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Symptoms and Control Methods of Porcine Eperythrozoonosis
A pig farm in Zhangshu City, Jiangxi Province, raises 600 finishing pigs, all of which have been effectively vaccinated according to the immunization program against swine fever, swine erysipelas, swine pasteurellosis, Streptococcus suis, and other diseases. Recently, some pigs showed depression, reduced or lost appetite, body temperature of 40-41.8°C, anemia, and difficulty breathing. Most pigs were constipated, with lard-like mucus on the fecal pellets. In the middle and late stages, the ear wings, underside of the abdomen, and extremities of the limbs of sick pigs turned red first and then purple. The on-site veterinarian treated them with gentamicin, penicillin, sulfonamides, and other drugs combined with metamizole sodium, but the
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What are the pest and disease control methods for Chuanxiong (Medicinal cyathula, Cyathula officinalis)?
The main disease during the growing period of Medicinal cyathula (Cyathula officinalis) is white rust. The symptoms of this disease are that all aboveground parts of the plant can be affected, manifesting as damage to the leaves, with pale yellow-green patches appearing on the leaf surface and corresponding blister-like protrusions growing on the underside, 1-2 mm in diameter. After the epidermis ruptures, a white, glossy, sticky-slimy powdery substance is released. When many blister spots occur, the diseased leaves turn yellow and brown. When it occurs on parts such as leaf petioles and young buds, pale yellow spots are produced, which later become white blister spots, and the diseased stems are often swollen and twisted. The pattern of white rust development is that the pathogen mainly overwinters as oospores
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How to prevent and control red and white plastron disease in soft-shelled turtles? Detailed explanation of causes and prevention methods
Red and white plastron disease in soft-shelled turtles (commonly known as red plastron and white plastron disease) has been a relatively serious turtle disease in China in recent years, and so far there is still no ideal treatment method. However, through efforts in various aspects, the main pathogens and disease onset conditions of red and white plastron disease have basically been identified, and breakthrough progress has been made in prevention, especially in research on disease prevention with Chinese herbal medicines and immune vaccines, laying a foundation for controlling the occurrence of red and white plastron disease in the future. Based on relevant domestic research and my own practice, the author introduces the occurrence and prevention of red and white plastron disease as follows, for reference and application by interested parties.
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Control methods for common fish diseases in early summer
In early summer, water temperatures are suitable, and various pathogens readily breed and multiply, making it a season when fish become ill. If prevention is neglected, fish diseases are easily triggered. Grass carp in particular have a high mortality rate when they fall ill, causing great losses. The symptoms and control methods of four major fish diseases are introduced below: 1. Saprolegniasis: Symptoms: local injury to the fish body, loss of scales, mold or fuzz on the body surface. Abnormal swimming, reduced feeding, leading to emaciation and death. Cause: mainly injury to the fish body after harvesting, after which the disease invades the weakened fish and causes illness. Pre
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How to kill scarab beetles? Five effective control methods
The larvae of scarab beetles, commonly known as chicken-manure grubs, gnaw at the roots of seedlings. Besides biting through lateral roots and the main root, they can also strip and devour the root bark completely, causing missing seedlings and broken rows, and in severe cases even disastrous damage. Adult scarab beetles feed on both leaves and flowers, and they reproduce extremely quickly, so they can easily harm seedlings. They are a common major pest in forestry. The period when adults cause rampant damage is roughly from June to October, and this is the best time for control: it both controls the damage caused by adults and keeps the next generation's population density in check, yielding twice the result with half the effort.
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Prevention and Control Methods and Technical Key Points for Protozoan Diseases in Large Yellow Croaker
(1) Pathogen: Cryptocaryon irritans (Crypjocaryonirrions). (2) Symptoms: Small white spots appear on the body surface and gills of diseased fish. These small white spots are white vesicles formed by the parasitism of the parasite, irritation of the host, and the secretion of large amounts of mucus and proliferation of epidermal cells in the surrounding tissues. In severe cases, the body surface tissues are destroyed. If bacteria invade, it can cause skin inflammation, scale loss, fin membrane rot and splitting, corneal damage, and blindness. The diseased fish ultimately die due to loss of appetite,
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Common pests and predators in soft-shelled turtle farming and their control methods
The main predators of soft-shelled turtles include rats, snakes, birds, ants, mosquitoes, etc. They mainly harm turtle eggs and juvenile turtles under 1 year of age; turtles over 1 year old with strong constitutions are rarely harmed. Among them, rats cause the greatest harm to turtle eggs. In the dead of night, which is the good time for turtles to lay eggs, rats also come out of their holes and move frequently around the egg-laying sites. On one hand, they disturb the normal egg-laying of turtles; on the other hand, rats dig holes all over the sand bed, causing the turtle eggs to vibrate and leading to embryo death. Juvenile and young turtles are also easily surrounded and
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How to control shortawn foxtail in garlic fields? Detailed control methods
During the garlic growing season, grass weeds such as shortawn foxtail (Alopecurus aequalis) in the field can be controlled with herbicides such as quizalofop-p-ethyl, haloxyfop-R-methyl, and clethodim. Apply the herbicide early, when the weeds in the field have basically all emerged and are at the 2-4 leaf stage; when the weeds are older, appropriately increase the application rate. In addition, when quizalofop-p-ethyl is used at temperatures below 10°C, its control effect on weeds drops noticeably, so apply it when the temperature is high if possible. Clethodim also has a relatively good control effect on weeds when used at lower temperatures, and since the temperature has been low recently, this herbicide can be given priority.
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Detailed Explanation of the Occurrence Patterns and Control Methods of the Jujube Inchworm
The jujube inchworm, also known as the jujube spanworm, dingmenchi, or gongyao worm, belongs to the order Lepidoptera, family Geometridae, and is one of the major pests of jujube leaves. I. Occurrence Patterns The larvae damage the tender buds, leaves, and flower buds of jujube. It has 1 generation per year, overwintering as pupae in the soil 10-15 cm deep around the tree canopy. In early March of the following year, they emerge as adults. After mating, they lay eggs. The female adults are wingless and must crawl up the tree trunk to lay eggs. After an egg stage of about 22 days, from late March to early April, the larvae hatch and climb up the tree to cause damage. Larvae in the 1st to 3rd instars have a small appetite and mainly feed on tender leaves.
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Control Methods and Technical Key Points for the Chestnut Gall Wasp
The chestnut gall wasp Dryocosmus kuriphilus Yasumatsu belongs to the order Hymenoptera, family Cynipidae, and is also known as the chestnut tumor wasp. It is widely distributed in chestnut-growing areas, where its larvae damage the new buds of chestnut trees. When chestnut buds sprout in spring, the damaged buds fail to sprout and gradually swell to form galls, sometimes with deformed small leaves growing on the galls. In severe cases, the tree vigor weakens and branches or the whole tree may die. Morphology: adult body length 2.5-3 mm; head and abdomen dark brown;
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