烟叶中的有机成份非常复杂，目前在防治鱼病中起作用的一般被认为有尼古丁和焦油等有效成份。用烟叶治疗鱼病的好处是：门）原料易得我国烟草资源丰富，随处可得，十分方便。门）价格低廉用以治疗鱼病，亩成本仅需2元，其费用是使用晶体敌百虫的十分之一、强氯精的六分之一、B The organic content of tobacco leaves is very complicated. At present, the active ingredients that play a role in the prevention and treatment of fish diseases are generally considered to be effective ingredients such as nicotine and tar. The advantages of using tobacco leaf treatment of fish diseases are: door) raw materials easy to get rich in tobacco resources in our country, readily available, very convenient. Door) low price for the treatment of fish disease, mu cost only 2 yuan, the cost is the use of crystal one-tenth of trichlorfon, one sixth of strong chlorine, B