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What damage does tea blister blight cause to the growth of tea plants
Tea blister blight, also known as blister-like leaf blight and leaf gall disease, is an important disease of young buds and leaves. It is distributed in all tea-growing regions across the country and mainly damages tender leaves, tender stems, new shoots, flower buds, fruits and leaf stalks. When tender leaves are infected, small translucent spots appear at first, pale yellow to reddish brown, then expand into round spots with a diameter of 0.3-1.25 cm. The front of the lesion is sunken, pale yellowish brown to dark red, and the back is raised, forming steamed-bun-shaped blister spots, on which there is grayish white, pink or gray powdery material. Later the powder disappears, and the raised part shrinks to form brown dead spots, with a
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Why does Gastrodia elata rot completely after maturing?
Li Zongguo, a farmer from Jinluan Mountain Village, Jiahe Town, Yunxi County, wrote in to ask: I started learning to grow Gastrodia elata last year. Based on the relevant information, I planted fifty or sixty sq m indoors, and last year's harvest was good. This year I began to expand the planting, still following last year's methods. By September this year, I started digging, and sold at the market for only three days. Afterward I went to dig again, and found that all the Gastrodia elata had completely rotted. What is going on? Zhang Qiudong of the Pest and Disease Control Section, Provincial Plant Protection Station, answers: The cause is mostly a poor environment, such as high temperature, high humidity, poor aeration and other unfavorable
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What effect does low winter temperature have on Gastrodia elata
The tubers of Gastrodia elata are buried underground and overwinter in a dormant state; the stable low temperature they can tolerate is 0-5°C. However, if winter temperatures fluctuate frequently, with large swings in temperature difference, sudden warmth followed by sudden cold, Gastrodia elata is prone to cold damage. Therefore, special attention should be paid to cold protection and heat preservation for overwintering Gastrodia elata, especially for box-cultivated Gastrodia elata, which should be covered even more carefully to preserve warmth and prevent cold damage. But Gastrodia elata has a certain low-temperature cycle and requires an appropriate stable low temperature in winter, otherwise its sprouting will be adversely affected.
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How much does management level affect Gastrodia elata yield?
Strengthening management is an important measure for obtaining a high yield of Gastrodia elata. The main thing is to keep temperature and humidity under control. During the growth of Gastrodia elata, the temperature should be kept at 20-25°C and must not exceed 25°C. The optimum humidity for the growth of Gastrodia elata is 65% and must not exceed 70%. It is best to add some grain and vitamin B1 to the water used for watering, that is, to water with nutrient water. In addition, ventilation and shading are also needed. Various weeds and fungi as well as damage to Gastrodia elata from rats, mole crickets and the like must be prevented and controlled. In short, the requirement is to advocate "early" in planting Gastrodia elata, demand "good" in the fungus sticks, and keep temperature
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How much does the base growing medium affect Gastrodia elata yield?
At present, the base growing media used for cultivating Gastrodia elata vary from place to place. In the Hanzhong area of Shaanxi, river sand is mostly used as the base growing medium, while in the Tonghua area of Jilin, humus soil is mostly used as the base growing medium. Some also use broadleaf tree sawdust mixed with sand or rice husk mixed with sand as the base growing medium. The biggest advantage of sand as a growing medium is good water permeability, but it contains very few nutrients; choosing humus soil made of semi-decomposed fallen leaves as the growing medium is better, but the black soil from the lower layer must not be mixed in. Production practice has shown that sawdust mixed with sand, rice husk mixed with sand, and semi-decomposed
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What does the single-layer box cultivation method for Gastrodia elata mean?
First put a layer of growing medium on the bottom of the box, about 6 cm thick, place 5 high-quality fungus sticks at equal distances along the length of the box, and sprinkle growing medium between the fungus sticks so that the fungus sticks are half buried and half exposed. Do not plant Gastrodia elata in the gaps between the fungus sticks and the box boards; instead, plant 4 rows of Gastrodia elata in the gaps between the fungus sticks, or also plant Gastrodia elata between the fungus sticks and the box boards, in which case 6 rows can be planted. Place the seed tubers right beside the fungus sticks, close against them. In order to give Gastrodia elata a sufficient nutrient supply, add 5 to 6 fungus branches between the fungus sticks, then
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What does the double-layer box cultivation method for Gastrodia elata mean?
First place a 6 cm thick layer of soybean stalks or sesame stalks (they must be fresh stalks free of mold and rot) in the bottom of the box, level it with growing substrate, plant the first layer of Gastrodia tubers according to the single-layer planting method, and add 3 cm of growing substrate (half of the whole box). Then plant the second layer in the same way as the first layer, and fill with growing substrate until the box is full.
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What does asexual propagation of Gastrodia elata mean?
If the "parrot-beak"-like mixed bud of the arrow corm is removed, the arrow corm can no longer send up stems, bloom, or bear fruit. Using arrow corms with the mixed bud removed, as well as the tubers of white corms and rice corms, as seed for cultivation, and using Armillaria mellea fungus sticks, fungus branches, and basic culture substrate as the main nutrient source and supplementary nutrient source, the method of continuing to propagate offspring is called the asexual propagation method of Gastrodia elata. At present, asexual propagation is the main method of cultivating Gastrodia elata, including box cultivation, bed-frame cultivation, open-field cultivation, bottle cultivation, and plastic bag cultivation.
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What kind of growing environment does the garden balsam (Impatiens balsamina) like?
It prefers sunny, warm and humid environmental conditions; it is not cold-hardy, tolerates shade, and fears frost. It adapts well to soil and does not need very high fertility; it grows luxuriantly in moist, well-drained soil. It dislikes drought, otherwise it will wilt and cause leaves to drop. Light and temperature: it likes light and also tolerates shade, and needs to receive at least 4 hours of scattered sunlight every day. In summer, shade it to prevent excessively high temperatures and blazing sun exposure. The suitable growing temperature is 16-26°C, and during the flowering period the ambient temperature should be kept above 10°C. In winter it should be moved into a greenhouse to prevent freezing.
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What agricultural benefits does garlic extract have?
Garlic is rich in natural antibacterial substances, the main component of which is allicin. It has been reported that applying garlic extract to crop cultivation can not only control pests and diseases, but also help promote crop growth and development; when applied to plant tissue culture, it can effectively prevent tissue culture materials from contamination; when applied to the preservation and freshness-keeping of agricultural products, it is both reliable and safe. Its application methods and effects are introduced as follows: 1. Controlling crop pests and diseases. According to relevant domestic research, using 1%-3% garlic extract to treat peanut seeds by soaking
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