Citrus Rust Mite (CRM) Control 1983

Treatments were replicated five times on single tree plots in three tests. An unsprayed buffer tree separated treatment trees within and between rows. Sprays were applied dilute with a hand-gun at 400 lb/in2 (ca. 10 gal per tree) for tests 1 and 2 on 27 May and 1 June and 425 lb/in2 (ca. 12 gal per tree) for test 3 on 19 July using a truck-mounted sprayer. Water pH was 6.9 in tests 1 and 2 and 6.5 in test 3. Twenty fruit were examined at random around the canopy of each sample tree at various times before and after spraying. A 1-cm2 area was examined on each of two shaded sides per fruit. The combined 2-cm2 count per fruit of living motile CRM was recorded as one observation.