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An Introduction to the Characteristics and Living Habits of the Black-browed Ratsnake
Black-browed Ratsnake: a large snake with a total body length of up to 2000 mm. The head and upper body are yellow-green or brownish-gray, with a distinct black stripe behind the eye; the anterior and middle sections of the body bear black ladder-like or butterfly-like markings that gradually fade toward the rear. From the mid-body backward, distinct black longitudinal bands run along both sides to the tip of the tail. Distribution: widely distributed, found in Tianjin, Shanghai, Shanxi, Zhejiang, Jiangsu, Anhui, Fujian, Taiwan, China, Jiangxi, Hubei, Hunan, Hainan, Guangxi, Chongqing, Sichuan, Guizhou, Yunnan, Tibet, Gansu, and other places. In the Beijing area
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How to control the citrus black scale in orange orchards? The pure yellow aphelinid wasp comes to the rescue
[Morphological characteristics] Female wasp body length 0.92-1.18 mm, yellow, without color spots. The posterior margin of the scutellum has dark brown stripes. The base of the forewing has short black stripes; the ventral side of the antennal scape is dark brown, and the remaining segments are deep fuscous. Legs yellow. Compound eyes with fine hairs. Thoracic hairs thick and black; the scutellum bears 4 hairs; the forewing is 2.25 times as long as wide; the ovipositor is 1.9-2.01 times the length of the middle tibia. Male wasp body length 0.71-0.92 mm; the forewing is wider than that of the female, 2.2-2.33 times as long as wide. Important differences from Aphytis chrysomphali: the pure yellow aphelinid wasp of the citrus black scale is a bisexual species, and the propodeum is shorter, 0.75-0.8 times the length of the scutellum. The fan-shaped projections are large and elongated. Strongly overlapping; the thorax and venter of the mature pupa are dark brown, with only the abdominal tip lighter in color. Aphytis chrysomphali is a unisexual species, with males rarely seen in nature; the propodeum is longer, equal to or slightly longer than the scutellum. The posterior margin is broadly arched; the fan-shaped projections are small, rounded, and not overlapping. The mature pupa is yellow, with only a single black longitudinal line on the mesothoracic ventrite.
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Detailed Explanation of Key Techniques for High-Yield and High-Quality Cultivation of Black Rice
Black rice is an ancient and precious rice variety in China. It is rich in nutrients and has the functions of nourishing yin and replenishing blood, darkening hair and preventing aging. It has always been eaten as a tonic, and among the people it has the fine names of blood-nourishing glutinous rice, bone-setting glutinous rice, medicinal rice, longevity rice and monthly rice (eaten by women during confinement). Black rice is mainly distributed in Yunnan, Guizhou, Guangdong, Guangxi, Hunan and Shaanxi provinces. In the long course of cultivation, many precious farmer varieties have been formed, such as Yunnan Jinggu purple rice, Guizhou Huishui black rice, Guangxi Donglan ink rice and Hunan southwestern Hunan black glutinous rice. However, these varieties generally have tall plants, loose plant type, drooping leaves,
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Characteristics of the Japanese Black Sweet Potato Variety and Its Cultivation and Management Methods
This variety was developed by crossing Japanese Chuanshanzi with Yushu Wang. The vines grow to about 1.5 m long, and the tubers are spindle-shaped with red skin. The flesh is red-purple with white streaks and turns bright red when cooked. It tastes fragrant, soft and sweet, with an excellent mouthfeel, making it a good variety for eating and processing. The yield is 3000-5000 kg per mu, with 3000-3500 plants planted per mu.
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The Putian Black Duck is a typical egg-type duck breed.
(1) Origin and distribution: It is the only black-feathered breed among the egg-type breeds in China. It is named after its central production area in Putian, Fujian Province. It is mainly distributed in Pingtan, Fuqing, Changle, Lianjiang, the suburbs of Fuzhou, Hui'an, Jinjiang, Quanzhou and other counties and cities. This breed is an egg-type duck developed under beach grazing conditions; it adapts both to grazing on soft tidal flats and to grazing on hard beaches, and has relatively strong heat tolerance and salt tolerance, making it especially suitable for rearing on hard tidal flats in subtropical regions.
