Prevention and control of diseases and insect pests of eight Immortals
High humidity, high humidity, poor ventilation vulnerable to aphids.
Prevention method: timely ventilation. When the disease is serious, it can be sprayed with 1500 times solution of miaphid. Not serious can be manually brushed away. Can also be used cigarette butts or pepper spray, the effect is obvious. Its control methods refer to rose.
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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. Early spring and winter shed
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Prevention and control of diseases and insect pests of eight Immortals
The disease and insect pests of the eight Immortals prevent and control the symptoms of green petal disease of the eight Immortals: the plant is short and atrophied; the color of the inflorescence decreases, the petals usually turn yellowish green, and the flowers are small or without flowers. The route of infection is caused by the infection of mycoplastids (MLO for short). Mycoplastids mainly survive and survive the winter on various perennials such as daisy, spring white chrysanthemum, Plantago przewalskii, Suaeda salsa, unmanned chrysanthemum, bitter borage and other perennials, and mainly infect these plants through leafhoppers. In addition, dodder can also transmit poison. Prevention and control methods 1. Timely elimination and destruction of diseased plants to reduce
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