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Detailed Guide to Identifying and Controlling the Main Diseases of Lilies
Lilies belong to the genus Lilium in the family Liliaceae and are perennial herbaceous plants, also known as wild lilies and medicinal lilies. In recent years, lily cultivation has been seriously threatened by diseases, mainly lily leaf blight, phytophthora blight, bulb basal rot, and viral diseases. These diseases often occur together, worsening the damage. The usual incidence rate is 10%-15%, and in severe cases it can reach 20%-30%. 1. Several main diseases of lilies (1) Lily leaf blight, also known as lily gray mold, is a commonly occurring disease. It mainly damages leaves, but can also infect stems,
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How to identify a sick rabbit? Three methods to help you tell
First, look: A sick rabbit is listless, emaciated, with bones showing, a ruffled and lusterless coat, and does not shed fur according to the molting season. A healthy domestic rabbit has a strong appetite and eats quickly; a sick rabbit has a poor appetite, eats slowly or refuses food. The droppings of a healthy domestic rabbit are pellet-shaped, oval, uniform in size, with a round, smooth surface. If dry, hard, small droppings appear, it indicates constipation, and more green, succulent feed should be given; if the droppings are tadpole-shaped or soft and loose, this indicates indigestion, and charcoal powder, yeast tablets, etc. should be added to the feed; if the droppings are piled up and
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How to identify high-quality fish fry? Selection tips every farmer must know
"Good seed is half the profit, good seedlings are half the grain." Robust, high-quality fish fry are not only an important factor in improving the survival rate of fry, but also an important foundation and guarantee for increasing fish yield and boosting economic returns. High-quality fish fry should have: appropriate and uniform size, robustness without injury, lively movement, and strong feeding competitiveness. Specifically, identifying high-quality fish fry can be summarized as "three looks and one sampling." First look: the size of the fry. The harvested size of the same fish species from the same pond should be neat and uniform, with little difference in body length and weight. In contrast, inferior fry with large individual differences and unevenness, due to reasons such as food competition, mixed germplasm, and poor feeding, often have a very low overall survival rate. Second look: the body color of the fry. High-quality fry have bright and glossy body color. Different species and different feeding methods produce fry with different body colors. Generally speaking, high-quality silver carp fry should have a silver-gray back and silvery-white sides and belly; high-quality grass carp fry have a light golden-yellow body color, with gray-black net-like scales relatively obvious, and the more robust the fish, the more prominent the light golden-yellow; high-quality bighead carp fry mostly have a light golden-yellow body color, with black markings all over the body not very obvious. If the body color of the fry is darker, or even blackish, it indicates that the fry are weak or diseased. The gloss on the body surface of the fry is caused by the mucus layer covering the body surface, which is rich in proteases, lysozymes, etc., and has the function of protecting the scales and skin of the fry from invasion by diseases and pests; fish or weak fry lack a mucus layer, so the body surface has no gloss. Of course, when fry are attacked by external diseases and pests, they will also secrete a large amount of mucus and lose their gloss. For example, when fish are attacked by Ichthyophthirius multifiliis, the body surface will be covered with a thick layer of mucus, which is a stress response made by the fry to external invasion. Third look: the activity of the fry. High-quality fry are lively in movement, strongly gregarious, quickly gather in groups and dive to the bottom when startled, have strong feeding competitiveness and strong upstream swimming ability. When crowded, the fry heads point downward, and only the tails can be seen constantly fanning; while weak or diseased fry with poor constitution move slowly, do not form groups, swim alone, have weak feeding competitiveness, and poor upstream swimming ability. One sampling: randomly sample fry to check their quality. High-quality fry jump violently when out of water, are plump, with small heads and thick backs, glossy body color, moist muscles, intact scales and fin rays, gill covers not open, tails not bent, no parasites or wounds on the body surface, and normal body shape without deformities. In contrast, weak or diseased fry jump weakly, have incomplete scales and fin rays, congestion, emaciated bodies, large heads and small tails, backs as thin as a knife edge, and even those with "no belly" or that "stick to the net" are considered inferior fry.
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How to identify and control jujube witches' broom? The methods explained clearly in one article
Jujube witches' broom, commonly known as "male jujube tree", is a devastating disease of jujube trees. In severe cases, it can cause mass death of jujube trees and even destroy the entire orchard. 1. Symptom identification (1) The initial symptoms appear after flowering, manifested as degeneration of floral organs and abnormal sprouting of buds; the leaves that grow out are narrow and small, forming clustered branches and leaves, and the young leaves show vein clearing, yellowing and curling into a spoon shape. (2) The leaves of diseased trees show obvious pathological changes after flowering: first the mesophyll turns yellow, then gradually the entire leaf yellows, the edges curl upward, and later the leaves become hard and brittle, dull and lusterless. (3) On the current-year vegetative shoots of diseased plants, the normal buds and
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How to Cleverly Identify Whether Fish Have Eaten Their Fill
1. Pay close attention to how long the fish take to eat at the feeding tray or feeding ground. If, after a certain amount of feed is put in (the normal feeding amount), the fish finish the feed in less than 2 hours, it means the feed is insufficient and some fish have not eaten or have not eaten their fill, so an appropriate amount should be added. If the feeding amount per ten-day period is fixed and the daily feeding amount within the period is the same, but by the end of the period the feed put in is finished by the fish in less than 2 hours, it means the fish have gained weight and the feed amount should be increased. When feeding compound pellet feed, if the feed has already been finished but the school of fish is still swimming rapidly on the surface layer searching for food and is unwilling to sink into the "second layer of water," it indicates the fish have not eaten their fill. If the school of fish has already dispersed from the feeding tray or feeding ground and there is still leftover bait, the fish have eaten more than their fill, and the feeding amount can be appropriately reduced next time.
