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How to release seedlings after mulching cotton fields with plastic film? Practical tips to share
In plastic-film-mulched cotton fields, the temperature is high, and seedlings emerge quickly and evenly. It takes 8 days from sowing to emergence, and 3 to 4 days after emergence for full stand. After full stand, if the late frost has passed, holes should be broken to release the seedlings. Releasing seedlings too early means they cannot achieve full stand or complete stand; too late is not good for strong seedlings, and if high temperatures occur, it often causes seedling scorching. For drill sowing, holes should be punched according to plant spacing to release seedlings; for hole sowing, holes should be punched according to seedlings. After breaking the film and releasing seedlings, cover the openings with soil to prevent moisture loss, temperature drop, film lifting by strong wind, and weed growth. When releasing seedlings, grasp the principle of releasing green but not yellow, that is, cotton seedlings with flat and expanded cotyledons can be released; yellow-valve seedlings that have not expanded, if released, are easily dried by wind or killed by sun, and cannot be released through holes.
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What are the control methods for cotton red leaf disease?
Cotton red leaf disease is a physiological disorder that has a relatively large impact on cotton yield and quality. This disease usually begins to occur at the early flowering stage. If control is not timely, by the full flowering stage to the boll-setting stage the affected area expands and the condition worsens. When the disease first appears, the leaves take on a dark green color, then gradually thicken and wrinkle, becoming brittle, with yellow spots appearing between the veins while the veins remain green. As the disease worsens, the leaf edges begin to curl downward and turn from yellow to purplish red, withering and dropping off, until the cotton plant is left as bare stalks and dies. The main causes of cotton red leaf disease
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How to manage cotton during the dog days? Please check this guidance
According to the citywide "715" survey summary, this year our city's cotton growth progress is fast and the cotton is growing well. This is shown by: fast growth progress, uneven growth, and a large area of cotton entering the dog days with bolls. The citywide average cotton plant height is 88.38 cm, an increase of 2.01 cm over last year; the total number of fruiting nodes is 49.80, an increase of 7.77 over last year; the number of abscised squares and bolls is 4.39, a decrease of 0.15 over last year; the abscission rate is 8.8%, a decrease of 1.99 percentage points over last year. The area entering the dog days with bolls accounts for 10 of the cotton field area
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Basic copper sulfate can be used to control cotton diseases
Copper Gaoshang 27.12% basic copper sulfate suspension concentrate can be used to control multiple cotton diseases. For seedling-stage application, after cotton is sown and covered with soil, drench with Copper Gaoshang 27.12% basic copper sulfate suspension concentrate at 600-800 times dilution to disinfect the seedbed soil, which can effectively prevent soil-borne diseases. When the cotton seedlings have all emerged and the cotyledons are flat and spread out, spray with Copper Gaoshang 27.12% basic copper sulfate suspension concentrate at 1000 times dilution, which can effectively control seedling-stage diseases such as cotton damping-off and anthracnose. 3-5 days before transplanting the cotton seedlings, use Copper Gaoshang
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What are the common control methods for diseases of Schisandra chinensis?
Schisandra chinensis fruit rot and its control: Small brown or black spots appear on the fruit surface, which later turn black. Control method: use a 50% amobam 500-600 times dilution, spraying once every 10 days, for 3-4 consecutive sprays. Schisandra chinensis root rot and its control: It mostly occurs from early May to early August. After onset, the root and the soil contact area rot, the root bark falls off, and the plant dies within a few days. Control method: drench the roots with 1:1:100 Bordeaux mixture. Schisandra chinensis leaf blight and its control: It mostly occurs
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What are the common diseases in Schisandra chinensis cultivation?
The common diseases in Schisandra chinensis cultivation are root rot, leaf blight, powdery mildew, etc. When using pesticides for disease control, you must select pesticide varieties that are formally registered by the Pesticide Inspection Institute of the Ministry of Agriculture and permitted for use by the state, in order to prevent the adverse effects of pesticide phytotoxicity on the growth of Schisandra chinensis and the residual hazards of highly toxic pesticides. 1. Root rot Symptoms: This disease generally occurs from May to August. At the beginning of the disease, the epidermis at the junction of the root and the ground turns black, and further the cortex rots and falls off, forming a ring shape, the leaves wilt, and the whole plant dies after a few days. Causes: Causes
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Symptoms and Control Methods of Smut Disease in the Medicinal Plant Sagittaria
Sagittaria, scientific name Sagittaria trifolia L., commonly known as arrowhead, belongs to the family Alismataceae. The whole plant and corms are used as medicine. It has the effects of clearing heat and stopping bleeding, detoxifying and reducing swelling, and dissipating nodules. It is also a vegetable for autumn and winter. It is mostly planted in rice fields after the rice harvest. It is distributed in all provinces and regions of northern and southern China. Symptoms mainly damage leaves, petioles, flowers and corms. On the leaves, yellow to orange-yellow, slightly raised blister spots of varying sizes first appear, and later the blister spots wither and yellow and rupture, releasing small black powder particles, which are the spore masses of the pathogen. Some diseased leaves are deformed and twisted. Leaf
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Methods and Technical Key Points for Pest and Disease Control in Glossy Privet (Ligustrum lucidum)
(1) Diseases. The main diseases harming glossy privet are rust disease, brown spot disease, etc. Rust disease: This disease mainly harms the leaves. In the early stage, orange-red spots appear on the leaf surface, and later brown spores appear on the underside of the leaves. Control methods: The growing medium should be disinfected in advance, environmental management should be strengthened, ventilation and light transmission should be maintained, and diseased leaves should be removed when necessary; in the early stage of disease onset in flowering plants, spray with 0.2-0.3 degrees Baume lime sulfur mixture, or 70% mancozeb wettable powder at 500 times dilution, or 70% thiophanate-methyl at 1000 times dilution, or
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Privet leaves, privet bark and tree-of-heaven bark can treat livestock diseases
Privet leaves and bark. Take an appropriate amount of the dried product, decoct it into a paste, and apply it to the affected area; it can treat sores, swellings, burns from fire or scalding by boiling water in livestock. Tree-of-heaven bark. Take 150 g of tree-of-heaven bark (with the coarse outer bark removed), together with 30 g each of costus root and chebula fruit, decoct the juice and administer it by drenching; it can treat chronic diarrhea in livestock; grind tree-of-heaven bark into powder, add flour and feed it; it can treat bloody dysentery in livestock.
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How to prevent and control leaf spot disease in Chinese privet (Ligustrum quihoui)?
Ligustrum quihoui, a plant of the genus Ligustrum in the family Oleaceae, is an excellent colored shrub that has been widely planted in recent years. However, as the planting area has expanded and the planting years have increased, some of its shortcomings have gradually emerged. Especially with old seedlings, during the rainy season every year, leaf drop of varying degrees occurs, and it happens year after year, seriously affecting the landscape effect. According to observation, the cause of this condition is golden privet leaf spot disease. Through preliminary observation and research, the pathogen of Ligustrum quihoui leaf spot disease belongs to the subphylum Deuteromycotina fungi. Round
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