What kind of medicine is used for chili sore disease?

Chilli scab symptoms

The disease occurs in areas such as seedlings, leaves, stems and fruits, especially on leaves. The seedlings are affected, and the silvery white spots on the cotyledons are water-stained, and then become dark-colored depressions. Seedlings infested often cause defoliation and plant death. In the early stage of the onset of the leaves of the adult plants, there are small spots of water-stained yellow-green, which are enlarged into round or irregular shapes, with dark brown edges and slightly raised edges, and the central part is lightly sunken and the epidermis is rough and sore-like lesions. The lesions are often linked together, so there are only a few large lesions on the leaves, up to 6 mm in diameter. If there are many lesions on the leaves, the lesions are small, and the plants are the most seriously damaged. The leaves with heavy damage, the leaf margin and the tip of the leaf often turn yellow and dry, rupture, and finally fall off; if the lesion occurs along the vein, the blade often becomes deformed. The scallops have irregular water spots on the stems, and the posterior cork is bulged, and the longitudinal cracks are ulcerative ecchymoses. The lesions on the petiole and the fruit stem are generally similar to the lesions on the stem. A small black or brown bulge on the fruit, or a rash with a narrow water-stained edge, gradually expanding 1-3 mm, raised round or oblong black sore ecchymoses. There is a crack at the edge of the lesion. At the beginning, there is a watery halo. When it is wet, there is a liquid in the middle of the sore.

The disease is caused by bacteria of the genus Xanthomium. The pathogen can be attached to the surface of the seed for wintering, becoming a source of long-distance infection, and can also overwinter in the soil with the diseased body. The spread of field spread mainly depends on irrigation water and farming operations. The bacteria can only infect from wounds and orifices. After the onset of the plant, the diseased part overflows the pus and can spread and spread.

Capsicum disease

Most of the pathogens occur in the hot and rainy season from July to August. After the storm, due to the increase of wounds, it is also conducive to the spread and infection of bacteria, and the disease is serious. Under the condition of long-term high temperature and high humidity, the lesions on the leaves do not form a sore-like shape and rapidly expand into a leafy burnt spot or a plurality of small spots formed on the leaves and a large amount of shedding. The incubation period of the disease is prolonged as the temperature decreases. Generally, the leaves are 3-6 days at a suitable temperature (27 ° C) and about 5-6 days on the fruit.

The incidence of pepper scab

The disease is caused by the infection of S. sphaeroides. The pathogens mainly overwinter on the surface of the seeds and become the source of initial infection. After contact with the host leaf, the bacteria invade from the pores or wounds and multiply in the intercellular space, causing the epidermal tissue to thicken into a sore-like shape. The pus on the diseased plaque is spattered by rain or spread by insects. The disease is easy to occur in the hot and rainy season, especially after the heavy wind and heavy rain, it is easy to induce the serious occurrence and prevalence of the disease. The suitable temperature for pathogen development is 27-30 °C. If the temperature is high and high humidity for a long time, the lesions on the leaves do not form sores and rapidly expand into leafy orange coke or many small spots on the leaves, causing a large number of leaves to fall off. In the plots of continuous cropping, low-lying land, poor drainage, and poor fertilizer growth, the incidence is also heavier.

Chili scab disease prevention and control measures

1. Carry out rotations and rotate with non-solanaceae vegetables for 2-3 years.

2, in the disease-free new soil seedlings, to prevent the seeds with pathogens.

3. Seed disinfection. Seeds are first immersed in cold water for 2-3 hours, soaked in warm water at 50 °C for 30 minutes, then placed in cold water to cool, and then germinated.

4, sorghum planting, to avoid accumulation of water, so that there is no water in the rain.

5, deep soil, strengthen loose soil, topdressing, promote root development, improve plant disease resistance, and pay attention to the reasonable mix of nitrogen, phosphorus, potassium fertilizer, advocate the application of fully decomposed organic fertilizer or plant ash, biological fertilizer.

What medicine is used for chili sore?

The following agents can be used for prevention and treatment: 1:1:200 times Bordeaux mixture, streptomycin or neomycin oxytocin 4000 times, 60% succinate aluminum (DTM) wettable powder 500 times solution, 77% can be killed (hydrogen Copper oxide) wettable powder 400-500 times spray. One of the above agents may be used alternately, sprayed once every 7-10 days, and sprayed 2-3 times depending on the condition.