Abstract
Abstract Infested white pines (2-3 m tall) growing as a windbreak were used to evaluate efficacy of selected insecticides against bagworms. A KWH backpack mistblower operating at half throttle on setting 3 for 30 s was used to apply treatments. A flag was placed near the highest density of active bagworms for each tree: 600 ml of finished spray was applied to that 1-m2 area 13 Jul under partly cloudy skies, 26°C, and 10-16 km/h breeze. Larval head capsule width averaged 2.54 mm. Treatment effectiveness as evaluated at 7 DAT by collecting 10 bagworms from each of the 4 single-tree replicates/treatment and assessing larval mortality.
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