Conventional knowledge of pesticides

The pesticides mentioned here should actually be divided into rodenticide and pesticides used to kill insects in our daily life. The rodenticide we use generally uses the second generation anticoagulant, and its main mechanism is to destroy the hematopoietic mechanism of rats, leading to internal bleeding and death of rats. Compared with the traditional highly toxic rodenticide, the second generation anticoagulant has the following characteristics:

1. Safe. The second-generation anticoagulant has a long action time, and once an accident occurs, it takes a long time to treat; Moreover, the second-generation anticoagulant such as bromadiolone and other special antidote is vitamin K 1, which is relatively easy to obtain. Unlike tetramine and other highly toxic rodenticides, which take effect quickly, eating accidents leave us with short reaction time and no specific antidote, which is easy to cause personal injury and death.

2. Good palatability. The new rat bait has good palatability to mice, and it is not easy to cause them to refuse to eat, thus ensuring the effect of poisoning mice.

3. Good killing effect. The killing effect mentioned here is mainly aimed at the new avoidance reaction of mice. Rats are suspicious. When they encounter new things or food, they often take some tentative measures, such as feeding them in small quantities or feeding them first by the old and weak groups. Other members of the population will determine whether it is safe according to the results of these exploration behaviors. Therefore, highly toxic rodenticide often achieved certain results at the beginning, and then the effect went from bad to worse. The reason is very simple: the mice that ate the rat bait passed on the "dangerous" information to other members, causing reactions such as refusing to eat and avoiding, and the result of poor results in the later period is logical. However, due to the long incubation period (usually 5 ~ 7 days), the second generation anticoagulant often gives mice a "safe" false information, so it is easy to achieve long-term, stable and effective rodent control effect. In regular PMP companies, the pesticides used are generally pyrethroids, such as cypermethrin and cypermethrin. Compared with dichlorvos, thiophosphate, dimethoate and other organophosphorus drugs, these drugs have the advantages of safety, little toxic and side effects, easy degradation and little impact on the environment and human body itself. At the same time, regular PMP companies will try to use physical methods or biological agents in some places where pyrethroids are not suitable, instead of simply using organophosphorus drugs to reduce chemical pollution in the process of pest control.