Planting Technology Lists
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Key points of cultivation and Management of Rhododendron
(1) upper basin and turning basin: yellow mud + rotten leaf soil is the main soil, mixed with a little river sand as culture soil to ensure that the soil is slightly acidic and avoid sticky weight. At the beginning of the basin, try to choose a small basin, gradually change the large basin; cuckoos do not need to turn the basin year after year, when the root system grows all over the basin, watering is not easy to seep out before considering turning the basin to change soil. (2) Cuttage propagation: the plum rainy season is the most suitable for cutting, when the new branches of rhododendron are semi-woody, and the suitable temperature and humidity are very beneficial to the rooting and survival of cuttings. Take the sturdy new branch about 5ml 7cm, remove the lower leaves, and retain 4 pieces of top leaves, which are based on mountain mud mixed with yellow sand.
2019-01-15 -
Rhododendron leaf swelling disease
Symptoms: rhododendron leaf swelling disease is also called cake disease. The young tissues of rhododendron can be damaged, mainly for flower buds, tender leaves and new shoots. The front of the leaf is a light yellow translucent round spot at first, then yellow, sunken; the back of the leaf is reddish, hypertrophic and swollen, followed by a gall tumor, and there is a thick gray-white powder layer on the surface of the gall tumor, such as biscuit-like, withered, yellow and early fallen leaves. In severe cases, the petiole disease is patchy and deformed and hypertrophy. When the tender shoot is sick, the top produces a fleshy lotus-shaped leaf, or a tumor-like leaf, and then shrinks into a sac. After the petals are infected, they are abnormally thick and show irregular galls.
2019-01-15 -
What if there are worms on the back of cuckoo leaves?
(1) red spider. The individual is very small, the body length is generally about 0.3 mm, it is difficult to see clearly with the naked eye, observation needs the help of a magnifying glass. Red body, often gathered on the back of the leaves, mainly absorb the sap of the plant, and make the leaves appear gray-white spots. In serious cases, the leaves turn yellow and fall off, the growth of new shoots is poor, and the tree potential is weakened. Red spiders produce 10 generations a year, and the harm is particularly serious in high temperature and drought from June to August, but less harmful in heavy rain and rainy weather. Litter should be removed in winter to eliminate overwintering adults.
2019-01-15 -
Why did the cuckoo lose its leaves?
There are about ten reasons why rhododendrons lose their leaves due to disease: ▲ hypertrophy, burning roots and dry tips. The ▲ floods the roots and leaves. ▲ overcooled or overheated water ▲ soil is alkaline and hardened. ▲ suffers from black spot disease with high humidity. ▲ red spider disease. There is a tumor at the edge of the lobe of ▲. ▲ leaves the room too early, too late, or poorly ventilated. ▲ is too dry. ▲ is damaged by paint or other toxic fumes.
2019-01-15 -
Rhododendron net bug
Cuckoo net bug, also known as cuckoo army with worms, smelly sister. The adult body is about 3.5 mm long, dark brown, the wings are covered with reticulate whiskers, the forewings are slightly rectangular, when still, and the dark brown markings on the wings form an "X" shape. The nymph is similar to an adult, but the body is tender and wingless, about 2 mm long, the egg is 0.6 mm long, oval, milky white, produced in the midrib and larger leaf veins, light green at first birth, and then yellowish. There are three to four generations a year, and adults overwinter in bark and land crevices in mid-late October, and in the second year.
2019-01-15 -
What is the cause of the cuckoo's death?
Cuckoo deaths are generally caused by the following reasons. The soil alkaline clayey rhododendron must have a PH value of 5.5 to 6.5. it is suitable to use the culture soil with strong water permeability and rich humus. The culture soil should be used only after insecticidal sterilization or high temperature disinfection. Clay permeability is poor, alkaline soil will cause small flowers, stems and leaves, branches and shoots dry up, and even death. Poor ventilation azaleas like cool, fresh air, poor ventilation is easy to form a high temperature, dry and hot environment, and prone to brown spot,
2019-01-15 -
Causes and Countermeasures of death or Bud shedding of Rhododendron
Rhododendron is one of the ten most famous traditional flowers in China with beautiful tree shape and colorful flowers. it is a common flower for landscaping, indoor potted plants and bonsai production. There are many reasons for the shedding or death of rhododendron buds, mainly as follows: rhododendron is suitable to grow in acidic sandy soil rich in humus, strong permeability and pH 5.0 to 6.5, and avoid alkaline soil and clayey soil. The planting land is alkaline or viscous and the air permeability is not strong, which can easily lead to poor plant growth, bud shedding and even death. Fertilization concentration
2019-01-15 -
The main points of rhododendron cultivation
Rhododendron is one of the top ten traditional flowers in China, which is rich in shape, colorful and beautiful. However, cuckoos have higher requirements on the growth environment. If they are not managed properly, their growth and flowering are often unsatisfactory, and even wither and die. Therefore, in the cultivation of rhododendron, we should pay attention to the following six points. First, soil. Rhododendron prefers acid soil with loose, strong ventilation, good drainage, pH between 5 and 6.5 and rich in humus. Mountain mud is the most suitable, and rotten leaf soil, pine needle soil, peat soil or rotten sawdust can also be used. Do not use alkaline soil or
2019-01-15 -
Closed cuttage propagation of rhododendron
First, the selection and construction of the slotting bed should be built in the place of leeward, shade and water. Covered with black shading net (60% to 70% shading rate), both sides of the shading net should be hung to the ground, so that the whole shed is in a cool environment. There is no small arch shed on the seedbed, and the center of the arch shed is 40 centimeters high. Cover with a layer of plastic film and then a layer of black shading net (60% to 70% shading rate). Second, lay the substrate in early May, mix rotten leaf soil and perlite (1 ∶ 1) evenly in the seedbed, the thickness should not be less than 30 cm. Put it
2019-01-15 -
Introduction of rhododendron species-- sheep hesitant
It belongs to the subgenus Rhododendron. Deciduous shrubs, 0.5-2 m tall. The branchlets are soft and thin. Pilose and bristles. The leaves are papery, light green, long elliptic-lanceolate, 5-12 cm long and 2-4.5 cm wide, apex obtuse, with a convex tip, base cuneate, margin ciliate, petiole, leaf surface, and leaf back all pilose. Terminal raceme umbels with 5-9 flowers, flowering in early May, about 10 days later than Yingshanhong, flowering first and then leaves or flowers and leaves together, Corolla broadly bell-shaped, caliber 5-6 cm, golden to orange
2019-01-15