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How to prevent and treat calf myocarditis with myocardial and skeletal muscle degeneration, necrosis and discoloration?
Prevention and treatment methods for calf myocarditis with myocardial and skeletal muscle degeneration, necrosis and discoloration
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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 keep the cardinal tetra? Care methods and precautions
Native to the middle and lower reaches of the Amazon River. The fish body is 4 cm to 5 cm long, spindle-shaped, and laterally compressed. The body is slightly wider than that of the neon tetra. The dorsal and ventral margins form a shallow arc, and the head and caudal peduncle are correspondingly wider, with a rounded, blunt snout tip. The mouth is slightly large, and the eyes are also large, located at the upper front of the head. The dorsal and pectoral fins are normal in shape, and the distance from the origin of the dorsal fin to the snout tip is slightly shorter than the distance to the base of the caudal fin. The anal fin is elongated, and the caudal fin is forked. The body color is very brilliant, with a yellow-green appearance on the back. The striking feature of this fish is on both sides: from the rear edge of the eye to the caudal peduncle there is a relatively wide blue longitudinal band, and below the longitudinal band there is
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Causes and Control Methods of Silkworm White Muscardine
Silkworm white muscardine is caused by Beauveria bassiana entering the silkworm body through the skin. The route of infection is contact transmission. After the silkworm dies, the body is first soft and then hard, covered entirely with white conidia, and is called a "white muscardine silkworm." Beauveria bassiana prefers moisture and fears dryness; in humid places and rainy seasons, silkworms are very prone to the disease. If disinfection and disease prevention work is neglected during the silkworm rearing period, it will cause a major outbreak of white muscardine. Causes of silkworm white muscardine ① The rearing rooms and rearing tools for cooperative rearing of young silkworms were not thoroughly disinfected according to the prescribed standards, and the residual amount of Beauveria bassiana was high.
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