Abstract
Abstract Vydate L alone and Vydate L with citrus oil spray (Sunspray 6N) and Vendex 50WP were compared for residual control of citrus rust mite (CRM). Tests were conducted on 30-yr-old Ruby Red grapefruit trees planted on 25 ft x 30 ft spacing. Treatments were arranged in a randomized block design with each treatment replicated on two 12-tree plots. Treatments were applied on May 15 and reapplied on Jul 14 and Oct 1 using a Lockwcod-Hardie air-blast sprayer with speed, nozzle adjustment and pressure regulated to apply 250 gal/acre. At each count date 50 fruit/replicate were randomly selected and CRM counted in a 1 cm2 lens field at 10X on the top, medium and bottom of each fruit. CRM counts were not continued after the Oct 1 spray. At harvest, 100 fruit/replicate were randomly selected and evaluated for CRM damage. Damage was expressed as percent russet, i.e. fruit with moderate to severe damage (US#2 fresh or process fruit).
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