Abstract
Granular systemic insecticides were tested for effectiveness In controlling Fiorinia theae Green on container-grown Camellias under greenhouse conditions. Heavily infested Plants were treated once each spring at rates equivalent to 8-64 pounds AI per acre per six-inch depth. Outstanding Control was obtained with aldicarb and DS-15647 (3.3-dimethyl-1-methylthio-2-butanone O -(methylcarbamoyl)oxime). Excellent control also was provided by dimethoate and carbofuran at high rates. Phorate provided effective control only at the highest rate tested. Disulfoton was ineffective. Increased insecticidal effectiveness was Obtained when treatments were applied during periods of Active plant growth. Visual evaluation of the colonization of new foliage by tea scale was found to be satisfactory for preliminary screening of candidate insecticides.
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