How is the white mouth of Penaeus vannamei caused?

A boss of Shuangzao Village, Yangkou Town, Rudong County, Nantong City, Jiangsu Province, raises shrimp in a 52-meter greenhouse. In March this year, after the shrimp was put into the water, there was a phenomenon of "white mouth", with dirty body, poor constitution and no vitality. There is basically no algae in the water, and the bottom is dirty.

Check the situation of the day:

Area: 52m shed

Water depth: 0.4m

Weather: sunny, 10- 19℃

Water temperature: 19℃

PH value: 8.4

Transparency: 40, no impurities in water.

Ammonia nitrogen and nitrite are normal.

Treatment plan:

On the first morning, use 3 kg EDTA3+250ml/ Kang Run/shed, and spray evenly in the whole pool.

The next day, Shu Ning+Golden Cover+Champion Treasure (two sheds in each group) splashed the pool evenly.

Use effect:

On the third morning, observe the water quality: pH: 8.4, transparency: 40, and the water quality is free of impurities.

Observation on the third night: the vitality of shrimp is obviously improved, the white mouth is obviously reduced, and the body is not dirty.

Cause analysis:

"White mouth" is generally caused by the poor physique of shrimp seedlings, and the physical problems of shrimp seedlings are generally accompanied by sediment and water quality problems. There are many impurities in the water, mild poisoning and excessive heavy metals. Among them, oral parasites are prone to appear, commonly known as "white mouth".