What are the symptoms of powdery mildew on Euonymus kiautschovicus?
Euonymus kiautschovicus is an excellent species among evergreen trees and is also a very good landscaping tree. However, Euonymus kiautschovicus is relatively prone to powdery mildew. Since Euonymus kiautschovicus is an excellent tree species, extra attention must be paid to preventing these diseases during cultivation.
Euonymus kiautschovicus
Powdery mildew on Euonymus kiautschovicus occurs mainly on the leaves, and sometimes also on the young twigs. The pathogen of powdery mildew is an obligate parasitic fungus. The bacteria mainly parasitize the surface of Euonymus kiautschovicus. Infected leaves first develop pale green spots, and soon white powdery growth appears. The white powdery spots are round, and then they join together and spread over the leaves; the leaves generally do not die! When Euonymus kiautschovicus seedlings are affected, the leaves turn from pale green to thin, and may even become distorted, and the seedlings do not grow very vigorously. The powdery mildew pathogen of Euonymus kiautschovicus develops disease through conidia and carries out initial infection. The conidia are spread by wind for repeated infection! As soon as the seedlings grow twigs, they infect each other. In this situation, seedlings that are drought-stressed or watered too much will both become infected.
Symptoms of powdery mildew on Euonymus kiautschovicus and treatment methods
Young people today are not familiar with trees, flowers and plants at all, and some may even find them completely foreign. Below I will give everyone some knowledge about Euonymus kiautschovicus!
Basic knowledge about Euonymus kiautschovicus
Euonymus kiautschovicus belongs to the Celastraceae family, and it is an excellent species among evergreen trees! Its places of origin are China, the Soviet Union, and Japan! It is an excellent landscaping tree! The morphological characteristics of Euonymus kiautschovicus are: an evergreen shrub or small tree, with very dense branches, a spherical crown, very smooth branches and leaves, and a jade-green color; the small branches are nearly four-angled, the leaves are elliptical in shape, with blunt angles at the margins, and the surface is dark green and glossy!
Ecological habits of Euonymus kiautschovicus
Euonymus kiautschovicus is not very demanding about soil. It is highly adaptable, cold-tolerant, drought-resistant, and can be pruned and shaped! In gardens it is mostly used as a green hedge. It can not only be planted in courtyards, streets and around buildings, but is also used in green belts along main roads! Euonymus kiautschovicus is also highly resistant to a variety of toxic gases, and can absorb them and purify the air. It is resistant to smoke and absorbs dust, and is also an ideal landscaping tree species for polluted areas.
Symptoms of powdery mildew on Euonymus kiautschovicus
Powdery mildew on Euonymus kiautschovicus occurs mainly on the leaves! Sometimes it also occurs on the young twigs. The pathogen of powdery mildew is an obligate parasitic fungus. The bacteria mainly parasitize the surface of Euonymus kiautschovicus. Infected leaves first develop pale green spots, and soon white powdery growth appears. The white powdery spots are round, and then they join together and spread over the leaves; the leaves generally do not die! When Euonymus kiautschovicus seedlings are affected, the leaves turn from pale green to thin, and may even become distorted, and the seedlings do not grow very vigorously. The powdery mildew pathogen of Euonymus kiautschovicus develops disease through conidia and carries out initial infection. The conidia are spread by wind for repeated infection! As soon as the seedlings grow twigs, they infect each other. In this situation, seedlings that are drought-stressed or watered too much will both become infected!
Powdery mildew on Euonymus kiautschovicusControl methods 1. In areas with severe disease, the residual fungal bodies should be removed promptly and continuously, to eliminate the source of the pathogen, and to prevent plants from being planted too densely ;
2. During the growing season and at the early stage of disease, spray 0.2-0.3 degree lime-sulfur mixture! Spray once every half month;
3. During the disease period, 25% triadimefon wettable powder at 1000-1500 times dilution, 50% carbendazim wettable powder at 1000 times dilution can be sprayed, with control once every 7-10 days or continuous application 2-3 times.
Euonymus kiautschovicus is an important variety in our country's landscaping industry, but cultivating it requires even more patience and a sense of responsibility! Its most common fungal infection is powdery mildew. This disease develops quickly and spreads very quickly too! So people cultivating this plant can look at the specific treatment methods introduced in the article! Give the motherland another patch of blue sky!
Symptoms of powdery mildew on Euonymus kiautschovicus and control methods
Powdery mildew on Euonymus kiautschovicus occurs mainly on the leaves. Sometimes it also occurs on the young twigs.
Damage characteristics
The pathogen of powdery mildew is an obligate parasitic fungus. The mycelium grows on the surface of the host, and conidiophores and conidia are produced on it.
Symptoms
Affected leaves first develop pale green spots, and soon white powdery growth appears. The powdery spots are round, and later join together; the leaves generally do not die. When seedlings are affected, the leaves become pale green and thin, and may even become distorted, and the seedlings grow poorly.
Disease pattern
The powdery mildew pathogen of Euonymus kiautschovicus overwinters as conidia and carries out initial infection. The conidia are repeatedly spread by wind for infection. Seedlings, sprouting shoots, and young leaves of the current year are susceptible to the disease; densely planted leaves pressing against each other favor infection by the pathogen; seedlings under drought stress or with excessive nitrogen fertilizer and water are prone to the disease.
Control methods
1. In areas with severe disease, diseased remains should be removed promptly and continuously, to eliminate the source of the pathogen, prevent plants from being planted too densely, and prune hedges promptly;
2. During the growing season and at the early stage of disease, spray 0.2-0.3 degree lime-sulfur mixture. Spray once every half month;
3. During the disease period, 25% triadimefon wettable powder at 1000-1500 times dilution, thiophanate-methyl wettable powder at 1000-1500 times dilution, or 50% carbendazim wettable powder at 1000 times dilution can be used, with control once every 7-10 days, and continuous application 2-3 times.