Green shrimp, scientific name Japanese giant shrimp, because of its small individual, suitable for paddy field farming, become an important species of farmland structure adjustment. Rice field shrimp has the characteristics of low production cost, short breeding cycle, easy to grasp technology, and high economic benefit, and has been greatly promoted in recent years. However, with the rapid development of the shrimp industry, the disease has gradually spread and the damage has become increasingly serious. According to our investigation, there are currently 11 types of diseases found in the four species of shrimp. The common diseases and prevention methods of shrimp are introduced as follows.
l Black shell disease (also known as black shell disease, moss disease)
1.1 etiology: Adherent algae, mainly some attached diatoms, brown algae, filamentous algae and so on.
1.2 Diseases: The body surface of the shrimp is attached by algae, and its body color is black or dark green, and the infection is serious. It is wrapped in moss. Poor physique, significantly reduced mobility, can not be smooth oyster shell. The lack of oxygen in the pool can cause a large number of deaths.
1.3 Prevention:
1.3.1 acres of lime with 150-200 kg clear pond disinfection.
1.3.2 Change the water frequently to keep the water fresh.
1.3.3 Each month of the epidemic season, sputum is thrown with 0.3-0.4mg/L.
1.4 Treatment:
1.4.1 The fibrin killing star or crustine 0.3-0.4mg/L Quanchiposa, once again in severe every other day.
1.4.2 When fibric killing star or crustine 0.3-0.4mg/L is used once, it can be cured with 0.3-0.4mg/L bromochloroheine or 0.2-0.3mg/L dibromohydantoin once every other day.
2 fixed ciliate disease
2.1 Cause: Caused by a variety of protozoan parasites of the cilia. The main species are bell-shaped insects, poly-worms, and worms.
2.2 Diseases: On the surface of the diseased shrimp, yellowish cotton flocks are attached to the surface of the body surface, tendons, and appendages. When the parasites are parasitized in the septum, the indole may become black, degeneration or necrosis of the tendon tissue, and secondary bacterial infection. When the body surface infection is severe, it hinders crustacea and causes death.
2.3 Prevention and treatment: Algae attached diseases.
3 Gill disease
3.1 Cause: The disease is mainly caused by bacteria such as Aeromonas hydrophila.
3.2 Disease: The color of the crust of the shrimp first turns red, and then gradually produces black spots. The cocoon wire is incompletely damaged and ulcerated, and the sick shrimp die due to breathing difficulties.
3.3 Prevention:
3.3.1 Lime thoroughly clears the pond.
3.3.2 Seedlings are soaked with 2–3% saline for 15–30 minutes.
3.3.3 Sprinkle lime or bleach every half month and use them alternately. The amount of quicklime is 1 to 8 meters per mu, and bleaching powder is 1 to 1.5 mg/L.
3.4 Treatment: Choose any of the following methods can be treated.
3.4.1 Strong germicidal disinfectant 0.8-lmg/L Quanchiposa, intensive use of 2-3 times.
3.4.2 Zhongshui Brand Bromochlor Hydrate 0.3-0.4mg/L Quanchiposa, intensive use of 2-3 times.
3.4.3 Zhongbo Brand Weilongjiang 0.3-0.4mg/L Quanchiposa, severe use of 2-3 times.
3.4.4 Haide brand Xiaoqingling 0.3-0.4mg/L Quanchiposa, intensive use of 2-3 times.
4 rotten eyes
4.1 Cause: The disease is caused by a bacterial infection.
4.2 Illness: Shrimp swims slowly and floats on the grass or the pool. Eye damage, swelling, corneal color from black to brown, severe eye ulceration, loss, leaving the eye stem.
4.3 Prevention and treatment: with the rot disease.
5 Red body disease (alias red head disease, red leg disease)
5.1 Cause: Caused by multiple Vibrio infections.
5.2 Disorders: The main feature of the disease is the reddening of the body and appendages. Some of the shrimps are changed from transparent cyan to orange-red near the heart area, commonly known as red head disease. The disease is characterized by fulminant illness. Some diseased shrimp have not shown red body symptoms, that is to say, they have fallen to water plants or died by the pool.
5.3 Prevention: The same disease.
5.4 Treatment: The efficacy of the combination of oral administration and external elimination of red body disease in shrimp is better.
