Planting Technology Lists
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Growing environment of oleander
Sex likes sunny, warm and humid environmental conditions. More cold-resistant, slightly shade-resistant, slightly alkali-resistant, drought and barren, avoid stagnant water, and have a certain resistance to toxic gases such as smoke and dust and sulfur dioxide. It is suitable for growing in slightly acidic to slightly alkaline soil with fertile, loose and well drained water. The light and temperature of potted bamboo should be kept in the room for overwintering, keep at room temperature more than 5 ℃, and put in the place where the window is fully illuminated by sunlight. It generally moves into the greenhouse around October 20 and out of the greenhouse around April 20. After leaving the room, you should first put it in the leeward and sunny place, gradually
2019-01-16 -
Introduction of oleander varieties
1. Phyllostachys pubescens is a cultivated variety of oleander. Flowers white, semidouble. The leaves are small, and the branches and stems are bluish white. 2. Variegated oleander is a cultivated variety of oleander. Red, single. There are markings on the leaves. 3. Light yellow oleander is a cultivated variety of oleander. Flowers yellowish, single. 4. Double oleander is a cultivated variety of oleander. Red, double.
2019-01-16 -
Key points for pot conservation of oleander
Oleander alias willow peach, half a year red, for oleander, oleander is an evergreen large shrub, potted often trimmed into a small Qiaomu, plant height of 2 meters to 3 meters. The stem is erect and smooth, the old branch is grayish brown, the tender branch is green, the branching force is strong, and most of them grow in the form of trichross. Leaves lanceolate, 3-whorled, thickly leathery, short stalked, 10 cm to 25 cm long, apex acute, base cuneate, surface dark green, abaxially light green, midvein obvious, entire, petiole and peduncle purplish red, with a small amount of milk in branches and leaves
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Mosaic stone, a genus of oleander family
Morphological characteristics: evergreen woody vines, stems with inconspicuous lenticels. Branchlets, young petioles and leaves abaxially pubescent, old branches and leaves glabrous. Leaves leathery, elliptic to ovate-elliptic or broadly Obovate, 2-6cm long and 1-3cm wide. The old leaves are nearly green or light green, the first round of new leaves are pink, a few have 2-3 pairs of pink leaves, the second to the third are pure white leaves, and there are several pairs of variegated leaves between pure white leaves and old green leaves. Biological characteristics: light-loving and strong tolerance of the genus Alternaria
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Apocynaceae
Latin name: Apocynaceae English name: DogbaneFamily introduction: trees, shrubs or vines, sparse perennial herbs; with lotion or water. Leaves opposite, whorled, sparsely alternate, entire, rare denticulate, pinnately pinnate; stipules absent or reduced into glands, rare pseudostipules. Flowers bisexual, actinomorphic; solitary or in Cymes. Calyx basally connate, (4) 5-lobed, lobes often arranged in double imbricate shape, inner base often with glands; Corolla connate, lobes (4) 5, covered.
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Value and use of oleander
Oleander plant shape is round, leaves such as bamboo like willow, flowers like peach non-peach, beautiful flowers, evergreen four seasons, quite ornamental value. "the cloth leaves are suspicious of bamboo, and the flowers are as tender as peaches; savages never get tired of seeing them, when it comes to tree mash." Thus it can be seen from the ancient poems that oleander has been a popular ornamental flower since ancient times. Oleander has been cultivated in nearly 90 countries and is regarded as a fast-growing tree species because of its fast growth. Algeria also designated it as the national flower. Oleander stems and leaves contain oleander cardiotonic glycosides, which can extract cardiotonic agents, such as diuresis, analgesia, expectorant and asthma.
2019-01-16 -
Control of black spot of oleander
The symptom spot occurs at the edge or middle of the leaf, semicircular or round. When several disease spots are connected, they are corrugated, both positive and negative, and the front is darker than the back, and the disease spot is grayish white or grayish brown; in the later stage, a black powdery mildew layer is produced in the disease spot, which usually occurs on the overwintering leaves. The pathogen is fungus, Alternariasp. The conidia are olive-colored, oval, longitudinally and horizontally separated, chain-shaped, and borne on longer conidiophores. The general law of the disease is the old leaf and the lower part.
2019-01-16 -
Oleander black spot
Symptoms: the disease spot occurs at the edge or middle of the leaf, showing a semicircle or circle, when several disease spots are connected to form a ripple, both sides have, the front is slightly darker than the back, and the disease spot is grayish white or grayish brown. In the later stage, there is a black powdery mildew layer in the disease, which usually occurs on the old leaves. Pathogen and disease status: the pathogen is a fungus of Alternaria (Alternariasp.). The spores are transmitted by wind and rain. Too much Rain Water is easy to cause the disease, and the disease is common on the old leaves, lower leaves and tillering branches germinated in the roots. Prevention and control measures: 1. Strengthen
2019-01-16 -
Oleander management
Oleander, also known as half a year red, willow peach, originated in Iran and India. Because it is evergreen without deciduous leaves, double flower fragrance, red, yellow and white, easy to breed, simple to manage, long florescence and generous crown, it is loved by people. Both the south and the north of our country can be cultivated, potted and planted on the ground. They are often planted in courtyards and flower beds, as well as Jizhi. But the management of oleander must pay attention to three points: it must be pruned at the right time. The top branch of oleander has the characteristic of one-third, which can be trimmed and shaped according to the need. Such as
2019-01-16 -
Oleander has an ingenious way to control rose powdery mildew
In spring, rose is easy to suffer from powdery mildew, and a layer of powdery mildew appears on the leaf surface after the disease, which seriously affects the normal growth and development of the plant. Oleander has a good effect on the control of rose powdery mildew. The specific methods are: 1. Mash the fresh leaves of oleander, soak them in clear water for 2 days to prevent fermentation or deterioration, then filter the broken leaves with gauze and spray the remaining water on the diseased part of rose for 3 consecutive days, the effect is better. Diseased branches and leaves can also be directly soaked in oleander leaves.
2019-01-16