What are the prevention and control methods of root rot nematode disease of rich trees?

Root rot nematode, also known as short body nematode, is widely distributed, and it is harmful to this genus nematode all over the world. In addition to crops, green plants such as rich trees are also difficult to survive, so what are the prevention and control methods of root rot nematode disease?

I. symptoms and harm of root rot nematode disease of rich trees

With the 4th instar larvae and adults, the root rot nematode tends to the root system of the living host and destroys the cortical part of the root; it causes wounds and creates infection opportunities for the pathogen, but the disabled root rot nematode harms the young roots of the rich tree; some species on some hosts can also harm the vascular bundle tissue.

The root rot nematode infects the root, the root system is rare, and the injured plant loses its vitality; the root absorbs nutrients; the leaf is small and yellowed, the plant type is short, and the plant height of the whole garden is different and easy to lodge; near the infection point, small necrotic spots are formed, and when many root rot nematodes gather, the disease spots unite to form a large piece of tissue rot, and the leaves also appear symptoms similar to black spot.

II. Control methods of root rot nematode disease of rich trees

1. Strengthen the management of soil, fertilizer and water

Increase the application of organic fertilizer and potassium fertilizer, rational irrigation, increase the content of organic matter and improve soil structure.

2. Reasonable load

Keep the tree strong through pruning and reasonable load.

3. Uniform water supply

Do not water too frequently, do not long-term drought, the specific irrigation period, according to the crop growth period of water demand, precipitation, soil conditions, and so on.

4. Biological treatment measures

In each crop growth period, such as the use of organic water-soluble fertilizer to promote crop rooting, supplement trace elements and organic matter, crop root system has been developed, balanced nutrition, improve crop disease resistance and stress resistance, while foliar spraying.

If the disease occurs, foliar spraying with effective fungicides can control the spread of the disease by irrigating the roots of the plants with serious disease, spraying continuously and irrigating the roots for 2 to 3 times at intervals of 5 to 7 days. In the later stage, the slow seedling was sprayed with foliar fertilizer and organic water-soluble fertilizer for comprehensive conditioning.

In order to take good preventive measures for root rot, the selection of rich tree varieties is the key to lay a good foundation for the healthy growth of the coming year.

5. Routine treatment measures

(1) clear the soil

First of all, the rich tree needs to be taken out of the flowerpot, and the action is lighter in the process of implementation, so as not to hurt the root system. Then clean up the soil on the surface of the root system.

(2) pruning

Cut off all the rotten and blackened roots of the rich tree and trim them from the top to the bottom until the normal and healthy roots are exposed.

(3) Disinfection

Prepare a container, put diluted potassium permanganate solution or carbendazim solution in it, and then put the pruned wealth tree into it and soak it for about three hours to fully disinfect and sterilize.

(4) dry

After disinfection, put the wealth tree in a cool and well-ventilated position to fully dry. In order to avoid the lack of water and wither the leaves in this process, the leaf surface of the wealth tree can be sprayed with fresh water regularly.

(5) planting

Wait until the rich tree is dried, you can plant it in the pot, be careful not to water too much, and wait for the end of the basin to maintain normally. If you want to speed up the rooting speed of rich trees, you can use some rooting powder appropriately.