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笔者6月初在下乡工作中,目睹一农户,在不足0.3亩水面的鱼池里,水深1米多,投用硫酸铜250克,消灭鱼池中的青泥苔。6月4日下午投药,5日上午,死鱼浮于水面。当场在技术干部指导下,将塘水放干,除近百尾鱼及时转入新水中,得到抢救外,其余200多尾草鱼和鲤鱼被毒死,损失惨重。硫酸铜能够治青泥苔。安全使用方法是:一亩面积的水面,水深1.5米鱼池,可用硫酸铜400克,硫酸亚铁150克,两种药分开稀释充分溶解后混匀,再掺入塘水,全池均匀地泼洒即可。但使用硫酸铜对鱼苗危害大,
In early June, when I was working in the countryside, I witnessed a farmer whose water depth was more than 1 meter in a fish pond of less than 0.3 mu. It was cast with 250 grams of cupric sulfate to eliminate the algae in the pond. June 4 afternoon dosing, 5 am, dead fish floating on the water. On the spot, under the guidance of technical cadres, the ponds were drained to dryness. Except for the nearly 100-footed fish being promptly transferred to new water for rescue, the remaining 200-foot grass carp and carp were poisoned and suffered heavy losses. Copper sulfate can cure slime. Safe to use method is: acre area of water, 1.5 meters deep fish ponds available copper sulfate 400 grams, 150 grams of ferrous sulfate, the two drugs separately diluted fully dissolved after mixing, and then mixed with pond water, the whole pool evenly sprinkle Can be. However, the use of copper sulfate on fish fry hazards,