What are the symptoms of bacterial diseases in plants

Bacterial infection of plants:

1. Spot type. A significant number of plant diseases caused by Pseudomonas infection are speckled. Such as rice bacterial stripe spot, cucumber bacterial horn spot, cotton bacterial horn spot, etc.

Second, the leaf withered type. Most are caused by Yellowmonas infection, which eventually leads to leaf wilting. Such as rice white leaf blight, cucumber bacterial leaf blight, konjac bacterial leaf blight, etc.

3. Rhosobaracia type. Generally, Pseudomonas infects the vascular bundles of plants, blocking the conduction pathway, causing plant stems and leaves to wilt. Such as tomato wilt, potato wilt, strawberry wilt, etc.

Fourth, ulcer type. It is usually caused by Oriwinella flavonaria, and the later lesions are embolized, the edges are raised, the center is concave, and it is ulcerative. Such as citrus canker, vegetable soybean bacterial spotting, tomato fruit bacterial spotting, etc.

5. Rotten type. Most plants are rotted by Owen's bacillus. Such as bacterial soft rot of cabbage, bacterial soft rot of Solanaceae and Cucurbitaceae crops, and basal rot of rice.

6. Deformity. It is caused by the infection of wild bacillus carcinogenesis, which causes deformities and tumors on the roots, necks, lateral roots and branches of plants. Such as chrysanthemum root cancer.

For the above-mentioned pathological types, plant fungal diseases also have similar manifestations. Mainly in fungal infection of plants, the general symptoms are mold, powder, rust, filaments and small black spots, while bacteria do not have these, and the symptoms of bacterial diseases are mainly manifested as "bacterial pus".

Spotted, small spots gradually spread, round or irregular; Leaf withering, gradually expanding from the tip of the leaf margin, reddish-brown to gray-brown; R. solanacearum type, which survives in high temperature and high humidity environment, and infringes on crops with short crop rotation cycles; decaying type, which is not easy to identify at the initial stage, produces dark red spots under the bark; Ulcerative type, initially latent state, prefers to grow at a temperature of 20 30.

Bacterial diseases of plants are spotted, and most of them are caused by infection with Pseudomonasporus. In the early stage, small spots will appear on the leaves, and different plants will show different colors, and gradually spread in the later stage, which will be round or irregular. For example, rice brown spot, cucumber horn spot, cotton leaf spot, etc.

Bacterial diseases of plants and leaf wilt are caused by the infection of Chanthomonas species. When infected, it starts from the leaf margin or leaf tip, and gradually expands from small, from reddish-brown to grayish-brown, which is irregular, which will cause the dry area of the leaf to reach 1 3 1 2, gradually extend the leaf base, and finally the whole leaf wilts.

Rosotanacium wilt is also a bacterial disease of plants, which is tenacious and can survive for years on the virus as well as its residues and compost. Generally survive in a high temperature and high humidity environment, like to invade varieties with weak disease resistance or crops with short rotation cycles, so that their stems and leaves wilt and cannot grow, common tomato bacterial wilt, strawberry bacterial wilt, etc.

There are also rotten types of bacterial diseases in plants, most of which are caused by infection with Erwinella, which mainly damage plant branches. It is not easy to identify at the beginning of the infection, and dark red or yellow-brown spots are produced under the bark, and in severe cases, it will sink when pressed with the fingers, and the water loss will dry up and cause rot and necrosis.

Ulcer type is also a bacterial disease of plants, the initial stage of infection is latent, will not show immediately, in the plant water loss, and slow growth, the appearance of disease spots, not timely ** will make it expand rapidly, resulting in branch breakage and even death. Citrus canker disease is predominant, which prefers to breed at a temperature of 20 to 30.

1. Plant disease refers to the fact that the plant is infected by other tung bonds, or the environmental conditions are not suitable for the state of the pants, and the normal growth and development of the pure and skillful are not possible, and various pathologies appear, which are ultimately manifested as the phenomenon of reduced yield, reduced quality, and even plant death.

2. When plants are infected with diseases, a series of changes often occur in physiology, organization, and morphology, and this gradually changing process is called pathological procedure, referred to as the course of the disease. Plant diseases have a course of disease.

3. After the plant is infected with diseases, it not only causes the yield to decrease and the quality to decline, but also some diseases are easy to cause human and animal poisoning, for example, the sweet potato with black spot disease, the livestock will cause poisoning if they eat this diseased potato.

1. Plant disease refers to the phenomenon that plants cannot grow and develop normally when they are infected by other organisms of eggplant compatibility with other organisms, or when the environmental conditions are not adaptable, and various pathologies appear, which are ultimately manifested as yield decline, quality reduction, and even plant death.

2. When the plant is infected with a disease, a series of changes often occur in physiology, tissue, and morphology, and this gradually changing process is called pathological procedure, referred to as the course of the disease. Plant diseases have a course of disease.

3. After the plant is infected with diseases, selling Zheng not only causes a decrease in yield and quality, but also some diseases that are easy to cause poisoning in humans and animals, for example, sweet potatoes with black spot disease, livestock can cause poisoning if they eat this diseased potato.

It used to be a traditional medicine for the prevention and control of bacterial diseases of rice. This product should not be mixed with other agents. X0D X0A Due to the low temperature, when the liquid medicine is crystallized and precipitated, the temperature of the liquid medicine should be adjusted to about 30 with warm water, and all the crystals in it should be dissolved before dilution for use.

Plant pathology: what are the main symptomatic characteristics of bacterial diseases? (It is recommended to ask questions in this format).

The main types of symptoms of diseased plants are necrosis, wilting, decay and deformity, etc., and there are fewer fading or discoloration; Sometimes there is a spillage of pus. In the field, the symptoms of most bacterial diseases often have the following characteristics: first, the surface of the damaged tissue is often water-stained or oil-stained; second, under humid conditions, the diseased part has yellow or milky white sticky, like bead-like bacterial pus; Third, the affected part of the decaying disease often has a foul smell.