What is an effective product for fleas in sand/loam type soil?
To control fleas we emphasize on-pet treatment rather than environmental treatments. There are some excellent animal treatments for pets today including Precor, Frontline, Advantix, Capstar and many others. Treating flea infested soil is supplementary to treating the pet itself. Ironically, we have fewer really good outdoor treatment products than we did a few years ago. Permethrin or one of the other similar residual insecticides (see http://citybugs.tamu.edu/FastSheets/Ent-1046.html) which provides relatively good control, but should be used with on-animal treatments. We have a flea control publication at http://tcebookstore.org/pubinfo.cfm?pubid=1026 .