Prevention and maintenance of Baxian Flower virus Disease

The eight Immortals are native to Japan and Sichuan, China. It was introduced to England in 1736. Cultivation is more common in Europe, Holland, Germany and France. Red, blue and purple flowers can be seen in florists. There are also a lot of Immortals planted in front of small gardens and buildings. RamppJungpflanzen is a world-famous manufacturer of eight Immortals, and it is also the most important cultivation and production unit of new varieties of eight Immortals. Secondly, the door model text company of the Netherlands and the Yag nursery in Israel are also the main producers of eight immortal flowers. In Asia, mainly Japan is rich in eight fairy flowers, in horticultural shops in a wide variety of eight fairy flowers, you can see many strange new varieties, expensive, all as a family potted ornamental.

Eight Immortals virus disease, also known as rust ball virus disease, eight immortals 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.

Conservation of eight Immortals:

The eight Immortals, also known as Hydrangea and Hydrangea, should change the basin once a year in early spring and add new culture soil (rotten leaf soil, garden soil and a small amount of sand). When changing the basin, remove some of the old soil and rotten roots, and trim them properly.

Baxianhua likes fertilizer. During the period of growth and development, the mature thin liquid fertilizer is applied every 15 days. In order to keep the basin soil acidic, 100 grams of ferrous sulfate is added to 50 kg of liquid fertilizer for watering. When the potassium dihydrogen phosphate solution was added to the bud stage, the flower was big and colorful. The leaves of Baxian flower are hypertrophic and require more water. Watering in spring should be sufficient to keep the basin soil moist, especially in hot summer. From May to August, it is necessary to spray water on the leaf surface once a day or every other day. As the eight Immortals are fleshy roots, too much water is easy to rot roots, so watering should not be excessive. Pour out the stagnant water in the basin in time after the rain. After September, it is necessary to gradually reduce the amount of water to make the branches grow strong. Frosts Descent moved into the room and kept the room temperature at about 5 ℃ to promote its dormancy. The leaves should be removed before the beginning of winter to avoid rotten leaves.