5.4.1 Internally:
5.4.1.1 Shrimp disease should be added to the feed with 5-6 pounds of feed and feed for 4-6 days.
5.4.1.2 Shrimp bacteria are mixed in the feed with 3 to 5 pounds of feed and feed for 4 to 6 days.
5.4.1.3 Shrimp disease Kang 3 to 5 wolfberry added in the feed, feed 4-6 days.
The above three kinds of internal medicines are optionally taken orally, and if 1 more garlic is added, the treatment effect is better.
6 Carapace canker disease (also known as brown spot, scrape disease)
6.1 Etiology: The disease is mainly caused by some bacteria that have the ability to break down chitin. There are about 30 strains of Klebsiella, Vibrio, Pseudomonas, Aeromonas, and Pasteurella that are obtained from the lesions. However, due to the unsuccessful artificial infection and the stimulation of the chemical substances in the environment and the unbalanced nutrition, it is also believed that the disease is a comprehensive disease.
6.2 Diseases: Diseased shrimp, appendages, antennae, tail fans, etc., appear red or black spots or plaque ulcers, lesions increase when the lesions increase, rot, severe infection can penetrate the carapace into the soft tissue, so that Part of the lesions adhered, impeding growth of the clams of the shrimp, and some appendages, tentacles, tail fans, and even broken bones.
6.3 Prevention and treatment: Same as red body disease.
7 Saprophyte
7.1 Etiology: When shrimps are physically weak, especially after they are injured, they are affected by aquatic molds in the water.
7.2 Disease: The surface of diseased shrimp is covered with white cotton floc.
7.3 Prevention:
7.3.1 Disinfect the pond thoroughly with quick lime.
7.3.2 Seedlings should be carefully handled during the period of catching, transporting and stocking.
7.4 Treatment:
7.4.1 Formalin 20-25mg/L Quanchiposa, change the water after 24 hours, change the amount of water more than half.
7.4.3 Zhongbo dichlorine 0.3-0.4mg/L Quanchiposa, use 2-3 times.
8 White body disease (also known as white turbid disease, muscle necrosis)
8.1 Etiology: It is not yet clear that suspicion is related to adverse environmental or malnutrition.
8.2 Disorders: In the early stage, the muscles of the shrimp body became cloudy and opaque, and when the fish were caught or frightened, the flesh of the body rapidly turned white and muscle necrosis led to death.
8.3 Control methods: Reasonable stocking, 30,000 shrimps per mu. Ponds with water depths of 0.8 meters or more, which do not meet the requirements of the pond, must be excavated in deep trenches with a depth of 1 meter or more.
Adding biologically active substances to the feed, the symptoms of the white body disappeared after half a month.
l Black shell disease (also known as black shell disease, moss disease)
1.1 etiology: Adherent algae, mainly some attached diatoms, brown algae, filamentous algae and so on.
1.2 Diseases: The body surface of the shrimp is attached by algae, and its body color is black or dark green, and the infection is serious. It is wrapped in moss. Poor physique, significantly reduced mobility, can not be smooth oyster shell. The lack of oxygen in the pool can cause a large number of deaths.
1.3 Prevention:
1.3.1 acres of lime with 150-200 kg clear pond disinfection.
1.3.2 Change the water frequently to keep the water fresh.
1.3.3 Each month of the epidemic season, sputum is thrown with 0.3-0.4mg/L.
1.4 Treatment:
1.4.1 The fibrin killing star or crustine 0.3-0.4mg/L Quanchiposa, once again in severe every other day.
1.4.2 When fibric killing star or crustine 0.3-0.4mg/L is used once, it can be cured with 0.3-0.4mg/L bromochloroheine or 0.2-0.3mg/L dibromohydantoin once every other day.
2 fixed ciliate disease
2.1 Cause: Caused by a variety of protozoan parasites of the cilia. The main species are bell-shaped insects, poly-worms, and worms.
2.2 Diseases: On the surface of the diseased shrimp, yellowish cotton flocks are attached to the surface of the body surface, tendons, and appendages. When the parasites are parasitized in the septum, the indole may become black, degeneration or necrosis of the tendon tissue, and secondary bacterial infection. When the body surface infection is severe, it hinders crustacea and causes death.
2.3 Prevention and treatment: Algae attached diseases.
3 Gill disease
3.1 Cause: The disease is mainly caused by bacteria such as Aeromonas hydrophila.
3.2 Disease: The color of the crust of the shrimp first turns red, and then gradually produces black spots. The cocoon wire is incompletely damaged and ulcerated, and the sick shrimp die due to breathing difficulties.
