Other diseases causing tomato dead fruit

The loss of dead trees in a fruit-filled period is a big headache for vegetable farmers. In addition, after investigation and analysis, in addition to bacterial wilt, the main reasons for the dead fruit in tomato fruit are tomato phytophthora root rot, tomato stem rot, tomato wilt disease and tomato bacterial pith necrosis and other diseases. In order to prevent problems, the analysis of the disease that can lead to tomato dead trees in the fruit period is presented below for the reference of farmers.

Symptoms and prevention of dead-tree symptoms caused by various diseases

1. Phytophthora root rot disease: At the beginning of the disease, brown spots are produced on the stem base or roots, and the sag is gradually enlarged. In severe cases, the lesions circumnavigate around the stem base or roots, resulting in wilting of the top stems and leaves, and the whole plant wilt. Removal of diseased roots showed fine root rot, coarse root browning. Cut open the roots of the disease, it can be seen that there is a browning of the vascular bundles from the roots and necks, the later root rots, no new roots, and the plants wither and die.
The disease is more common in management mistakes, such as low ground temperature after planting, high soil moisture, and long duration, or in case of cloudy days can not release air in time, the formation of high temperature and humidity conditions, especially after the flood irrigation will lead to the disease Occurrence and popularity.

2. Stem rot: fungal diseases. Only harm the stem base. At the beginning of the disease, the cortex of the stem base has light brown and dark brown spots, which can circulate around the base of the stem, causing the cortex to rot, and the surface of the diseased part often forms sclerotia of different sizes in dark brown color, which is different from early blight. Cut open the base of the diseased stem, showing that the xylem turned dark brown. The leaves of the diseased plants turned yellow and wilted, and the later leaves were yellowish-brown and dead and remained on the branches without falling off. Pull out the diseased plant and the root system does not rot.
After the onset of disease, hymexazol plus naphthalene acetate can be applied to the base of the stem to cover the heap at the base of the diseased plant and bury the diseased part to promote the emergence of adventitious roots above the lesion, which can delay life and strive for yield.

3. Fusarium wilt: In the early stage of disease, the middle and lower leaves wilted before and after noon, and they recovered sooner or later. After the wilt increased, the leaves turned yellow from the bottom up, and the soft rot finally died. The base of the stem is water-stained near the ground, and when it is wet, pink or blue-green molds are produced. At the base of the incision, the vascular bundle becomes brown. The course of the disease progressed slowly, generally 15 to 30 days before death, no milky white mucus outflow, different from tomato bacterial wilt.
At the beginning of the disease, 78% Cobo WP can be sprayed 600 times or 50% sulphur suspension 500 times, about 10 days.

4. Tomato canker disease (bacterial myeloid necrosis): The infected plants become infected. The bacteria rapidly expands in the phloem and the pith. The early lower leaves wither or curl, like a lack of water, one side or part of the leaflets wither; Stem The interior becomes brown, and it develops up and down. In the later period, there are empty cavities of varying lengths. Finally, it sinks or cracks. The stems are slightly thicker and give rise to many adventitious roots. When the humidity is high, fungal pus overflows from the stem or petiole or attaches to it, forming a white stain. Finally, the whole plant withered and the upper parietal lobe was bluish. A unique "bird's eye spot" forms on the fruit.
In the early stages of ulcer disease, 15% Saibo WP 800-1000 can be sprayed and sprayed once every 9 to 12 days.

5. Root knot nematode damage: The disease mainly damages the tomato roots, making the roots appear more than a large malformation, was chicken-like. Cut open roots or swollen roots, visible in the body milky or yellowish female body. The above-ground parts of plants showed poor development, yellow leaves, and short plants. The results were small and small, yield was low, and fruit quality was poor. During drought, the diseased plants are easy to wilt until pruning dead and serious losses.
The control of root-knot nematodes can only be carried out during the shed season, such as Bromomethrin, lime nitrogen, etc., and the control effect can be up to one season. If the vegetables after colonization are infected with root nematodes, avermectin can be added. Harvest No. 1 or Volvo, etc. to control root nematodes to maintain the normal growth of vegetables.

The vision training equipment includes the annular vision training system, which helps students to establish the concept of coordinate axis and Angle, enhance the vision field and the eye movement ability, train the visual cognition and visual tracking, and is conducive to the rehabilitation of low vision caused by amblyopia. If you would like to purchase Visual Training Equipment, Convenient Circular Vision Tracking Trainer, please contact us.

Visual Training Equipment

Vision Trainer,Visual Training Equipment,Convenient Circular Vision Tracking Trainer,Circular Vision Tracking Trainer

jinan Fangqi Sunshine education consulting CO.,LTD. , https://www.fzrehabmarket.com