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Detailed explanation of black tea processing technology, master the key process steps
Black tea is divided into two types: domestic sales and export sales. Before 1966, all export black tea in Zhejiang was processed as Congou black tea. From 1967, it was converted to Yuehong leaf tea, and the second national set of Congou black tea naturally produced broken pieces and dust tea (that is, rolled broken black tea). For domestic black tea, product specification standards have been implemented since 1971. Black tea refining and processing selects Zhejiang rough red as raw material. The refining and processing flow is: raw material blending, grading and issuing for processing, adopting the method of two-stage issuing and single-stage (main grade) recovery, taking material from five routes: itself, long body, round body, light body,
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Detailed Explanation of Black Tea Evaluation Methods and Quality Assessment Points
By comparing with standard sample tea, the appearance and internal quality of finished black tea are organoleptically evaluated to determine its quality grade and level. Congou black tea: emphasis is placed on a beautiful and well-proportioned appearance. Appearance evaluation covers factors such as strip shape, uniformity of pieces, color, and cleanliness. For strip shape, compare length, fineness or bluntness, thickness, and pekoe content; tightly rolled, upright and elegant, with tip buds, visible white pekoe, and a heavy, solid body are superior, while the opposite is inferior. For uniformity of pieces, compare evenness and the proportion of bottom-grade tea; the upper, middle, and lower grades of tea should be blended in appropriate proportions, connecting with one another, without gaps, lying flat and even, with the content of bottom-grade tea (broken tea) being moderate. For color, compare moistness versus dryness and evenness versus mixed appearance; dark moist and well-blended is superior, while dry gray and mottled is inferior.
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What causes blackened leaf tips and root rot in Chinese orchids (Cymbidium)?
1. Excessive temperature and direct sunlight easily scorch the leaf tips. 2. The potting medium is too rich and stays wet without drying out; in mild cases this causes poor root development and blocked nutrient uptake, making the leaf tips prone to blackening, and in severe cases it causes root rot and death of the orchid plant. 3. Pests. There is a pest similar to aphids that congregates in the potting soil and lives on the orchid roots; it is very small and usually hard to spot, and although its direct damage is not great, it easily infects the orchid roots with disease, causing root rot.
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What are the control methods for goji berry black fruit disease?
Black fruit disease is one of the main diseases of goji berry. The pathogen harms the green fruit, flowers and buds of goji berry, and also harms young branches and leaves. The disease is most severe in Shandong, Hebei and Shaanxi regions, causing about 50% yield loss, and up to 80% in severe cases. After the green fruit of goji berry is infected, small black spots or black patches or black net-like lines begin to appear. On cloudy and rainy days, the lesions expand rapidly, turning the fruit black and producing orange-red conidial masses, making it unfit for medicinal use. On sunny days the lesions develop slowly, the lesions turn black, and the unaffected parts can still turn red. Flowers infected
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Introduction to the Japanese Black Sweet Potato 'Purple Dream' Variety
The Japanese Black Sweet Potato is a new variety introduced into China from Japan in 1998 through the relevant authorities. This variety has a delicate mouthfeel, excellent eating quality and high nutritional value, and contains the anti-cancer substance selenium; it has been shown to have notable effects such as anti-cancer activity, blood pressure reduction and calcium supplementation, making it another new raw material for the development of health-care and medical devices. The Japanese Black Sweet Potato has heart-shaped leaves with incised notches and purple-green leaf color; the stems and vines are purple-black; the tubers are spindle-shaped, with purple-black skin and bright purple-black flesh. The stem tips, leaves and stems can all be eaten as vegetables. This variety has extremely strong resistance to disease, drought and waterlogging.
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