Abstract
Abstract Eight treatments were applied to evaluate control of pine needle scale nymphs on moderately infested 8-12 ft Scotch pine Christmas trees. Each treatment was applied on 8 May and replicated 4 times in a randomized complete block design. Foliar treatments were completed by using a Solo Master 412 mistblower. Treatments were applied at the rate of 100 gal/acre (302 ml/tree). At treatment time, the following conditions existed: air temperature, 74—76°F; water pH, 5.0; and skies were partly cloudy. At 15 DAT, at least 5 infested needle fascicles were removed randomly from each tree at each of 4 cardinal locations. Fascicles were then individually placed in plastic bags and transported in an ice cooler to the laboratory, where the viability of the first 100 nymphs (at each cardinal location) observed under a stereo dissecting microscope was determined. Counts were always made from a minimum of 5 fasciles. A total of 400 nymphs were examined from each replicate.
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