Recently, the Chongqing Meteorological Bureau released the trend of meteorological disasters, and it is expected that from now until the end of August, the high temperature weather time is long, and there are 4 to 6 regional heavy rain weather processes, which are still heavier than the perennial and the same period last year. At the same time, the west, southwest and southeast remain prone areas for heavy rains, flash floods and geological disasters. All farm stations should strengthen flood prevention and heat prevention work, water quality management can not be relaxed, pay close attention to weather forecasts, and prevent floating heads and flood ponds.
First, the diagnosis of the disease
According to the aquaculture disease monitoring data of the same period in recent years, the key breeds in our city are susceptible to disease as follows:
(1) Grass carp: prone to gill rot, bacterial sepsis, enteritis, erythroderma, hepatobiliary syndrome, anchorhead gill. Focus on the city's grass carp intensive ponds.
(2) Silver carp and bighead carp: prone to bacterial sepsis, printing disease, Chinese bream disease. Focus on high-density culture ponds.
(3) Carp and crucian carp: prone to bacterial sepsis, gill rot, anchorhead gill. Focus on high-yield ponds.
2. Prevention and control measures
(1) Preventive measures
1. In high temperature weather, we must do a good job in heat prevention. The water temperature rises, the metabolism of aquatic animals is strong, and it is necessary to clean up the residual bait feces in time; maintain a high water level to waterproof the temperature is too high; the conditional fish pond is filled with new water in time, and the aerator is opened frequently to ensure that the water quality is fresh.
2. Do a good job in flood prevention measures. Regularly check whether the pond embankment is firm, whether the drainage is smooth, maintain the generator, aerator, equipped with a certain amount of chemical oxygenator; release part of the pond water before the rainstorm as a reserved water level; timely dredge the drainage ditch to avoid rainwater outside the pond from entering the pool, and flooding causes flooding or breaking the embankment.
3. Strengthen aquaculture management. Strengthen the patrol of the pond, dead fish, sick fish should be fished out immediately; in case of sudden changes in the weather should be reduced or not fed, regular supplementation of vitamins, raising grass carp should be fed as much natural feed as possible to enhance the disease resistance of fish; reasonable adjustment of pond water color, maintain high-quality water body; after heavy rain, the pond water is too turbid to sprinkle quicklime, so that the pond water becomes clear; after the disaster, it is necessary to strengthen disinfection work to prevent skin diseases.
4. Drug prevention can be mixed with feeding and feeding three yellow powder or liver protection, liver protection and other drugs. (2) Therapeutic measures
1. Bacterial sepsis, gill rot, printing disease: sprinkle with chlorine-containing lime (bleach powder) in the whole pool, 1.0g ~ 1.5g / cubic meter of water body; florfenicol mixing feeding, dosage of 10mg ~ 15mg / kg of fish, once a day, continuous serving for 3 days to 5 days.
2. Enteritis disease: mashed with garlic head to make medicinal bait containing 200g/kg of garlic feed, once a day for 3 consecutive days.
3. Anchor head bream disease, silver carp Chinese bream disease: diluted with refined dimethoate powder, the whole pool is sprinkled, counting the enemy hundred worms, 0.1g ~ 0.2g / cubic water body, octyl thiophos, ivermectin preparations can also be applied. (Source: Chongqing Aquatic Animal Disease Prevention and Control Center)