Citrus Rust Mite (CRM) Efficacy Trials in Florida, 1990

Treatments were replicated 4 times on 0.33 acre plots. Sprays were applied with an FMC airblast sprayer in 350 gal/acre on 24 Jul. The spray water pH was 5.0. All treatments included FC-435-66 petroleum oil or metallic copper at recommended rates for greasy spot control. The temperature during spraying was from 80°F to 94°F and the relative humidity was from 91%-55%. The wind was less than 5 mph with no rain in the area during or immediately after application. Twenty-five fruit were examined around the canopy of 2 randomly selected trees in each of 4 replicates. A 1 cm2 area was examined on each of 2 shaded sides/fruit. The 2 observations/fruit were combined and recorded as one observation.