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Detailed Explanation of the Method for Sprouting and Raising Black Locust Seedlings from Root Segments
Black locust (Robinia pseudoacacia) is tolerant of drought and poor soil and grows quickly, making it a good tree species for rural landscaping around homes and for block planting. If the root-segment sprouting method is used for raising seedlings, it is not only low in cost and simple to carry out, but the seedlings are also of good quality. 1. Site selection and bed preparation Choose a nursery site that is sheltered from the wind, faces the sun, has level ground and good drainage as the hotbed. Before making the beds, apply 1000 kg of organic fertilizer per mu, and 50 kg each of ammonium bicarbonate and superphosphate; after plowing and harrowing level, scatter a 100:1 bait of bran and methamidophos on the bed surface to prevent damage from underground pests such as mole crickets. The beds should run north-south, 1.5 m wide and about 12
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What are the occurrence patterns of the black locust moth?
Occurrence patterns of the black locust moth: In Shandong it has 2 generations a year, overwintering as second-generation larvae of various instars inside thin silken cocoons in tunnels in the trunk. In late March of the following year they become active and feed and cause damage, and mid-May is the peak period of adult emergence. Eggs are mostly laid in wounds on branches and trunks or in bark crevices, and first-generation larvae begin hatching in mid-June. Newly hatched larvae are active and agile, burrowing under the bark and feeding on the phloem and cork cambium layers, forming vertical, irregular tunnels. The damaged areas proliferate and swell, and the bark splits and curls. In mid-July mature larvae begin to pupate, adults can be seen in late July, mid-August is the peak period of adult emergence, and
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What are the characteristics and control methods of the black locust moth?
The black locust moth is commonly known as the black locust bark borer. It mainly damages black locust (Robinia pseudoacacia). Its larvae bore into and feed on the bark of the trunk; the affected areas develop hyperplastic swelling, the bark splits and cracks, the tissue beneath the bark becomes filled with rotting matter, and the bark crevices are strung together with frass; this can weaken the tree and even kill the whole plant. Adult: female moth body length 7-10 mm, wingspan 17-22 mm, male moth slightly smaller; body grayish white or dark brown, thorax and wing base plates grayish white; forewings grayish white mixed with grayish brown or dark brown scales, with an upright tuft of dark brown scales at the wing base, and 2 oblique rows of scale tufts on the wing surface
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Symptom Identification and Control Methods of Black Locust Mosaic Virus Disease
[Distribution and Damage] Quite common in Beijing and Shandong. It affects the growth of young trees, causing dwarfism. [Symptoms] Irregular line patterns appear on the leaf surface, distributed without fixed positions, with beautiful patterns. Some leaves become smaller and lighter in color. If not carefully observed, it is easily overlooked. When adventitious buds in the leaf axils sprout, weak branches and small clustered branches and leaves are produced. In Eastern Europe, Central Europe or the United States, leaves become smaller, veins become transparent, petioles are short, plants are prone to cold damage, and there are often multiple branches and yellowing. The mosaic occurring in the United Kingdom appears mottled, with twisted leaves and curved wood.
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Occurrence patterns and control methods of black locust canker disease
Black locust canker disease is a major trunk and branch disease of black locust (Robinia pseudoacacia), affecting both young and mature trees. The disease mostly occurs in the bark of the main trunk. After trees are affected, lesions of varying sizes mostly appear on the lower part of the main trunk and at branch forks, and the lesions are spindle-shaped, oval or irregular. On young trees, the diseased part of the main trunk is cankerous and slightly sunken; on large trees, the bark of the main trunk is thick, and the diseased part is water-soaked with no obvious sunken areas. The disease spreads faster lengthwise than crosswise. When the diseased area encircles the trunk completely, the tree withers and dies. In the later stage, at the lenticels and bark cracks of the diseased part
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Why do spider plant leaf tips turn brown and black?
Why do the leaf tips of potted spider plants (Chlorophytum comosum) turn black, dry up and shrivel? How can this be prevented? When potted spider plants show withered, blackened leaf tips, from a cultivation standpoint there may be the following causes. First, dry air, overly intense sunlight and excessively high temperatures. This situation mainly occurs in summer and autumn, because spider plants like to grow in humid, semi-shaded environments; once the air is too dry, the sunlight is unobstructed, and on top of that the temperature rises above 30°C, it is very easy to cause the leaf
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Processing Methods for Black Pepper
Black pepper is made by drying the fruit spikes directly in the sun or by artificial heat. After the fruit spikes have been sun-dried for 3-4 days and the skins have shriveled, they can be trodden with the feet or beaten with a wooden club to separate the berries from the stalks. After the stalks are removed and the berries are thoroughly dried again, they become commercial black pepper. Fresh berries can also be dried in an artificially heated drying room, with the temperature controlled between 49-60°C, for 24 hours. 50 kg of fresh berries can be made into 16-18 kg of black pepper. Black pepper is generally made from ripe berries, but berries that are not yet fully ripe can also be processed. Black pepper requires full
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Introduction to the Characteristics and Cultivation Key Points of the Japanese Black Sweet Potato Variety
The Japanese black sweet potato is a rare sweet potato variety introduced into China from Japan in recent years. It is a dual-purpose variety grown for both stem tips and tuberous roots, and its nutritional content is 30%-50% higher than that of traditional Chinese varieties. It is called black sweet potato because of its purple-black skin and purplish-red flesh. This variety has many branches at the base, with vines about one meter long. The leaves are purple-green, relatively large and thick, heart-shaped, with deep purple veins and relatively long petioles. Tuber set is concentrated, and the tubers are spindle-shaped with long tips and uniform in size. The skin is purple-black, and the flesh is purplish-red. When cooked, it is tender, smooth, and refreshing, with a delicate fragrance and excellent taste. Generally, each plant sets
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How to grow blackberry lily (Belamcanda chinensis)? These precautions should be understood in advance
Precautions for growing blackberry lily
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A Detailed Explanation of the Picking and Processing Techniques of Keemun Black Tea
The picking and processing craft of Keemun black tea is fine and meticulous. The buds and leaves of one bud with two or three leaves are picked as raw material. After withering, rolling and fermentation, the buds and leaves change from green to purplish copper red, and the aroma is released, after which they are baked over a gentle fire until dry. After the rough black tea is made, it must still undergo refining. The refining process is complex and labor-intensive, and the finished tea is made through rough sifting, shaking sifting, grading sifting, tight-gate sifting, brushing sifting, cutting, air selection, picking and sorting, supplementary firing, clean wind selection, blending and packing. The high-grade Keemun black tea has a tight, fine and slender appearance, a dark glossy color, and after brewing the tea liquor is red and thick, with a fresh, fragrant and richly aromatic scent.
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