Japanese Euonymus, Euonymus Scale Control, 1979

Thirty-nine, 3 ft tall, field grown Japanese euonymus heavily infested with euonymus scale, were selected for treatment. Test plants were growing in a single row spaced at 3 ft intervals. Test materials were applied Jun 26, Jul 10 and 24. The-foliage of all plants was sprayed to runoff using compressed air sprayers. Treatments were replicated 3 times, 1 plant constituting a replication. Efficacy of the treatments was determined Aug 21 by examining 50 adult female euonymus scales per plant. Mortality counts were made with the use of a stereomicroscope by examining each scale insect and scoring it as living if normally colored and fullbodied or dead if discolored and shriveled or dried.