After the autumn, the temperature began to gradually decrease, during this time the small melon worm began to be extremely rampant, once the onset of the disease is currently no specific drug, the small melon worm has no obvious selectivity to the host, almost all the fish can be infected, once the infection is serious, it can lead to the explosive death of the fish, known as the first killer of aquaculture.
Small melon insects have obvious seasonality, when the water temperature begins to fluctuate, small melon insects still multiply, when the water quality is poor, the breeding density is high, and the fish body resistance is low, the small melon insects are prone to outbreak.
Small melon worms generally parasitize the gills of fish, causing the gills of the fish to swell, which affects the breathing of the fish. Because the small melon worm will destroy the epidermis and gills of the fish body, causing the loss of the fish's electrolyte, nutrients and body fluids, causing the fish to be metabolically disturbed, causing secondary infection of the body surface wound and causing the death of the fish.
Now there are more chemical drugs on the market for the treatment of small melon worms, mainly mercury nitrate, mercury acetate, malachite green, formalin, etc., but the first three due to the damage caused by drug residues in the country has been explicitly banned, and the treatment effect of several other chemical drugs is not obvious Mainly because of long-term use of parasites leading to drug resistance, so the effect is not obvious.
Now many farmers have begun to choose to use the feed in the feed regular internal administration of insect repellent fish medicine Che Jing, which can effectively control the parasite within a certain range, do not let the parasite appear a large number of outbreaks, there is no stimulation and damage to the fish body and the water body, Che Jing can directly block the transmission of small melon worm nerves and energy metabolism, affect the protein metabolism of the insect body, and make the insect body lose vitality and adhesion.