How to prevent and cure the root nodule disease of cherry blossoms
The gorgeous cherry blossoms are loved by people, but they are susceptible to a deadly root nodule disease. The disease mainly occurs on the trunk and lateral branches of the root and aboveground parts of cherry blossoms. In the early stage of the disease, the rhizome was swollen with a spherical or hemispherical tumor, and the young tumor was white, soft and smooth. After that, the tumor gradually enlarged, the texture became hard, brown or dark brown, the surface was rough and cracked, and gradually infected to the main root, lateral root and even capillary root from the rhizome, and each node expanded into tumors of different sizes. as a result, the cherry blossoms grew slowly or even stopped growing, and the whole plant withered for 3 to 5 years. The incidence of seedlings is high, especially in the scion junction of grafted rootstocks.
This is caused by bacteria of the genus Candida. With the spread of air and Rain Water, the wound is easy to be infected. Prevention and control methods:
1. Strict quarantine control. Diseased seedlings are found to be destroyed on the spot, and the purchase of diseased seedlings is prohibited.
two。 Carry out crop rotation. For plots that have suffered from cherry root nodule disease, diseased trees and diseased roots should be thoroughly dug up and burned, and tree species should be renewed, and cherry blossoms should not be planted within 3 years.
3. Physical control. When the cherry blossoms were dormant in late autumn and early winter or early spring, the diseased trees were dug up, the root nodules were cut, and the wounds were smeared with 500~1000ppm 's oxytetracycline, and then transplanted to disease-free areas with better site conditions for fine management.
4. Drug prevention and treatment
Before the arrival of the rainy season, ① irrigated the affected area with "402" of 300 × 400 times, once every 10 days, continuously for 3 times, and the effect was better.
When symptoms were found in the growing season of ②, the tumor was removed in time, and the wound was smeared with 1000~2000ppm streptomycin or 500~1000ppm oxytetracycline, and then buried.
③ soil was disinfected with cobalt chloride or mercuric water.
Before planting ④ seedlings, the roots were soaked in 500~1000ppm streptomycin for half an hour, or soaked in 1% copper sulfate solution for 5 minutes, rinsed with clean water and then planted.
- Prev
How to prevent and cure the perforation of cherry blossom brown spot
Symptomatic perforation can be divided into perforation caused by fungi and bacteria. Cherry blossom brown spot perforation is caused by fungi, which is mainly harmful to leaves and also infects new shoots, starting from the lower part of the crown and gradually spreading upward. In the early stage of the disease, there were needle-like purple-brown spots on the front of the leaves, and then expanded into round or nearly round spots with a diameter of 3-5 mm. The brown spots appeared on the edges of the brown spots, and gray-brown mildew spots appeared on the later spots. The edge of the spot produces a separation layer, and the lesion dries up and falls off, forming a perforation. Second, the incidence regularity of cherry blossom brown spot perforation pathogen in diseased leaves or tips
- Next
How to prevent cherry root cancer?
How to prevent cherry root cancer? The tumor at the cherry root neck is caused by a bacterium belonging to the genus Agrobacterium and is called cherry root cancer. The most obvious symptom of this disease is the formation of spherical or hemispherical nodules at the root neck. The nodules are white and soft in the early stage, then gradually enlarge and lignify. The tumor surface is rough, brown or dark brown. Cherry root cancer often causes poor growth of the plant above ground, yellow leaf color, serious plant death. The pathogenic bacteria of cherry root cancer survive and overwinter in the surface layer and soil of the diseased plant cancer tumor.
Related
- Fuxing push coffee new agricultural production and marketing class: lack of small-scale processing plants
- Jujube rice field leisure farm deep ploughing Yilan for five years to create a space for organic food and play
- Nongyu Farm-A trial of organic papaya for brave women with advanced technology
- Four points for attention in the prevention and control of diseases and insect pests of edible fungi
- How to add nutrient solution to Edible Fungi
- Is there any good way to control edible fungus mites?
- Open Inoculation Technology of Edible Fungi
- Is there any clever way to use fertilizer for edible fungus in winter?
- What agents are used to kill the pathogens of edible fungi in the mushroom shed?
- Rapid drying of Edible Fungi