Eight Immortals virus disease
Also known as bulbous virus disease, eight immortal mosaic disease. Sporadic discoveries in Beijing, Henan, Hebei and other places. Harm to the eight Immortals, make its plants short, flowers small and light, reduce the ornamental value. Horticultural cultivation in some places to watch its morbid beauty, known as the variegated leaf eight immortals.
Symptoms of systemic diseases, susceptible plants, the whole plant is thin, branches, leaves, spikes of light color, showing a layer of light pink white covered by a layer of light green; leaves in pink green mixed with irregularly shaped pink-white patches, patch boundaries are obvious, separated by leaf veins; leaf margin white. The diseased leaves in the greenhouse are green and white in early spring and winter, and the color contrast becomes smaller after the arrival of high temperature in summer.
Disease regularity, virus disease. Sporadic disease, spread by cuttings in the flower bed.
Prevention and cure method
(1) strict quarantine to prevent spread.
(2) the diseased plant is not used as the mother tree for cuttage propagation. For ornamental purposes, special nurseries can be set up to propagate diseased plants, but the scope should be strictly controlled.
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Promoting cultivation techniques of eight Immortals
Baxian flower, also known as hydrangea, powder ball flower, Ziyang flower, is an ornamental shrub of Saxifragaceae. Potted varieties are about 30cm in height, opposite leaves, inflorescences up to 20cm in diameter, nearly spherical, planted on branches, white, pink, blue-purple, florescence from May to July, suitable culture can be extended to the end of September. Its flower shape is huge, the color is gorgeous, the shape and appearance is beautiful and is favored by the people. There are broad prospects for market development. The eight Immortals is native to China and has become a famous ornamental woody flower in the Yangtze River Basin. The eight immortal flowers have strong adaptability and belong to
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Prevention and control of diseases and insect pests of eight Immortals
It is vulnerable to aphids when it is high humidity, high humidity and poor ventilation. Prevention and treatment: timely ventilation. When the disease is serious, it can spray 1500 times the liquid of Zhiling. It is not serious and can be brushed off manually. It can also be sprayed with cigarette butts or pepper liquid, and the effect is obvious. Its prevention and control methods refer to the rose.
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