What pesticide is used to kill wild trash fish when clearing a fish pond
Today's science and technology can be said to be developing rapidly, and many pesticides have been developed along with it. The use of pesticides can greatly increase crop yields. Of course, pesticides also have some other uses, and some friends will use them to poison unwanted fish and so on, so what pesticide is used to poison fish?
1. What pesticide is used to poison fish
Pesticides are generally effective against fish, but those with low toxicity to humans include rotenone, fenpropathrin and so on, and these pesticides generally only damage the nervous system of fish. When a solution of rotenone at a lethal concentration (0.025mg/L) is put into the water, the fish will quickly float to the surface; if they are transferred in time and placed into a methylene salt solution at a concentration of 5--10mg/L, these fish will immediately recover their vitality. By applying this characteristic of rotenone, high-quality ornamental fish can be caught.
However, fish that have been poisoned with pesticides are best not eaten. Even pesticides that are harmless to humans will leave residues in the fish's body, and eating too much will still cause harm to the human body. If you just want to eat fish, it is recommended to use fishing or netting. In addition, poisoning fish in someone else's fish pond is an illegal act, so everyone should not try it lightly.
2. The harm of pesticides
According to a comprehensive evaluation of the toxicity of pesticides commonly used in agricultural production, pesticides are divided into three categories: highly toxic, moderately toxic and low toxic. Long-term consumption of contaminated vegetables is an important cause of diseases such as cancer, arteriosclerosis, cardiovascular disease and fetal malformation. When buying melons, fruits and vegetables, everyone had better choose green, pollution-free food.
In addition, pesticides can also cause environmental pollution, pollute the atmosphere and water environment, cause soil hardening; enhance the resistance of pathogens and pests to pesticides; hinder the deep penetration of plant roots and the absorption of soil moisture; poison animals and cause a series of other problems. We must use pesticides cautiously and accelerate the transformation and upgrading of pesticide enterprises.
That is all for pesticides. Everyone must never abuse pesticides. No matter what harm it causes to yourself or others, it may be a lifetime regret. Many pesticides today also have no specific antidote, and only symptomatic treatment can be given, and the cure rate cannot be guaranteed.