Spore worms are known as the "number one killer" of crucian carp, and the recent season of spore epidemic is caused by spore worms in many farmed ponds. Once crucian carp is infected with sporidium, it is very difficult to treat, the infection rate and mortality rate are very high, and the losses caused to farmers are huge.
In addition, when the water temperature drops after the "white dew" and the crucian carp ushers in the golden growth period of the "Golden Nine Silver Ten", there is still a peak period of spore disease onset and death. The second round of onset tends to be more secretive and devastating.
Fish just infected by spore worms, its body surface and eating have no special symptoms, it is difficult to be detected, until the body of the spore worm grows and matures, the formation of "abscess" is already in the late stage of the disease, the sick fish has been unable to treat. In addition, mature spore worms have a hard shell, and ordinary drugs often cannot penetrate and kill, which is why sporangia are difficult to kill.
●Causes of spore outbreaks ●
1. There are many types of pathogenic sporidium, with a long incubation period, complex symptoms, limited diagnosis conditions at the grass-roots level, and difficulty in diagnosing the disease. In addition, spore disease can have complications or secondary symptoms, resulting in misdiagnosis and missing the best time for treatment.
2. The treatment course required to prevent sporangiasis is long, and the farmers hold a fluke mentality, only value the immediate interests, and do not have the patience to implement the plan for preventing sporidium in place.
3, breeding management can not be in place. Do not pay attention to the work of clearing ponds, public water sources, do not pay attention to water change, water quality deterioration is the mainstay, water cross-propagation probability is large.
4. After the outbreak of sporangiasis, farmers are anxious to go to the doctor, want to achieve the effect quickly, indiscriminately use drugs, overdoses, causing drug damage, deterioration of water quality, aggravation of the disease.
●Conventional medication of spore worms ●
Most of the pesticides on aquaculture are pesticides, heavy metals, etc., which themselves contain certain toxicity, which will affect the farmed fish, causing fish to not eat, black bodies, black heads, slippery edges, convulsions, etc., which will directly poison fish. For example, in the treatment of sporidium, due to the excessive dose of chlorobenzene hydrochloride or uneven mixing, the fish eating material poisoning. And the parasites kill endlessly, repeatedly killing insects, but also the water quality is also destroyed, once the water quality is destroyed, it is easy to secondary bacterial infection.
Spore worms are known as the "number one killer" of crucian carp, which is enough to explain the harm of spore worms, and it is not easy to be killed, so it is necessary to have a preventive concept to reduce the chance of spore infection.
1. Remove too much silt at the bottom of the pond when clearing the pond, increase the amount of medication, and kill the spores at the bottom of the pond.
2. Do not introduce fish fingerlings from areas with high incidence of myxosporidium, and soak them with dimethoate and copper sulfate mixture before stocking to prevent myxosporids from entering the pond with fish species.
3. Regular use of Eucalyptus essential oil to inhibit the reproduction of spore worms and block the infection pathway of Spore worms.