Abstract
Abstract Choke cherry, growing along roadsides, having at least 1 active nest of eastern tent caterpillar were used to evaluate insect growth regulators (IGRs). A KWH backpack mistblower operating at 0.5 throttle at aperture setting 3 was used to deliver 600 ml of finished spray to the dominant tent and surrounding foliage in each of 3 single-tree replicates/treatment. The sky was cloudy, temperature was 24°C, and there were gusty winds of 24-32 km/h during application on 7 May when larvae were 15-30 mm long. Treatment effectiveness was evaluated 2, 5, 7, and 14 days posttreatment by visually examining each nest for condition of larvae.
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