Causes and Treatment Methods of Koi Carp Gill Rot Disease
Symptoms of gill disease (1) Commonly known as "open skylight", the gill filaments rot and carry mud; in severe cases, the cartilage at the ends of the gill filaments is exposed, the inner epidermis of the operculum is congested, and the central epidermis is often corroded into a round transparent small hole. (2) Gill mold disease caused by fungi: the gills of diseased fish appear pale...
(1) Commonly known as "open skylight", the gill filaments rot and carry mud; in severe cases, the cartilage at the ends of the gill filaments is exposed, the inner epidermis of the operculum is congested, and the central epidermis is often corroded into a round transparent small hole.
(2) Gill mold disease caused by fungi: the gills of diseased fish appear pale white, sometimes with pinpoint congestion or bleeding. This disease often causes explosive death of fish, and microscopic examination will reveal gill mold hyphae.
CausesKoiThe main causes of gill rot disease are three:
① Bacteria: bacterial gill rot disease caused by Myxococcus piscicola,
② Fungi: gill mold disease caused by gill mold,
(1) Chloramine-T or dibromohydantoin 0.3×10 6 broadcast over the whole pond, repeat once the next day for severe cases, and at the same time feed with Yufuning, allicin, and Yuxueting mixed into feed at a ratio of 0.2% for 3 6
days.
(2) 0.25 ×10-6 super iodine quaternary ammonium drugs broadcast over the whole pond.
(3) 1×10-6 bleaching powder broadcast over the whole pond.
(4) Soak with 0.5 grams of salt water combined with 20 ×10 6 red toxin.
( 5 ) 1×10 6 povidone iodine broadcast over the whole pond.
① Due to the massive reproduction of parasitic protozoa , the fish gills are stimulated to produce large amounts of mucus , making it difficult for koi to breathe, so the floating-head time is relatively long; in severe cases, the body color turns black, and they swim alone away from the group,
floating on the water surface,
④ Gill disease caused by Chinese flea, the ends of the gill filaments are swollen and white, with many parasites attached and maggot-like worm bodies hanging on them, hence the name “gill maggot disease”
( 1 ) Sprinkle with strong insecticide or fungus-insect killer, at a concentration of 0.01×10-6 ~ 0.02 ×10-5.
(2) Oral administration of Yujing Chongke, fed continuously 2 times. Each 50 kg of feed is mixed with 200 grams of medicine.
(3) Sprinkle with compound synergistic trichlorfon at 150 grams per mu.