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How to prevent and treat root rot in rhododendrons? These methods you need to master
Root rot is a serious threat to rhododendrons. Although its incidence rate is not high, the mortality rate after infection is very high, so the prevention and treatment of root rot must be taken seriously in the cultivation and management of rhododendrons. Root rot is a soil-borne disease caused by Fusarium fungi, mostly occurring at the root and stem parts of rhododendrons, because these parts are often moist with insufficient sunlight, and the Deuteromycetes Fusarium fungi are highly active there. Once they invade the cortex, rot soon follows, with water-soaked brown spots and soft rot appearing on the roots, followed by decay and peeling of the bark, the xylem turning dark brown
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Repotting rhododendrons after flowering has its particularities; only by mastering the method can they survive well
When choosing a pot, select a suitable pot according to the size of the plant, with clay pots being best; generally the pot diameter (inner diameter) should not exceed half the crown diameter. Rhododendrons prefer acidic soil, requiring a pH of 4.25-5.5; without maintaining this acidity, potted rhododendrons are very difficult to keep alive, and the potting soil must be loose, well-draining and rich in humus; never use heavy clay soil. When using soil, it is best to prepare it according to the original root-ball soil of the rhododendron; plants previously grown in pine-needle soil should still use pine-needle soil, which can be mixed with a small amount of decomposed horse manure and bone meal, and
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How is upland rice cultivated? These technical points need to be mastered
Upland rice cultivation should master the following points: (1) Select a suitable sowing period according to variety characteristics. Generally the same as the local early and middle rice. (2) Choose plots with deep soil plough layers and good water retention. Mountainous land with steep slopes, shallow plough layers and high coarse sand content is not suitable for planting upland rice. (3) Deep ploughing and fine preparation, with sufficient base fertilizer. Plough layer over 15cm, bed width about 1 m. Apply base fertilizer per mu by banding or hole application: phosphate fertilizer 50 kg, potassium fertilizer 10 kg, farmyard manure 500 kg. (4) Direct seeding or seedling raising and transplanting. Direct seeding can be drilled
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What are the three key factors for turtle egg incubation? Master the key points to improve the hatch rate
The key to turtle breeding is doing a good job of turtle egg incubation. No matter which incubation method is used, the three key factors of incubation temperature, humidity and ventilation must be well controlled. According to our farm's incubation experiments in recent years on the eggs of different turtle species such as the three-striped box turtle, alligator snapping turtle, yellow pond turtle and hawk turtle, as long as temperature, humidity and ventilation reach the optimal state, the hatch rate of turtle eggs can reach 93%-98%. 1. Incubation temperature The suitable temperature for turtle egg incubation should be controlled at 28°C-35°C, with about 30°C being best. It must not be too high or too
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How to care for a cow with a fever? These four measures you need to master
Drink more water After a sick cow develops a fever, its body consumes a lot of nutrients, its mouth is dry, and its appetite decreases, leading to anorexia. Therefore, the water supply should be met, otherwise the condition will worsen. It should drink more water to replenish body fluids and promote the excretion of intestinal toxins; adding an appropriate amount of sugar and salt to the drinking water is even better. Rest more The cowshed should be kept clean, hygienic and quiet, and the sick cow should be allowed to rest more to reduce the sick cow's muscle activity, thereby lowering physical consumption and heat production. Do not disturb the sick cow while it is sleeping; better deep sleep can significantly enhance the cow's immunity and improve resistance
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How to prevent cotton red leaf stem blight? These integrated measures must be mastered
Cotton red leaf stem blight is a physiological disease. In recent years, it has occurred in large amounts in the cotton region of the Yangtze River Basin in our area. It begins at the early flowering stage, and is more severe and widespread from the full flowering stage to the boll-setting stage. In our area specifically, it occurs sporadically in July and August. It reaches its peak from mid-to-late September to October. Lightly affected plants are yellow and thin, with few and small bolls, short fiber, and poor boll opening; severely affected plants die prematurely, and the bolls cannot mature, greatly affecting yield. 1. Disease symptoms. At the early stage of the disease, red and purple spots appear on the leaves, gradually spreading until the whole leaf turns red
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What to Do About Excessive Cotton Growth Regulator Application? Master These Mitigation Methods
Every year in late July and early August, many cotton farmers in cotton-growing areas report that some cotton plants showed excessive vigor in the earlier stage, and some even tended toward runaway growth, so they applied the plant growth regulator mepiquat chloride. Because they could not get the concentration right, when the spray concentration was too high and they encountered high-temperature weather, the cotton plants showed symptoms of leaves and branches being unable to spread out, and cotton growth was inhibited. Below are several methods to alleviate excessive cotton growth: Spray Huimanfeng active liquid fertilizer. This fertilizer contains chelated humates and multi-element compound fertilizer
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Cotton chemical regulation has its finer points: master these technical essentials
In recent years, with the widespread popularization and application of insect-resistant cotton, plastic film mulching and chemical regulation technology, cotton farmers have shown some undesirable cultivation tendencies in cotton cultivation techniques, especially in chemical regulation technology (hereinafter referred to as chemical regulation). Failure to pay attention to timely and appropriately timed chemical regulation leads to excessive vegetative growth and rank growth in cotton fields, over-vigorous vegetative growth, and relatively serious shedding of squares, flowers and bolls, ultimately causing cotton plants to become tall, large and empty, with severe lodging when hit by wind and rain later on, resulting in relatively large losses. During chemical regulation, the goal should be to steadily build a high-yielding framework and increase squares and preserve bolls, mastering the
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How to grow licorice seedlings? Master these key seedling cultivation techniques
Choose sandy soil and loam with a low groundwater table and deep soil layer, but it must be irrigated land. When the ground surface temperature reaches 15°C, apply 3000 kg of farmyard manure per mu, plus 40 kg of American diammonium or nitrophosphate, then deep plow 40-50 cm. Deep plowing is essential (otherwise the seedlings grown will have short roots and many branches, mostly failing to meet the specified quality standards). Make a flat seedbed and water once, with the amount of water bringing the soil to the black moisture state (that is, when you grab a handful and throw it down, it does not crumble but holds together like a cake). After three to five days, shallow plow once more, then you can open furrows and sow. Follow the drilling method for seedling cultivation, with a row spacing of 2
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Clever inoculation of shiitake mushrooms: master the method to achieve high yields
1. Dense inoculation increases the spawn points on the log segments. More spawn points means a larger area of spawn growth, allowing the mycelium to penetrate deep into the log segments and feed within a shorter time, reducing the chance of contamination by competitor fungi. 2. Deep inoculation: deeper spawn holes hold more spawn, which helps enhance drought resistance and reduces the stimulation of external temperature differences on the spawn blocks at the bottom of the holes. Under constant temperature and humidity, the mycelium inside the spawn blocks germinates quickly, and the survival rate improves. Drilling deeper holes increases the tangential depth of the wood, greatly raising the yield. 3. Early inoculation: under low-temperature conditions, the density and activity of competitor fungi in the air are low,
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