Prevention and Control of Flower Root Cancer Disease
Sharing content about flower clinics, the prevention and control of flower root cancer disease, next, the editor will introduce.
Root cancer disease is also known as crown gall disease. Root cancer in cherry blossoms and roses mainly occurs at the root collar, but it can also occur at the roots and aboveground parts. In the early stage of the disease, small round tumor-like masses appear, which gradually increase in size and harden, with a rough, cracked surface and color changing from light to dark brown or blackish brown, with internal woodiness. The tumors vary in size, with some as large as a fist or even larger, numbering from a few to more than a dozen. Due to the damage to the root system, the affected plants grow slowly, and in severe cases, the whole plant dies. In addition to affecting cherry blossoms and roses, the disease can also harm dahlias, lilacs, begonias, geraniums, roses, plum blossoms, as well as more than 300 species of trees, forests, and fruit trees.
Disease Development Patterns
The pathogenic bacteria and tumors survive and overwinter on the epidermis and in the soil, and can survive in the soil for more than one year with diseased tissue residues. The bacteria are spread through water, underground pests, grafting tools, agricultural implements, etc., and diseased seedlings and cuttings can be transmitted over long distances. After the bacteria enter through wounds, symptoms may appear after several weeks or more than one year. The disease has a high incidence in alkaline, humid sandy loam, and continuous cropping favors the disease, with more severe symptoms in plants with many root wounds.
Prevention Methods
① Strengthen quarantine, diseased seedlings can be soaked in 500-2000ppm streptomycin solution for 30 minutes or 1% copper sulfate solution for 5 minutes, then rinsed with clean water before planting.
② Implement more than 2 years of crop rotation in severely affected areas or plant after soil disinfection with chloropicrin.
③ Careful cultivation to avoid various types of wounds.
④ Change cleft grafting to bud grafting, and grafting tools can be disinfected with 0.5% potassium permanganate.
⑤ Severely affected plants should be removed, and lightly affected plants can be watered with 402 at a dilution of 300-400 times, or after tumor removal, apply 500-2000ppm streptomycin or 500-1000ppm terramycin or 5% ferrous sulfate to the wound. It has also been reported that applying methyl iodine solution (methanol 50 parts, glacial acetic acid 25 parts, iodine tablets 12 parts) to tumors has a therapeutic effect; Agrobacterium radiobacter strain 84 can be used for biological control.
The detailed explanation of the prevention and control of flower root cancer disease (figure) mentioned above, hoping this article can bring you help in green plant management!