What is the symptom of big leaf yellow poplar powdery mildew?
Symptoms of powdery mildew of Euonymus tomentosa: the powdery mildew is mostly distributed on the front of the leaves, and some grow on the back of the leaves. A single lesion is round and white, and it is irregular after enlargement and healing. The primary disease showed yellow round spots when the superficial white powdery hyphae and spore layer were wiped off. In severe cases, the disease of new shoots can reach 100%. Sometimes the diseased leaves are shrunk and the diseased tips are twisted and atrophied.
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Control Techniques of Powdery Mildew of Euonymus Japonica
Powdery mildew occurs widely, which affects its ornamental quality and restricts its application in landscaping. Symptoms: Powdery mildew mainly harms the leaves of Euonymus Japonica, and the disease spots are mostly distributed on the leaves, resulting in powdery mildew spots. When the disease is serious, leaf back and new shoots can also occur, resulting in leaf shrinkage and deformity, new shoots twisted, atrophy and stop growing, and cause deciduous and withered shoots. At the beginning of the disease, many white round spots were scattered on the leaves, and as the spots gradually expanded, irregular large spots formed, even occupying all leaves. For example, the disease spot table
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Populus tomentosa and Fufang tree
Alias: Zhengmu Fufang holly Euonymus family name: Celastraceae category: shrub Latin name: Euonymusjaponicus morphological characteristics: evergreen shrubs or small trees. It is 5-6 meters high. Branchlets green, slightly 4-angled. Leaves opposite, elliptic or Obovate, margin with obtuse teeth, surface dark green, glossy, leathery. May flowering, flowers green and white, 5-12 Cymes, axillary at the top of branches. The fruit is ripe in October, the capsule is oblate, pink-green, 4-valved after maturity, the aril is orange-red.
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