The temperature began to warm up, everything began to recover, and the breath of spring came to the fore. In this comfortable day, it is the beginning of the headache of breeding friends. As the temperature rises, the temperature of the water body rises, the parasites in the water begin to come alive, and the nightmare of aquaculture animals begins. There are many parasites in the water, let's first talk about the parasite with the most beautiful shape - the wheel worm.
Because of its shape similar to the shape of a wheel, it is named a wheel worm. The wheelworm has a wide range of life, with its presence in various regions and its presence in all four seasons. But the outbreak was mainly in April-August. It mainly endangers fingerlings and fry, and when seriously infected, it can cause large-scale death of diseased fish and cause great economic losses.
Wheelworms can spread in direct contact with fish bodies, swim in the water after leaving the water body, transfer the host, and can also be transmitted through aquatic organisms and tools. When a small number of wheelworms parasitize, there are no obvious symptoms, and when they are seriously infected, they are sick fish, their body color is black, their diet is poor, their physique is thin, they swim alone, and some swim wildly around the pool in groups, showing a "running horse" shape. Sometimes the surface of the fish body is white, the gill filament epithelial tissue of the fish body is hyperplasiad, the gill filament tissue is swollen or destroyed, etc., when a large number of parasitic wheelworms are generated, it seriously affects the normal breathing and activity of the gills, resulting in the fish suffocation and death.
Boss Sun of Foshan, Guangdong Province, farms 25 acres of grouper, and in 2017, just into May, boss Sun's pond saw wheelworms. At the beginning, Boss Sun used copper sulfate to kill insects, and with a certain effect, the wheel worms were significantly reduced. By June, the wheelworms were more numerous, more serious than the last time, and dozens of fish died every day. Boss Sun used copper sulfate to kill insects, and the early stage saw the effect, but after less than 10 days, the wheel worms increased again, and there was a trend that could not be controlled, and because the number of times copper sulfate was used, the water quality in the breeding pond began to deteriorate, the content of heavy metal ions in the water increased, the feeding amount of the fish began to decrease, and the dissection found that the liver of the dead fish also appeared a certain damage. In the end, a large number of deaths were caused by the excessive use of wheelworms and insecticides
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By 2018, a new type of insect repellent product attracted Boss Sun, which was made from eucalyptus an essential oil imported from Australia, called Lechang. With years of experience, Boss Sun felt that Lechang was a safe and non-toxic product that could effectively prevent and control parasites, and decided to put it into use. Boss Sun began to use Lechang in April, feeding the mixture twice a month for 5-7 days each time, and 100 grams of Lechang mixing 300-400 kg of feed. From the release of seedlings to the emergence of fish, Boss Sun has been following this plan to use Lechang to prevent and control parasites, this year, Boss Sun's fish pond in the wheel worms are almost non-existent, occasionally appeared a few did not cause illness and death, other insects are also very few.
Lechang is an efficient and safe insect repellent product, natural eucalyptus essential oil for a variety of aquatic parasites have a certain avoidance effect, regular use can effectively prevent and control wheelworms, ringworms, sporangia, anchorhead loach and other parasites. And eucalyptus essential oil is pure plant extraction, very safe, without any toxic side effects, will not cause any harm to the water body and the fish body itself, will not affect the feeding of fish, and will not make the fish resistant, do not have to take turns to use insecticides, can be assured of long-term addition.
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