Abstract
Abstract Efficacy of selected treatments for controlling pine spittlebug was evaluated in a Christmas tree plantation. A KWH backpack mistblower operating at a high rpm was used to deliver ca. 200 ml of finished spray to a quarter radial section of the crown of each of four, single-tree replicates per treatment on 14 June with sunny skies at 31°C, and a slight breeze (0 to 8 kph). Each sprayed section contained at least one spittle mass that was flagged for later observation. Treatment effectiveness was determined 23 June by inspecting the flagged areas of twigs for spittle masses. Dimilin treatments were observed a second time on 30 June.
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