Which fumigants are registered for use in rodent burrows by the USEPA and Dept of Pesticide Regulation?

Carbon dioxide and phosphine are appropriate choices for use as fumigants in rodent burrows due to their effectiveness in controlling rodent populations. Carbon dioxide is recognized for its capability to displace oxygen in confined spaces, making it lethal to rodents while minimizing environmental impact. Phosphine is also a powerful fumigant that works by releasing phosphine gas when it reacts with moisture, efficiently penetrating rodent burrows and effectively exterminating pests.

The other examples provided include substances that may have specific uses in pest control but either have restrictions, are not categorized for rodent burrow use, or are not registered for this specific application. For instance, chloropicrin and methyl bromide serve as soil fumigants and have been phased out in many applications due to their potential environmental harm. Similarly, formaldehyde and sulfuryl fluoride, while used in other types of fumigation, do not have the registration for application in rodent burrows. Ethylene oxide is frequently utilized for sterilization purposes rather than pest control and aluminum phosphide, though highly effective for certain applications, may not be favored in rodent burrow treatment scenarios. Therefore, carbon dioxide and phosphine stand out as the most viable and registered options for this specific purpose.