|Description:||This image depicts a plague epidemiologist in the process of spraying an insecticide into a burrow suspected of harboring animals infested with fleas carrying plague organisms in an epizootic area. The field technician was shown here holding a large pump sprayer, whose tip had been placed at the mouth of the burrow, and which was delivering flea insecticide.|
When distinct burrow systems are apparent, fleas can be controlled with a duster using 0.5% permethrin, or other EPA registered insecticidal dust. Carbaryl (Sevin) can be used, but has little residual activity, especially in wet weather. Pre-treatment flea counts, i.e., average fleas per burrow, and post-treatment counts are very important records that should be kept to determine the effectiveness of flea reduction. Additional information that should be kept includes the total poundage of insecticide used, acres treated, and approximate number of burrows per acre.