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Stem injection of a systemic insecticide to control Uraba lugens on urban Lophostemon confertus trees.
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Abstract
Uraba lugens Walker (Lepidoptera: Nolidae) has the potential to become a serious pest of susceptible forestry and urban trees in New Zealand. Stem injection of insecticides provides a method for the control of U. lugens in public locations where foliar applications are not suitable. Field and laboratory studies were conducted in 2009 and 2010 to determine a dose response profile of U. lugens larvae to acephate injected at 0.0, 0.25, 0.50 and 1.00 g cm(-1) tree diameter measured at breast height (dbh). The concentration of the injected solution varied across years.