Planting Technology Lists
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Control of rhododendron mosaic spot
The symptoms mainly infected the leaves. In the early stage of the disease, small reddish-brown spots appeared on the leaves, which gradually expanded into disease spots or irregular polygonal spots, dark brown. In the later stage, the central tissue of the lesion turned gray. When the disease is serious, the disease spots are connected to each other, resulting in withered and yellow leaves and early fall. Prevention and control methods 1. The fallen leaves were removed and treated in autumn, and the diseased leaves were removed in time during the growing season. two。 The planting or potted flowers should have a suitable density, ensure the ventilation and light of the plants, reduce the leaf humidity, and put the potted flowers in the outdoor shade shed in summer to reduce sunburn and machine.
2019-01-16 -
Control of rhododendron brown spot
Brown spot is the main disease of rhododendron. At the beginning, the leaves produced small brown spots, which fused with each other, and gradually developed into large spots, the disease spots were irregular, the positive complexion was darker and the negative complexion was lighter. In the later stage, the middle of the lesion becomes grayish brown, and a lot of black or grayish brown is produced on the spot. In severe cases, the branches are completely exposed and the plants are weak. At the initial stage of the disease, the prevention and treatment scheme was sprayed with Bordeaux solution, or Baume 0.4 degree stone sulfur mixture, or 65% Dyson zinc wettable powder 500 times, or more than 25%.
2019-01-16 -
Breeding azaleas?
Rhododendron propagation technology: mainly to cuttage propagation. Cutting selection, take the year just lignified branches, with heel break off, cut off the lower leaves, leaving 4 to 5 leaves at the top, cutting time: Western cuckoo in late May to early June, Mao cuckoo in early June to mid-June. Cuttage method: family multi-purpose pot inserted, medium with river sand, pearlite. When operating, insert the cuttings into one-third or one-half, spray them with a fine hole pot and place them under a shade. Management: Within 1 month after insertion, focus on shade and water spray. Keep the cuttings always
2019-01-16 -
Tissue Culture technique of Rhododendron
Rhododendron is an evergreen or deciduous shrub of rhododendron family, which has the characteristics of many varieties, early flowering, rich flower color, long flowering period and so on. In recent years, due to the development of cutting propagation technology, the yield of rhododendron in China has been increased. However, due to the small number of female parents and low reproduction coefficient, valuable varieties still can not meet the needs of society. Tissue culture is an effective measure to realize the industrial breeding of rhododendron. The following will be briefly introduced as follows: first, the basic technical link of tissue culture of rhododendron: tissue culture of rhododendron. The explants commonly used are stem tip and stem.
2019-01-16 -
How do azaleas reproduce with strips?
Rhododendron striping propagation is also one of the commonly used breeding methods, generally using high-tech striping. Rhododendron embossing is usually carried out between April and May. The specific operation method is as follows: first, take 2-3-year-old robust branches from the mother plant of potted azaleas, cut open a ring of annular branches about 1 cm wide with a sharp knife 10-12 cm away from the top of the branches, gently peel off the sieve tube of the phloem, cut off the channels for the downward transport of organic matter from leaves, and make them gather, so as to accelerate cell division and form nodular protuberances and germinate root buds. And then use a piece of rectangular plastic thin
2019-01-16 -
How do azaleas sow and reproduce?
Sowing is sexual reproduction. As the seed setting rate of natural hybridization is very low, artificial pollination is generally needed to improve the seed setting rate of rhododendron and obtain more seeds. Its main method is when the azaleas are in full bloom, choose strong female parents with good growth and beautiful colors, move to the greenhouse, leave 3-4 flowers with large flowers and early flowering in each pot, pick the stamens and new buds near the flowers, and concentrate nutrients. When mucus appears on the head of the style, just use a new brush to dip the pollen of the male parent and apply it for a few times. One week after pollination, the flowerpot
2019-01-16 -
The cultivation of rhododendron pays attention to the suitable temperature.
Rhododendron has damage when the temperature is too high or too low, and only under the condition of suitable temperature can it develop rapidly and healthily, so paying attention to the suitable temperature of rhododendron should be a key point in the cultivation and management of rhododendron. Cuckoos should be moved into rooms with a room temperature of not less than 5 ℃ between Frosts Descent. During the overwintering period, different varieties have different requirements for temperature, such as summer cuckoos not less than 5 ℃, spring cuckoos about 10 ℃, and western cuckoos about 8: 15 ℃. It should be noted that freezing injury will occur to different varieties when the temperature is less than 3 ℃.
2019-01-16 -
Cultivation and pest control techniques of rhododendron
Rhododendron, also known as rhododendron, sheep horn flower, rhododendron, rhododendron, rhododend There are single, semidouble, double, etc., the flesh is mostly red, there are bright red, pink, pink, red, purple, yellow and other colors. there are pure white, golden yellow, staring yellow, green lotus and other colors, or mixed with Banzhen, stripes and so on. There are more than 800 species of plants of the same genus, most of which are produced in China. They are traditional famous flowers in China, and they are one of the "top ten famous flowers" in China.
2019-01-16 -
Cultivation techniques of Rhododendron
Rhododendron is one of the ten famous flowers, which has the laudatory name of "western beauty in flowers". It has many species, luxuriant flowers and luxuriant leaves, and is mainly distributed in the southwest provinces, which can be divided into four categories: rhododendron, eastern rhododendron, summer rhododendron and western rhododendron. The western cuckoo is the most beautiful flower among the cultivated types. In recent years, with the rise of the flower industry, rhododendron has also been widely cultivated in the north. Its cultivation techniques are introduced as follows: first, propagation techniques: cutting propagation and tender branch propagation. Cutting propagation is the most widely used propagation method in rhododendron cultivation.
2019-01-16 -
What are the common pests of azaleas? How to prevent and cure?
Common pests of azaleas are red spiders, military insects, aphids, short beard cochlea and so on. Red spiders are small in size, but they do serious harm to azaleas. Cuckoos raised in high-rise buildings are most prone to this kind of pest. The method of prevention and control is to hunt and kill manually. Medicine can be used to kill insects with 5 degrees of stone sulfur mixture, or you can use walnut leaves, Yangzhu peach leaves, green poles and other parts to soak out the juice, dilute it with water and sprinkle it with ll, and it is also a good way to spray and kill with 1000 dichlorvos solution. The adult body of the military worm is small and flat, about 4 mm long, black and evergreen.
2019-01-16