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我县1990年夏秋之际,干旱天气持续50多天,有时气温高达37～38℃,致使一部分乡村鱼病盛发,不少养鱼户按照常规的方法防治鱼病,其效果没有达到预期的目的,甚至引起大批死鱼。这说明在高温阶段防治鱼病不能按照常规方法和浓度施药,因为常规用药安全浓度一般是在水温22～26℃范围内实验的极限数据,随着水温的升高、理化因子的变化,有些药物毒性减弱,有些药物毒性加剧,为了总结经验教训,本人将高温季节防治鱼病的注意事项介绍如下:
During the summer and autumn of 1990 in our county, the dry weather lasted for more than 50 days and sometimes the temperature was as high as 37-38 ℃, causing some rural fish diseases to flourish. Many fish farmers did not have the fish diseases in accordance with the conventional methods, and their effects did not reach the expected Purpose, and even cause a large number of dead fish. This shows that in the hot stage of prevention and treatment of fish disease can not be applied in accordance with conventional methods and concentrations of conventional drug safety concentrations are generally in the water temperature range of 22 ~ 26 ℃ experimental limit data, as the water temperature, physical and chemical changes, some Drug toxicity weakened, some drug toxicity increased, in order to summarize the lessons learned, I will hot season prevention fish disease precautions described below: