Which class of pesticides is generally considered the most toxic?

Fumigants are indeed generally considered to be among the most toxic classes of pesticides. The reason for this high toxicity is primarily due to their gaseous state and the manner in which they are applied. Fumigants are used to infiltrate structures or soil, and they can penetrate various materials, allowing for effective pest control. However, this same feature makes them potentially very hazardous to humans and non-target organisms.

Fumigants can affect the respiratory system and may cause neurological damage upon exposure. Their application typically requires stringent safety measures and protective equipment due to the risk they pose. This class includes chemicals like methyl bromide and phosphine, which are known for their high efficacy against a wide range of pests but also for their significant health risks.

Other pesticide classes, while also potentially toxic, generally have lower acute toxicity levels or more established handling protocols that mitigate risk. Understanding the properties and risks associated with different classes of pesticides is crucial for safe and effective pest management.