| Abstrakt: |
All Anastrepha suspense (Loew) exposed for 1 hour in tractor-trailers and aircraft to 5- to 6-hour-old residues of micronized dusts (1 or 2 g/1000 ft2) containing resmethrin, bromophos, chlorpyrifos, fenitrothion, fenthion, or Mobam® (benzo[b]thien-4-yl methylcarbamate), or to combinations, some of which contained d-trans allethrin, were dead within 24 hours. These dust also produced 100% mortality within 24 hours when the insects were exposed for ½ hour at the time of application. Other dusts produced 90% or higher knockdown in both types of exposure and were more effective than the standard, DDT + carbaryl. Aerosol formulations of d-trans allethrin (11% at rates of 30 and 10 g/1000 ft3) and of resmethrin (7.5% at a rate of 30 g) caused better than 80% knockdown in ½ hour and 99% mortality in 24 hours; however, residues of resmethrin aerosol delivered at a rate of 10 g/1000 ft3, though it produced 99–100% mortality in 24 hours in both the tractor trailers and the aircraft, had a knockdown at ½ hour of only 63–69%. |
