Planting Technology Lists
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Main diseases and insect pests of banyan bonsai
First, soot disease. Soot disease often occurs with aphids and scale insects under the condition of high temperature and humidity. The control measures are as follows: (1) to create ventilation and light transmission conditions for plants; (2) to reduce air humidity; (3) to scrub disease spots with a brush dipped in water; (4) to eliminate aphids and shell insects in time; and (5) to protect by spraying. Spray 120 ℃ 160 times Bordeaux solution or 70% methyl thiophanate 700 times 800 times solution, or 50% carbendazim wet powder 500 times 80 every 10 to 14 days from June to August.
2019-01-16 -
Prevention and control of diseases and insect pests of tree stump bonsai
There are diseases in the branches, such as phloem, cambium decay, stem rot and ulcers on the branches, surface decay of the branches, dry core decay, spots on the branches, and so on. Bordeaux solution should usually be sprayed, Xu with stone-sulfur mixture, and scraped off the rotten parts. Foliar diseases: foliar diseases usually appear yellow-brown or black spots, leaf curl, wilt, early defoliation and other symptoms, which may be yellowing, leaf spot, soot, powdery mildew and so on. Leaf spot can be removed from diseased leaves and Bordeaux solution can be sprayed; chlorosis can be used with 0.1-0.
2019-01-16 -
Pest Control of Cymbidium (1)
The pests that harm Cymbidium include shell insects, aphids, leaf mites, thrips, whitefly, leaf miner, snails and slugs, nematodes, caterpillars, cockroaches, ants and so on. 1. The scale insect is one of the most common pests that harm Cymbidium. There are many kinds of them, which are mainly parasitic on the stems and leaves of Cymbidium, and can also be found on the membranous sheaths at the base of petioles and pseudobulbs. They feed on piercing mouthparts sucking plant juice. When the damage is mild, the organ turns yellow and aging, affecting the growth of orchid plants, and the heavy ones cover the leaves, which not only consumes nutrients, but also affects orchids.
2019-01-16 -
Pest Control of Cymbidium (2)
5. Whitefly whitefly is a pest of Homoptera whitefly family, which is small and has white powdery wax all over the body. It is usually clustered on the orchid plant and is easy to occur in the orchid shed with poor ventilation. It often harms the new buds, tender leaves and flower buds of orchids, which is inserted from the back of the leaves with a prick aspirator to absorb the sap from the plant tissue, making the leaves withered and yellow, and often excrete a large amount of honeydew in the wound, resulting in coal pollution and brown rot, even causing the death of the whole plant. Because of its strong fecundity, whitefly can reproduce 9 to 10 generations in a greenhouse in a year, and can form a large population in a short time.
2019-01-16 -
Breeding and Pest Control of Magnolia Magnolia
1. Morphological characteristics: leaf trees, about 25m high. Leaves alternate, larger, broadly Obovate to Obovate, entire. Flowers solitary, apical, white bell-shaped, fragrant. The florescence varies from November to December in Kunming, February to March in Guangzhou and March in Hangzhou. The cultivated species have numerous dwarf branches and large and dense flowers. The seedling has straight plant height, sparse branches, sparse flowers and luxuriant leaves, but it has strong adaptability and rapid growth. Propagation by sowing, grafting, striping and cutting. Growth habits: warm and humid, shaded on the side, slightly shady, while adult trees prefer light in acid or slightly.
2019-01-16 -
Cultivation of Plum Bonsai
Plums are deeply loved by people for their colorful shape and fragrant fruit. Plum bonsai is very popular because it can watch both flowers and fruits. For the selection of rootstocks and varieties, dwarf rootstocks are selected, which have strong affinity with the grafted varieties, and the varieties with bright fruit color, high yield and weak growth potential should be selected. The variety of plum is very rich, and the traditional fine varieties in China are "madam plum, Jiaqing plum, carrying plum, Hongxiang plum, Yuhuang plum, mi plum, May plum" and so on. Domestic products popularized and applied in production at present
2019-01-16 -
Magnolia mandshurica
Magnolia is a smooth-skinned papaya. The fruit is long oval, with a few edges. The pericarp is yellowish green during the growing period, yellow after ripening, thick, smooth, waxy and with more fruit powder. The flesh is yellow and white, with more juice, high juice yield and strong fragrance. The weight of single fruit is 500g to 1000g, and the maximum is 2100g. The fruit ripens from late September to early October and can be stored until February to March of the following year. The tree has moderate potential, semi-open posture, high germination rate, strong branching ability, long life of latent buds and axillary flower buds.
2019-01-16 -
Yellowing disease of Magnolia
Chlorosis, also known as chlorosis, is a common disease of Magnolia, especially in areas with alkaline soil. The disease is more serious in this area of our country. The disease of the symptomatic plant begins with the young leaves at the top of the tip. The mesophyll tissue of the diseased leaf turns yellow or light yellow, while the leaf vein remains green. With the development of the disease, the whole leaf becomes yellow to yellowish white, and the leaf margin becomes grayish brown or brown and necrotic. The disease became more and more serious, the growth of the plant weakened and eventually died. The cause of yellowing of Magnolia is not
2019-01-16 -
Control measures of anthracnose and yellowing in Magnolia
Symptoms of anthrax: dark brown round or nearly round spots are produced on the leaves, and the edges are slightly deep. after expansion, the center gradually becomes grayish white, with a size of 2-8 cm. In the later stage, there are small black spots on the disease spots, that is, the conidium disk of the pathogen. When the humidity is high, the disease spot is overflowing with yellow slime, that is, the conidia of the bacteria. The disease is serious in rainy and wet weather. Prevention and treatment methods: at the initial stage of the disease, Bordeaux solution sprayed with 100 times of Bordeaux or 25% of Juling 500 times or 70% anthrax 600 times of anthrax to the United States. Etiolation
2019-01-16 -
Effective prevention and control of rhododendron chlorosis
Rhododendron chlorosis is a physiological disease, but the reasons for the formation of chlorosis are complex, such as prevention and treatment, often futile, so we must carefully observe, determine the condition, find out the cause, and then prescribe the right medicine to be effective. The various symptoms, causes and effective prevention and treatment measures of rhododendron chlorosis are described as follows: first, iron deficiency. 1. Soil iron deficiency: the formation of chlorophyll requires elements such as iron and nitrogen, and the phenomenon of chlorosis caused by soil iron deficiency often occurs, so it is very important to supplement iron in the soil. Sulfuric acid can be used.
2019-01-16