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6 common situations that affect fish feeding
In intensive fishery production, the management of feed feeding is one of the main links in the entire production management. During the feed feeding process, the phenomenon of reduced feed intake by fish often occurs. Based on different situations in production, the author describes the reasons for reduced feed intake by farmed fish as follows: The first situation: fish are currently diseased, causing reduced feed intake by fish. For example, when diseases such as crucian carp internal sporidiosis, grass carp three diseases, channel catfish hemorrhage disease, and enteritis occur, the feed intake of fish is significantly reduced. When grass carp fingerlings and crucian carp
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What varieties of snakehead fish are there? An introduction to common snakehead varieties
Scientific name: Channa Striatus. Malay names: Haruan, Aruan, Ruan, Taman Paya. English name: Striped Snakehead. Common names: striped snakehead, snakehead murrel. Other names: black fish, cai fish, wu bang, spotted snakehead, snakehead fish, xiao fish, sang yue, mo tou fish, etc. The snakehead is a valuable freshwater fish of the family Channidae, notable for its large size, fast growth, high yield and high economic value.
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What causes vomiting in pigs? Common diseases and prevention and treatment methods
In production, the symptom of vomiting in pigs can often be seen. Sometimes we may think it is some common gastrointestinal disease, but we must pay attention to the possibility that it may be caused by certain infectious diseases. Below is a summary of the diseases that can cause vomiting in pigs. 1. Porcine transmissible gastroenteritis. Porcine transmissible gastroenteritis is a highly contagious viral infectious disease characterized by causing vomiting, severe diarrhea and high mortality in piglets under 2 weeks of age. Although pigs of different ages are all susceptible to this virus,
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How to treat common miscellaneous ailments in pigs? A few practical folk remedies to teach you
1. Common cold: ① Scallion white 90 g, ginger 60 g, add an appropriate amount of water and boil, use the hot water to fumigate the affected pig's mouth and nose, the effect is remarkable. ② Cocklebur fruit 25 g, fry until scorched and grind into powder, mix into feed and feed, 3 times a day. ③ Fennel 15 g, grind into powder after frying, add brown sugar 50 g, warm water 100 g and mix to feed. ④ Tea leaves 100 g, brew with boiling water, then add mung bean powder 200 g and alum 15 g and feed. 2. Mange (commonly known as scabies): ① Tobacco leaves 1 part, water 20 parts, boil for 1 hour, then remove the tobacco leaves and use the remaining water to wash the affected area. ② Use
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What are the control methods for common physiological diseases of edible fungi?
1. Mycelial overgrowth After inoculation of edible fungi, vegetative growth is excessive, and the fluffy mycelium grows densely. After casing soil is applied, it often "drills" out of the ground and forms a mycelial mat. This situation is related to the characteristics of the strain and environmental conditions. Low water content in the soil layer, excessively high nitrogen content in the compost, poor ventilation, and excessively high air humidity all easily cause mycelial overgrowth, producing the phenomenon of "mycelium emergence." Common control methods: select high-quality strains; pry loose and break up the hardened mycelial mat; cover with fine soil, increase ventilation, and lower relative air humidity; use heavy watering to promote mycelial
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Identification and Control Methods for Common Diseases of Edible Fungi
Brown rot, also known as white rot, wet bubble disease, etc. When diseased mushrooms are infected at a young stage, they cannot further differentiate and develop, and later form deformed mushrooms, often with a layer of "white fuzz" growing on the surface, which is the mycelium of the pathogen. When the temperature is above 20°C, over 4 to 5 days, the diseased mushrooms darken in color, then rot, exuding a brown (soy-sauce-like) liquid and becoming decayed and foul-smelling; below 20°C, this process takes longer. When the fruiting body is infected at the mid stage, brown lesions appear on the cap, the stipe becomes swollen and thick, and then the mushroom body softens. Cutting open the diseased mushroom reveals that its interior changes from white to grayish-white
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Identification and control methods for several common diseases of edible fungi
I. Causes of deformed mushrooms and measures to avoid them. Deformed mushrooms lower product grade and may even lose their commercial value, affecting the economic benefits of cultivation; this problem is widespread. Common deformed mushrooms include: caps tightly clasped and not opening, appearing "fist-shaped"; stipes long, thick and fleshy with small caps, appearing "vase-shaped"; caps sunken with cracked, outward-curling edges, appearing "broken-bowl-shaped"; caps narrow and long, appearing "ox-tongue-shaped"; caps with spots on the surface, appearing "pockmarked"; caps with swollen tumor-like protrusions in the center, appearing "belly-swollen"; two caps spreading side by side with stipes tightly joined, appearing "butterfly-shaped"; caps curved and uneven, appearing "wavy-edged"
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Common Pests and Diseases of Golden Privet and Their Control Methods
Content: We have a large area of golden privet (Ligustrum vicaryi). Every year in the hot, humid season, the leaves drop in patches until the plants turn yellow and wither. What is the cause, and how can it be controlled? Reply: It may be "golden privet leaf spot" caused by a fungus. Once the plum rain season ends, it spreads everywhere, and affected golden privet quickly loses all its leaves. It is generally caused by planting density being too high, and in recent years it has appeared in large numbers in Shanghai. Control: spray with a fungicidal pesticide.
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Control Methods for Common Diseases and Pests of Golden Privet
The diseases commonly affecting golden privet (Ligustrum vicaryi) mainly include: leaf spot, ring rot, and sooty mold. The main pests include: scale insects and white grubs. Brown spot disease Brown spot disease is the most serious leaf spot disease of privet and is caused by pathogenic fungi. In the early stage of the disease, small brown spots appear on the leaves, surrounded by purplish-red halos, and black mold-like substances are visible on the spots. As the temperature rises, several spots sometimes merge together, and eventually the leaves wither and fall off. The optimum temperature range for the growth of this pathogen is 25°C to 30°C, and the optimum temperature for spore germination is 1
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What are the common pests of golden privet (Ligustrum vicaryi)? A detailed guide to control methods
Golden privet (Ligustrum vicaryi) is a semi-evergreen small shrub of the genus Ligustrum in the family Oleaceae. Because its young shoots are golden yellow and it tolerates pruning and drought, it is often combined with red-flowered Loropetalum (Loropetalum chinense var. rubrum), azaleas (Rhododendron) and Chinese juniper (Juniperus chinensis) to decorate flower beds and green belts. High-density planting often makes pest problems more severe, causing new shoots to grow slowly or not sprout at all, weakening the plants and even killing them. The common and most damaging pests of golden privet are: the citrus mealybug (Planococcus citri), the privet leaf-mining flea beetle, and the yellow-ringed silk-fringed pyralid moth. 1 Citrus mealybug adults and nymphs rest on the branches and leaves of golden privet and suck plant sap with their piercing-sucking mouthparts,
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