also cause yellowing of coriander leaves; Soil drought or excessive rain is prone to the accumulation of pathogens, which causes the leaves of coriander to turn yellow.

2. Common root diseases of coriander.

1. Bacterial leaf spot.

Coriander bacterial leaf spot usually appears after rain, or when the air humidity is high, at the beginning there will be a small spot on the leaves of the coriander, as the disease progresses, it will cause the leaves on the side of the coriander to turn yellow, and in severe cases, the coriander will be directly perforated from the spot.

2. Physiological yellow leaves.

Because coriander is a cold-tolerant vegetable, in the case of high temperature and drought, when the environment is not conducive to the growth of coriander, the stress resistance of coriander plants will decrease, and calcium deficiency will occur in the case of high temperature and drought, resulting in a large area of sunburn.

3. Prevention and control of rotten roots and dead seedlings of coriander yellow leaves.

In order to deal with diseases such as rotten roots and dead seedlings of coriander yellow leaves, farmers need to strengthen field management, timely drainage and waterlogging prevention, and reduce the accumulation of pathogenic bacteria in the field.

The control of soft rot needs to be carried out in the planting process as well as in the use of medicines.

First, the key points of plant protection, improve cultivation management technology, strengthen agricultural disease prevention measures: before planting, the soil needs to be deeply exposed, and crops such as beans and onions and garlic are the best in the previous stubble; The terrain should be drained and irrigated, which is convenient to prevent soil clay and heavy; Sowing and planting at the right time to avoid the susceptibility stage of the heart wrapping period and the local rainy season.

2. Medication plan, 1. Prevention plan: 38% oxazine copper strobin is diluted and sprayed at 1000 times, and the drug is used once every 7 days.

2. ** plan: when the disease is mild, 38% oxazine copper strobin is diluted and sprayed according to 800 times of liquid, and the drug is used once every 5-7 days; When the condition is severe, it is sprayed according to 600 times dilution of the solution, and the drug is used once every 3 days, and the number of sprays depends on the condition.

Precautions for the prevention and control of soft rot:

1. Choose disease-resistant varieties: there are great differences in soft rot resistance between varieties, and there are many varieties that are resistant to soft rot at present, and suitable disease-resistant varieties can be selected according to different seasons and different cultivation methods, and this method has the best effect.

2. Implement crop rotation: pathogenic bacteria mainly overwinter on the diseased residue and become the source of initial infection in the second year, and the heavy stubble plots often have early and serious disease, so in the area with serious disease, crop rotation can be implemented to reduce the chance of disease.

3. Soil treatment: Before sowing or transplanting, 2 3 kg of 5% imidacloprid granules can be used for hole application, which can effectively control the harmful spread of aphids, planthoppers, thrips and other pests.

The above content refers to Encyclopedia - Soft Rot.

The prevention and control of orchid "soft rot" can be easily solved with only 1 "thing".

Soft rot is mainly harmful to bulbs, the damaged bulbs are brown water-soaked patches at first, and then turn black, the diseased part gradually softens and decays, and there is gray pus-like mucus in the affected area, which has a special odor. High temperature, high humidity and poor ventilation are the main conditions for the occurrence of this disease.

Control methods: select healthy and disease-free bulbs for breeding; In the rainy season, pay attention to ditch cleaning and drainage, and reduce the water level; Before sowing, soak seeds in 50% benzimidazole 500 600 times for 20 30 minutes, dry and then seed; When harvesting and shipping, try not to hurt the bulbs as much as possible, and pay attention to ventilation and cooling during the storage of the bulbs.

5.Pests are mainly grubs and aphids. Grubs bite the bulbs, causing rot.

Insect pests can be irrigated with 50% phoxanthion EC, or 90% trichlorfon crystals, or 50% carbaryl wettable powder 800 times, with 150 200 grams per plant. Aphids occur in early summer and feed on the sap of young stems and leaves, causing plants to wither. Found aphids with 100 grams of dimethoate, mixed with 40 50 kg of water spray can be **.

The prevention and control of orchid "soft rot" can be easily solved with only 1 "thing".

Mainly: 3000-4000 times of agricultural streptomycin soluble powder;

Dixone wettable powder 800 1000 times liquid irrigation roots;

90 120 ml of thioxenic copper or 20% thiasen copper per mu;

2500-4000 times of neo-phytomycin wettable powder;

600 800 times of ammonium dyssen wettable powder;

800 times of chlorsyrupolin;

400-600 times of copper hydroxide wettable powder;

1500 times of copper hydroxide water dispersible granules + 750 times of 50% chlorobromoisocyanuric acid wettable powder;

Chunlei Wang copper wettable powder 500-700 times liquid.

Please refer to it! Sorry, it should be sprayed with avermectin 2000-3000 times for prevention and control. Before and after the rain, spray the disease prevention agent 72 agricultural streptomycin sulfate soluble powder 4000 times, or neophytomycin 4000 times, 50 succinate copper fertilizer wettable powder 500 times.

Bacterial soft rot is a devastating disease and the main disease of spirit vanilla, which can occur all year round, with the fastest epidemic rate before and after flowering. It mainly damages leaves, stems, flowers and other parts, resulting in rotten leaves and rotten tops. Prevention and control methods:

In winter, the garden was cleared and the remains were burned to reduce the source of overwintering diseases; When planting, disease-free seedlings are selected or seedlings are disinfected; Before the obvious disease center was formed in the field, 500 times of 75% chlorothalonil wettable powder or 250 times of 25% carbendazim wettable powder, 200 mg of agricultural streptomycin was added to each kilogram of liquid for spraying, once every 7 days, sprayed 3 4 times.