It is known to all that Peony is very elegant and beautiful. However, in the growing period, there are often various diseases. More than 20 species have been identified, including 15 fungal diseases, 3 viral diseases, and 1 nematode disease. And lack of factors and so on. Most of the leaf diseases of peony are fungal diseases, erythema and gray mold are the most serious of these diseases. They cause partial leaf necrosis or dead whole leaves. The pathogenic fungi are T. peony and ash botrytis, peony, respectively. Botrytis Others include ringworm disease, gray spot disease, spot disease, round spot disease, anthrax, rust, and powdery mildew. They often make peony leaves early, affecting vitality. Some of these diseases even occurred after the peony flowering period. However, it is not negligible to influence the breeding and growth of peony flower buds. Prevention and treatment of such diseases should pay attention to cultivation management, clearing the garden in winter, and thoroughly clearing fallen leaves in the autumn. Water should be prevented from retaining water on the leaves. A reasonable ratio of N, P, and K should be applied to the fertilizer, and the cover can not touch the leaf base to remove the diseased leaves in time. Withered leaves, regular spraying of phthalimidazole pesticides (such as carbendazim), organic sulfur preparations (such as zesin) or chlorothalonil, etc., can control or reduce the damage of leaf pathogens. Branches of peony disease The above-mentioned gray mold fungus, red spot fungus, and anthrax bacteria can also endanger the branches, causing spots, ulcers and other symptoms. Stem rot, also known as sclerotinia, causes the stem base or middle part to appear grayish-white rot, and there are black large-scale rat fecal nucleus inside and outside the diseased stem. Replacement of diseased soil, replanting of crops, cutting of diseased parts, spraying of nitropisine, benzoimidazole pesticides, or application of sulfur powder can reduce hazards. Due to the wide range of host sites of this bacterium, the rotation planting is not easy to control. The root diseases of peony are white feather disease, white feather disease, purple feather disease, root decay disease, Fusarium root rot and root knot nematode disease. They cause root rot, wilting, and unequal root sizes. Knot. Peony grows poorly, and the root and root neck are susceptible to infection when damaged; soil is heavy and poor drainage is susceptible to disease. Root-knoted diseased plants can be removed from the planting area, some rotten fleshy roots can be cut off, and soil texture and other control measures can be improved to reduce the incidence. There are three kinds of virus diseases on peony, one is mottle virus disease, and dark green and light green concentric rings are formed in the leaves. The pathogen is ring spot virus (PRV). The virus particles are spherical and the locust spreads. The second is peony virus disease. In Japan, it was called rotenokia. It started to talk about green chlorotic spots, followed by ring spots or lenticular spots, sometimes irregularly shaped, and dwarfed. The pathogen is tobacco rattle virus (TRV). Virus particles are spherical. Juice, nematodes, dodder seed, and peony seeds can all be transmitted. The third is peony leaf curl disease, which can make the plants obviously dwarf, only l/2 when normal, the lower branch is bent, the leaves are curled, the branches are weak, and the virus is grafted and transmitted. The pathogen is the peony leaf curl virus (PLCV). Field sanitation, pest control, and tool disinfection are currently feasible prevention and control measures. Others have green lobe disease caused by mycoplasma (MLO), deficiency of magnesium deficiency, potassium deficiency and bud blight caused by low temperature in early spring.
The following dimensions is: Width:750mm*Length:1500m*Thickness:25um
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