Fusarium wilt of carnation
Fusarium wilt of carnation occurs in all the planting areas of carnation, and the damage is common.
[pathogen] Fusariumoxysporumf.sp.dianthi (prill.etDel) Snyd.etHans belongs to Fusarium oxysporum and Fusarium oxysporum.
[symptoms] the disease is mainly invaded by the roots of carnation and colonized in the vascular system. Chlorosis, yellowing, browning and wilting occurred in the lower leaves or stem nodes of the damaged plant, which usually occurred only on one side of the plant at first, and then gradually spread from vascular bundle tissue to the upper part of the plant with the spread of the disease, when the top branches and leaves withered. Brown longitudinal cracks appeared between stem nodes. After the young plants were damaged, they often caused growth stagnation or dwarfing; when the stem section was cut open, the cambium became white and dry, and the vascular tissue was yellowish brown. In the later stage of the disease, the root and stem base rotted.
[incidence regularity] the pathogen survives in the remnant or soil of the diseased plant, and can be transmitted by reproductive materials or bacteria-carrying soil, water flow, and invade the plant through the wound on the root, shoot, stem base or cuttings.
[epidemic characteristics] higher environmental temperature, tender and luxuriant plants, lower pH value of soil, stagnant water in soil and wounds caused by root pests are favorable for the occurrence of diseases.
- Prev
Blight of carnation
The pathogen of the disease is called Cucurbitaceae, which belongs to basidiomycetes. Its asexual state is called Rhizoctonia solanacearum, which belongs to semi-known fungi. The pathogen overwintered mainly as sclerotia or mycelium in the soil with the disease residue, and could saprophyte in the soil for 2-3 years. The pathogen directly invaded the host after spreading through water flow and farm tools. The disease is easy to be induced by deep sowing, high temperature and too wet soil, and it is also easy to occur when cultivated in open field. The disease is serious, especially in the warm and rainy season. The symptoms are also known as stem rot and basal rot. Begin to produce dark brown oval or irregular water stains at the base of the stem near the ground.
- Next
Two main diseases of carnation
Carnation is most susceptible to leaf spot, withered branches and calyx rot. The spores of leaf spot blight remain in carnation plants and withered plants and are transmitted through the air. When there is water on the surface of the plant for 8-10 hours continuously, germs can infiltrate while wet. The symptoms of leaf spot blight are as follows: the leaves are grayish brown or the petals appear with purple spots. The spots are formed by black spores, and the branches and stems begin to wither from the internodes and then develop into a circle of withering around the stems. The pathogen of calyx rot remains in the old leaves, lower stems or withered plants of carnation. high
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