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Prevention and Control Methods and Technical Key Points for Canine Distemper in Foxes, Raccoon Dogs and Mink
In some fox and raccoon dog farms and mink farms, outbreaks of canine distemper have occurred. Regarding the prevention and control of canine distemper, the following views are discussed: Concerning the prevention and control of canine distemper, after decades of research, a variety of attenuated and inactivated vaccines have been developed in terms of its etiology, pathogenesis, epidemiological characteristics, clinical symptoms, pathological diagnosis and immunoprophylaxis, and many vaccines have already been supplied to the market as official commercial products. However, in recent years, the prevalence of canine distemper and the losses it has caused to the world's dog industry and fur animal breeding industry have far exceeded
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Identification and Control Methods of Scorpion Mold Disease
This disease is caused by green mold parasitizing and multiplying inside the scorpion's body, and it usually occurs in summer when the environment is damp and the relative air humidity is high. Symptoms of affected scorpions are as follows: in the early stage of the disease, the scorpion is extremely restless and irritable, and small yellowish-brown or reddish-brown mold spots often appear on the sternites and the anterior abdomen, which spread and expand into patches. The scorpion's growth stalls, its activity decreases, it becomes sluggish, stops eating, and may even die, with its body filled with green mold-like mycelium that forms fungal masses. Control methods: the food dish and water dish used for feeding scorpions should be washed and scrubbed clean regularly; keep the environment clean and hygienic
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Occurrence Patterns and Control Methods of Silkworm Muscardine
Silkworm muscardine, also known as hardening disease, is a silkworm disease caused by fungal parasitism. The bodies of diseased silkworms dry out and harden, with mycelium and conidia growing on the body surface. Because the bodies of diseased silkworms produce spores of different colors on the outside, the disease can be divided into white muscardine, green muscardine, yellow muscardine, gray muscardine and brown muscardine, among which white muscardine is the most common. There are two routes of infection: contact infection and wound infection. In both cases, pathogen spores attach to the surface of the silkworm body through media such as air and mulberry leaves, then penetrate into the silkworm body and parasitize it. If not controlled in time, it spreads very quickly and the mortality rate is relatively high.
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How to control oleander aphids? Aphid control methods for garden ornamental trees
Distribution and damage The oleander aphid Aphis nerii Boyer de Fonscolombe, also known as the oleander yellow aphid, belongs to the order Homoptera, family Aphididae. It is distributed in Changchun, Shenyang, Baotou, Taiyuan, Ningbo, Guiyang, Urumqi and other places. It pierces and sucks sap from the new shoots and young leaves of oleander plants, affecting normal plant growth and flowering. Morphological characteristics: wingless female aphid body length 2 mm, body apricot yellow, antennae dark brown, legs black, cauda tongue-shaped, with 11-14 curved hairs. Winged female aphid oval, head and thorax black,
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How to control oleander aphids? A full breakdown of practical methods
Oleander aphid, also known as the kapok aphid, belongs to the order Homoptera, family Aphididae. It is distributed throughout southern China, as well as in various countries of Southeast Asia, Africa, and South America. Damage symptoms: nymphs or aphids attack oleander, stunting the growth of affected new shoots, turning the upper and lower leaves black, and causing flower buds and flowers to develop incompletely and open abnormally, reducing ornamental value. Morphological characteristics: the wingless parthenogenetic female is oval in shape, 2.3 mm long, yellow like a banana peel. The frontal tubercles are raised, higher than the median frontal tubercle; the antennae are dark, with coarse tile-like sculpturing; the rostrum reaches the middle coxae. The cornicles are long and tubular, dark
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Symptom Identification and Control Methods for Oleander Leaf Spot
Symptoms: The spots occur at the edges or center of the leaves, semicircular or circular in shape; when several spots merge, they form a wavy pattern. They appear on both the upper and lower surfaces, with the upper surface slightly darker than the lower, and the spots are grayish-white or grayish-brown. In the later stage, a black powdery mold layer appears on the diseased parts, generally on old leaves. Pathogen and disease status: The pathogen is a fungus of the genus Alternaria (Alternaria sp.). Spores spread by wind and rain, and excessive rain easily triggers this disease. The disease occurs more often on old leaves, lower leaves, and tiller shoots sprouting from the roots. Control methods: 1. Strengthen
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Causes of Deformed Shiitake Mushrooms in Off-Season Cultivation and Their Prevention and Control Methods
The edible mushroom industry is an important part of agriculture. Vigorously developing the edible mushroom industry can not only promote a virtuous cycle of the ecosystem, but also increase farmers' income and improve agricultural efficiency, achieving an organic unity of economic, ecological and social benefits. With the development of the edible mushroom industry, although shiitake production ranks only second, the economic benefits it delivers should rank first. How to improve shiitake yield and quality is of great significance to the many practitioners in the field. In off-season cultivation of shiitake, deformed mushrooms often appear due to inadequate production management
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Why Does Schisandra Drop Its Flowers and Fruit? Causes and Control Methods
I. Causes of flower and fruit drop 1. Low-temperature freezing damage causes flower drop. In some areas of the east, the last frost period occurs in mid-May, and cold air masses cause physiological chilling injury, causing some flower buds to drop. 2. Herbicide drift causes flower drop. Field herbicides are mostly used in late April and early May, which is exactly the flowering period of Schisandra. Herbicide drift directly damages Schisandra petals, preventing female flowers from pollinating normally and causing flower drop. 3. Pests and diseases cause fruit drop. The main diseases are root rot, leaf blight, and powdery mildew, which cause fruit drop when they occur severely;
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Occurrence and Control Methods of Powdery Mildew in Licorice
The pathogen is a type of imperfect fungus among the fungi, with the scientific name Erisiphepolygoni. It damages the leaves, and diseased leaves develop white powdery growth on both the upper and lower surfaces. For control, spray 0.2-0.3 degrees Baume lime sulfur mixture.
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Identification of Symptoms and Control Methods for Powdery Mildew on Licorice
It mainly damages leaves, and can also damage pods. The surface of affected leaves and pods is covered with a layer of white powder, and later many small black spots appear on the lesions, which can cause early defoliation or wilting of the whole plant. Control methods: spray 0.1-0.3 degrees Baume lime sulfur mixture, 50% thiophanate-methyl wettable powder 800 times dilution, 50% amobam 600 times dilution.
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