Anchorhead bream is one of the most common and stubborn and difficult ectoparasites in fish farming. Anchorhead loach mainly attacks the surface, gills and mouth of the fish, absorbing fish body nutrients, making the fish scales rupture, tissue inflammation, emaciated, restless, loss of appetite, slow movement, and can cause explosive death of fish species in a short period of time, silver carp, bighead carp, eel, grass, eel, California perch and other freshwater fish are deeply affected. Late summer and early autumn in August is the peak growing season for anchorhead bream, and fish farming should do a good job in the prevention and control of anchorhead loach as soon as possible.
In aquaculture, once the outbreak of anchorhead bream is difficult to control, it is easy to recur repeatedly. The old insects of the anchorhead loach can generally be killed with a single drug, but in order to completely eliminate the anchorhead loach larvae and adult insects in the pond water, it must be drugd 2 to 3 times in a row, and the time of medication is longer when the water temperature rises. After the use of insecticides, anchorhead loach may automatically fall off the surface of the fish, but a large part will form sporangia to hide in the silt to avoid the toxicity of the drug, once the efficacy of the drug disappears, the water temperature is suitable, after a few days these anchorheads will multiply in large numbers and re-parasitize the surface of the fish. This is the main reason why the insects were killed once with medicine, and the anchorhead bream came back every few days.
If the repeated use of insecticides to kill anchorhead bream, such as parathrin, organophosphorus, copper sulfate and other insecticides are certain toxicity, long-term use will damage the health of the fish, resulting in less fish to eat, slow growth, but also damage the water quality caused by the lack of oxygen or poisoning death of the fish, safety hazards like a time bomb, at any time may set off a bloody rain. Repeated use of insecticides can also lead to increasing resistance to anchorhead bream, which becomes increasingly unused. Under the situation of increasingly strict market supervision, the food safety problems caused by drug residues cannot be ignored.
So, should we kill the fish pond anchorhead loach? In fact, instead of killing insects, we can also prevent insects and control insects, and strangle anchorhead loach in the cradle.
In order to effectively prevent and control the parasitism of anchor loach, one is to clear the pond before releasing seedlings, strictly disinfect and kill the insect eggs in the sediment; the second is to prevent the fish body from entering the fish body when releasing the fry; the third is to control the water quality and substrate, and the water source introduced does not bring insect eggs or larvae into the pool, keep the water quality fresh, and change the bottom diligently; the fourth is to use the essential oil of Lechang multi-bud eucalyptus for prevention and control.
Lechang, made from eucalyptus multi-bract essential oil unique to Victoria, Australia, is rich in 1,8-eucalyptus, monoterpenes, sesquiterpenes, alcohols, esters, aldehydes and ketones, and has a significant avoidance effect on parasites. Production practice has proved that in the whole process of fish farming, regular internal administration and sprinkling use of Lechang can effectively prevent and control a variety of aquatic parasites such as anchor head loach, wheel worm, ring worm, sporidium worm, etc., reduce the incidence of disease, reduce casualties. And the ingredients of eucalyptus multi-bract essential oil are all safe, non-toxic, non-irritating, no residue, will not damage the fish body, do not affect the feeding and growth of fish, and will not affect the water quality, can be used for a long time.
For anchorhead bream, don't wait until there is a large outbreak before thinking about treating it with insecticides. Although stubborn and difficult to kill, scientific management, rational use of safe and non-toxic Lechang multi-bud eucalyptus essential oil, anchor head loach is preventable and controllable. Rational use of drugs and safe deworming are more conducive to the green and sustainable development of the fish farming industry.
The source of the article is the official website of Shandong Longchang Dongbao.