What is the first killer of mariculture? There is no doubt that it is a small melon worm in the seawater! In marine fish farming, once the outbreak of small melon worm disease, within a few days, the entire marine area of the fish row cages face the disaster. Especially around the Mid-Autumn Festival, the temperature is getting cooler and cooler every day, coupled with the frequent visits of typhoons, it is the period when the seawater melon insects are active, which seriously endangers the grouper, yellow croaker, golden pomfret and so on cultivated along the southern coast of China.
Seawater melon insects are greatly affected by water temperature, at a temperature of about 25 ° C, reproduction is very fast, 1 adult worm can split and reproduce more than 1000 larvae in one night. This breeding rate is quite frightening, which is one of the reasons why the seawater melon worm is not easy to treat. In addition, most of the marine fish are cage cultured, and the large water area also creates opportunities for small melon worms. When the skin and gills of marine fish appear small white spots, slow eating, roaming on the surface of the water and other symptoms can be initially diagnosed as small melon worms.
So far, there is no drug that can kill seawater melon insects at one time. Small melon worms are like the cancer of fish, so many farmers say: once the fish is infected with seawater melon worm disease, no matter what insecticide is used, it is basically ineffective. The lesson of countless fish farmers with blood warns us that the most important thing for small melon worm disease is to do a good job in advance to prevent and control it, in order to reduce the incidence of disease and reduce losses.
1, the breeding density is too large to increase the incidence of small melon insects, accelerate the rate of reproduction, marine aquaculture grouper, yellow croaker, golden pomfret, etc. should be reasonably controlled density, can reduce the incidence of small melon insects.
2, the occurrence of diseases and the decline of fish physique can not be separated from the relationship, in the breeding to regularly feed to enhance the body's immunity, improve the physique of health care products, especially when the fish feed slows down to pay attention to.
3. Regularly use safe, non-toxic and non-irritating insect repellent products from the release of seedlings. Do not blindly use insecticides, most insecticides can not kill small melon insects, and frequent use of insecticides will damage the liver and pancreas of fish and cause a decrease in immunity.
Lechang multi-bract eucalyptus essential oil, derived from the unique multi-bract eucalyptus tree in Victoria, Australia, rich in 1,8-eucalyptus, monoterpenes, sesquiterpenes and other plant deworming ingredients, a variety of components work together, can effectively inhibit the growth and reproduction of seawater melon insects, reduce the incidence of small melon insects. Eucalyptus essential oil is included in the EU feed additive catalogue of plant essential oils, mixing internal administration and water body splash will not damage and stimulate the fish body, do not affect the feeding and growth of fish, nor will it pollute the water quality.
Autumn is a high incidence of small and medium-sized melon worm disease in marine fish farming, and prevention can be done in advance to reduce losses. Lechang multi-bud eucalyptus essential oil, natural insect repellent, reduce the incidence of small melon insect disease, non-toxic and harmless to fish, no irritation, you are worth a try!
The source of the article is the official website of Shandong Longchang Dongbao.