The Fleming Arboretum has two large Wiliwili - one planted in 1952, th eoher in 1976. The following are notes on an every-5-month-treatment of these Wiliwili using the Merti Systemic Insecticide.
Jan 1, 2006: First sighting of Gal Wasp stings.
Jan 12, 2006: Merit injections made into large trunks bases every 6 inches.
Feb 2006: Older, larger WiliWili shows less response.
May 25, 2006: Merit injections - 6 inch intervals on all branches up to 5 feet.
June, 2006: Trees show galling but doing okay.
Nov 28, 2006: Trees dormant - Merit injection.
Dec, 2006 - Mar, 2007: Trees still dormanat - question of dormancy or Gall Wasp effects.
Apr, 2007: New growth
April15, 2007: Merit injections
May, 2007: Both Wiliwili look excellent - one with flower buds and leaves, the other full of leaves. Very few Gall stings (see photo above).