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What are the methods for identifying the macroscopic characteristics of Gastrodia elata and fake Gastrodia elata?
In recent years, similar plant tubers have often appeared on the market, passing off fake products as genuine and passing off fake products as genuine Gastrodia elata. In order to reduce mistakes and clean up the market, the macroscopic characteristics of several easily confused fake Gastrodia elata are introduced here: Gastrodia elata: "Parrot beak, concave navel, outside has ring spots and dried ginger skin, rosin-like cross-section must be remembered." This is the mnemonic for identifying true and false Gastrodia elata. In this mnemonic, the rosin-like cross-section is an important basis for judging the authenticity of Gastrodia elata. The dried tuber of authentic Gastrodia elata is long elliptical, often flattened, shrunken and curved, 6-13 cm long, 2-6 cm in diameter. One end has a residual stem base or a red-brown withered
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How to Identify True and False Gastrodia? A Detailed Guide to Practical Identification Methods
Gastrodia is a precious Chinese medicinal herb. With the gradual shortage of wild Gastrodia resources, Gastrodia has been listed as a nationally protected third-class endangered plant. In recent years, although artificial cultivation of Gastrodia has progressed rapidly, due to large demand, market shortages, and firm prices, some lawbreakers have taken the opportunity to pass off fakes as genuine. For this reason, the methods for identifying true and false Gastrodia are introduced as follows: 1. True Gastrodia. It has eight major characteristics: (1) The underground tuber is ovate or elliptical; after processing, steaming, and drying, it usually appears as a long ellipse, slightly flat, sometimes curved,
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How do you identify sheep diseases? Remember these eight points to observe
With the adjustment of the structure of livestock breeds, Boer goat farming has become the first choice for farmers to get rich and reach a moderately prosperous life. Boer goats are an introduced breed, few in number and expensive. In addition to strengthening feeding management, the growth and activity of Boer goats should be observed frequently to ensure timely treatment in the early stage of illness and reduce losses. Generally, the following aspects are carefully observed and comprehensively judged to determine whether they are sick. 1. Look at the demeanor. Healthy Boer goats are full of energy, move agilely, and have bright eyes. Sick goats are sluggish, prefer to lie down, hang their heads, shed tears, and are afraid of light. 2. Look at feed
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How to Identify Adulterated Pig Feed? A Few Practical Methods to Teach You
(1) Observe with your eyes. Buy 1 magnifying glass, with a higher magnification. Sift the feed with a sieve, spread it into a thin 1 layer, and carefully observe the material on the sieve and below the sieve with the magnifying glass. The characteristics of some of these materials under the magnifying glass are as follows. 1. Fishmeal The main components of fishmeal are fish meat, fish bones, fish spines, fish scales, fish eyes, etc., and no other substances should be present. Under the magnifying glass are fish scales and fish eyes; the fish scales are covered with concentric circles, the fish bones from the head are flaky, the fish spines are tetrahedral, and the fish meat is composed of muscle fibers. 2. Blood meal The edges of the particles are sharp and reddish-brown; the black shell fragments are usually tightly curled, with a smooth surface and marks like needle pricks. Hard seed hilums can also be seen, oblong, yellow, brown, or black. 3. Rapeseed cake (meal) The rapeseed meal shell is brown or black, with a meat-like texture on the surface. 4. Cottonseed cake (meal) The cotton shell has two layers and does not separate; the outer layer is dark and the inner layer is light, and the outer shell is connected to the cotton lint; there are many fine hairs, appearing silvery under the lens. 5. @#@245@#@ Bran is mainly the outer skin of wheat; the bran flakes are flaky and contain many starch granules. 6. Bone meal is bone fragments, opaque, white, lusterless, with a rough surface and hard texture. 7. Shell meal is a white or gray powder, and some shells still have faint lines.
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How to Identify Authentic vs. Fake Gastrodia elata? A Quick Guide to Telling Real from Fake
In recent years, due to excessive harvesting for medicinal use, wild Gastrodia elata has been steadily declining, and the medicinal material is in very short supply. Gastrodia elata is an important medicinal material for treating vertigo. Its nature and flavor are sweet and neutral, and it enters the liver meridian. Its main function is to calm the liver and extinguish wind. For dizziness and blurred vision, flushed face, and light-headedness with heavy feet caused by liver yang rising, or for high fever with convulsions, epileptic spasms, and opisthotonus caused by internal stirring of liver wind, taking Gastrodia elata in combination with other drugs often produces good results. In view of this, some unscrupulous merchants pass off similar rhizomes as Gastrodia elata to deceive consumers. On the market
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