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20 0 0年 4月研究了斜带石斑 Epinepheluscoioides寄生拟合片盘虫Pseudorhabdosynochusepinepheli的防治方法。海水福尔马林对拟合盘虫的作用表现为 :2 5min处理的半致死浓度为 2 5 0× 10 - 6 ,5 0min处理的半致死浓度为 5 0× 10 - 6 。淡水福尔马林的效果为 :3min的半致死浓度为 83× 10 - 6 ,纯淡水处理的半致死时间为 2 1min。海水福尔马林对斜带石斑的毒性表现为 :30min和 4 5min的半致死浓度分别为 94 0× 10 - 6 和 6 4 5× 10 - 6 。淡水福尔马林对斜带石斑的毒性表现为 :5min和 10min的半致死浓度分别为 130 0× 10 - 6 和 5 0 0× 10 - 6 。福尔马林处理海水中的斜带石斑半致死浓度介于 6 0 0× 10 - 6 ～ 10 0 0× 10 - 6 ,淡水处理对斜带石斑半致死浓度介于 95× 10 - 6 ～ 115×10 - 6 。淡水中斜带石斑的半麻醉和半致死时间分别为 95min和 115min。以上结果表明 :海水和淡水福尔马林对石斑拟合片盘虫的致死浓度 ,处于斜带石斑的安全范围之内。
In April 2004, we studied the control methods of Pseudorhabdosynochusepinepheli parasitized by Epinepheluscoioides. The effect of formalin on sea cucumber was as follows: the lethal concentration at 25 min was 250 × 10 -6, and the semi-lethal concentration at 50 min was 50 × 10 -6. The effect of fresh water formalin is: the lethal concentration is 83 × 10-6 in 3min, the lethal time in pure fresh water is 21min. The toxicity of seawater formalin to stomatal spot was as follows: the lethal concentrations at 30 min and 45 min were 94 0 × 10 -6 and 6 4 5 × 10 -6, respectively. The toxicity of formalin to freshwater plaque was as follows: the lethal concentrations at 5 min and 10 min were 130 × 10 -6 and 500 × 10 -6, respectively. The semi-lethal concentrations of slabstone in formalin-treated seawater ranged from 600 × 10-6 to 10 × 10-6, and the semi-lethal concentration of freshwater treatment to the slant band was 95 × 10-6 ~ 115 × 10 - 6. The semi-lethal and semi-lethal time of freshwater midribs was 95 min and 115 min, respectively. The above results show that the lethal concentration of formalin on sea cucumber and freshwater fitted plaquechiasis is within the safe range of stomatal banding.