3.3 Prevention:
3.3.1 Lime thoroughly clears the pond.
3.3.2 Seedlings are soaked with 2–3% saline for 15–30 minutes.
3.3.3 Sprinkle lime or bleach every half month and use them alternately. The amount of quicklime is 1 to 8 meters per mu, and bleaching powder is 1 to 1.5 mg/L.
3.4 Treatment: Choose any of the following methods can be treated.
3.4.1 Strong germicidal disinfectant 0.8-lmg/L Quanchiposa, intensive use of 2-3 times.
3.4.2 Zhongshui Brand Bromochlor Hydrate 0.3-0.4mg/L Quanchiposa, intensive use of 2-3 times.
3.4.3 Zhongbo Brand Weilongjiang 0.3-0.4mg/L Quanchiposa, severe use of 2-3 times.
3.4.4 Haide brand Xiaoqingling 0.3-0.4mg/L Quanchiposa, intensive use of 2-3 times.
4 rotten eyes
4.1 Cause: The disease is caused by a bacterial infection.
4.2 Illness: Shrimp swims slowly and floats on the grass or the pool. Eye damage, swelling, corneal color from black to brown, severe eye ulceration, loss, leaving the eye stem.
4.3 Prevention and treatment: with the rot disease.
5 Red body disease (alias red head disease, red leg disease)
5.1 Cause: Caused by multiple Vibrio infections.
5.2 Disorders: The main feature of the disease is the reddening of the body and appendages. Some of the shrimps are changed from transparent cyan to orange-red near the heart area, commonly known as red head disease. The disease is characterized by fulminant illness. Some diseased shrimp have not shown red body symptoms, that is to say, they have fallen to water plants or died by the pool.
5.3 Prevention: The same disease.
5.4 Treatment: The efficacy of the combination of oral administration and external elimination of red body disease in shrimp is better.
5.4.1 Internally:
5.4.1.1 Shrimp disease should be added to the feed with 5-6 pounds of feed and feed for 4-6 days.
5.4.1.2 Shrimp bacteria are mixed in the feed with 3 to 5 pounds of feed and feed for 4 to 6 days.
5.4.1.3 Shrimp disease Kang 3 to 5 wolfberry added in the feed, feed 4-6 days.
The above three kinds of internal medicines are optionally taken orally, and if 1 more garlic is added, the treatment effect is better.
6 Carapace canker disease (also known as brown spot, scrape disease)
6.1 Etiology: The disease is mainly caused by some bacteria that have the ability to break down chitin. There are about 30 strains of Klebsiella, Vibrio, Pseudomonas, Aeromonas, and Pasteurella that are obtained from the lesions. However, due to the unsuccessful artificial infection and the stimulation of the chemical substances in the environment and the unbalanced nutrition, it is also believed that the disease is a comprehensive disease.
6.2 Diseases: Diseased shrimp, appendages, antennae, tail fans, etc., appear red or black spots or plaque ulcers, lesions increase when the lesions increase, rot, severe infection can penetrate the carapace into the soft tissue, so that Part of the lesions adhered, impeding growth of the clams of the shrimp, and some appendages, tentacles, tail fans, and even broken bones.
6.3 Prevention and treatment: Same as red body disease.
7 Saprophyte
7.1 Etiology: When shrimps are physically weak, especially after they are injured, they are affected by aquatic molds in the water.
7.2 Disease: The surface of diseased shrimp is covered with white cotton floc.
7.3 Prevention:
7.3.1 Disinfect the pond thoroughly with quick lime.
7.3.2 Seedlings should be carefully handled during the period of catching, transporting and stocking.
7.4 Treatment:
7.4.1 Formalin 20-25mg/L Quanchiposa, change the water after 24 hours, change the amount of water more than half.
7.4.3 Zhongbo dichlorine 0.3-0.4mg/L Quanchiposa, use 2-3 times.
8 White body disease (also known as white turbid disease, muscle necrosis)
8.1 Etiology: It is not yet clear that suspicion is related to adverse environmental or malnutrition.
8.2 Disorders: In the early stage, the muscles of the shrimp body became cloudy and opaque, and when the fish were caught or frightened, the flesh of the body rapidly turned white and muscle necrosis led to death.
8.3 Control methods: Reasonable stocking, 30,000 shrimps per mu. Ponds with water depths of 0.8 meters or more, which do not meet the requirements of the pond, must be excavated in deep trenches with a depth of 1 meter or more.
Adding biologically active substances to the feed, the symptoms of the white body disappeared after half a month.
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