Breeding azaleas?
The technique of propagation of rhododendron: mainly by cutting propagation. For the selection of cuttings, take the rigid lignified branches of the year, break off with heel, cut off the lower leaves, leaving the top 4 to 5 leaves, cutting time: rhododendron in late May to early June, rhododendron in early June to mid-June.
Cutting method: family multi-purpose pot cutting, medium with river sand, perlite. Insert the cuttings into 1/3 or 1/2 during operation, spray them with a fine-hole pot and place them under the shade. Management: within 1 month after insertion, focus on shading and water spraying. Keep the cuttings fresh all the time. Increase foliar spray in high temperature season, pay attention to ventilation and cooling.
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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%.
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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.
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