Candidate Pesticides for Quarantine Use, 1977

Abstract

Test species were laboratory reared and transported by air or automobile to the test site in Miami, Florida. There, tobacco budworms and cockroaches were exposed in 1-gal paper tubs, boll weevils and mosquitoes in plastic “squat” cups, and brown dog ticks in plastic vials. Containers for mosquitoes and ticks were covered with 6 x 7 mesh/cm2 nylon screen, and all other containers were covered with a 4 x 4 mesh/cm nylon screen. Cockroaches were tested in both nymphal and adult stages; all other test insects were adult. Cages were arrayed in the center of 71 m3 test trailers. Dusts were formulated in Hi Sil 233 and introduced from outside by propelling with CO2 through the rear doors; while aerosols, formulated with Freon or with water and propane/isobutane and EC’s, applied with a Micro-Gen Sprayer, were released by an applicator from within the trailer. The aerosols and dusts were applied at rates used currently in quarantine pesticides applications in aircraft and trailers, and the EC’s were applied at a rate of 1.1 g/100 m3 (Al). The exposure period was 10 min with doors closed and 20 min with doors open. Mortality counts were made after 24 hrs. The average temperature during exposure and holding was 25° C. Tests were replicated twice, and the values were corrected according to Abbott’s formula and averaged.