Must strictly follow shrimp farming processes and techniques

(Baonghean.vn) -Recently, shrimp farmers in the three localities of Nghi Loc, Quynh Luu and Vinh City are facing an epidemic, when nearly 200 hectares of shrimp ponds died en masse for unknown reasons. To save the shrimp from this tragic situation, there is still no radical solution.

Mr. Hoang Hoai Thanh in Nghi Yen, Nghi Loc sadly said: Never before have so many shrimp died like this. My family has 0.7 hectares of shrimp pond, raised for over 30 days, then suddenly about 75% of the shrimp died and sank to the bottom of the pond. Wading down to the pond to scoop up each handful of dead shrimp is really heartbreaking, all the money invested in this shrimp pond has gone to waste. The initial damage is estimated at nearly 100 million VND, the cost of shrimp seeds alone is nearly 30 million VND. If this crop is successful, the revenue will be about 500 - 700 million VND. Mr. Thanh added: Currently, all the dead shrimp have been scooped out of the entire pond area, we are focusing on renovating the pond to continue raising shrimp but we are still afraid of disease, if we borrow money and "dump" it on the shrimp pond and fail again, we may go bankrupt.

It is known that Nghi Yen commune (Nghi Loc) has over 15 hectares of shrimp ponds, over 80% of which have died, but only about 20% of the area has been supported with chlorine chemical treatment. People are looking forward to receiving support at the same time to treat shrimp ponds simultaneously to eliminate disease pathogens.

In the province, there are 3 localities: Vinh City, Nghi Loc, Quynh Luu with mass shrimp deaths on an area of ​​193.3 hectares. The most concentrated is Quynh Luu district (over 100 hectares) including the communes: Quynh Xuan, Quynh Thuan, Quynh Loc, Quynh Di, Quynh Lap, Quynh Ngoc, An Hoa, Trinh Mon... The time the disease appears is when the shrimp are 9 - 50 days old and the cause of the disease has not been determined. Through inspection, when the shrimp are sick, they show signs of soft hepatopancreas, pale color, swollen liver, ruptured hepatopancreas, and some ponds die quickly within 1 - 2 days. The main source of shrimp seeds is Viet Uc, Vina, UP, SP, Van Tuy, Nam Mien Trung... Although it is the shrimp release season, farmers all strictly follow the crop schedule.

Shrimp pond in Quynh Thuan - Quynh Luu

Faced with the above situation, to control the disease in farmed shrimp, the Department of Agriculture and Rural Development recently held a conference to improve the management of shrimp farming areas and discuss solutions. For shrimp farming areas with diseases: when shrimp in the pond show abnormal signs, or are suspected of being sick, it is necessary to immediately report to the commune veterinary officer, community group, take samples for testing to promptly have a treatment plan. For shrimp that reach commercial size (100 whiteleg shrimp/kg, 60 black tiger shrimp/kg), harvest to avoid damage, the transportation process must be disinfected. After harvest, the diseased farming area must be treated with permitted chemicals. Close the water supply and drainage sluices to prevent water from leaking out of the pond, the treatment time for soaking in fresh water in the pond is 15 - 20 days. Farmers need to monitor the disease developments in neighboring farming areas. Choose shrimp seeds with clear quality and origin, before stocking, they must be quarantined, the stocking density is from 50 - 60 shrimp/m2 for whiteleg shrimp, 10 - 15 shrimp/m2 for black tiger shrimp. For shrimp farming facilities and households that do not have the technical and economic conditions to continue farming, they can stock other species such as monosex tilapia, sea bass... to limit diseases in the next crop of shrimp.

For areas where shrimp larvae have not been released, ponds must be treated according to the correct procedures and techniques before being placed in shrimp ponds with chlorine at a concentration of 30 ppm/m3 of water. Before being released, shrimp larvae must be tested for white spot virus, taura, MBV, and luminescence must meet the requirements before being released. For areas where shrimp larvae have been released, due to erratic weather, farmers must regularly check the water environment in the pond, use biological products, add vitamin C to the feed and increase the resistance of farmed shrimp; spread lime powder around the pond banks to prevent intermediate hosts from outside from entering the pond.

Coordinate with agencies from the province to the local level to strengthen inspection and supervision of shrimp seed production and trading establishments and farming areas. Strengthen environmental and disease monitoring and warning for farming areas. Strictly inspect, control, test and quarantine the quality of seeds and farming areas.

Van Truong