| Different treatments aiming to cure the grounds, which bad been contaminated by the vibrio P1 "brown-ring", have been carried out on some sites of on-growing, taking place in the Aber Benoit, in Brittany. The tested products were Lime, and an antiseptic "Agroseptil" which positive effects are admitted in pisciculture. The results (growth, survival and the presence of brown-ring), do not point out any difference between the various treatments. However, it looks as if the brownring has appeared latter than on other clam-fields located in the same area.This effect does not seem to be due to the various treatments of the soils, but to the antibiotic bath of the clams bef ore seeding. |
