what insecticide can i control witchetty grubs in acacia trees with.
I have black cockatoos attacking my black acacia trees real badly( like chopping them down. ) Trees looking very poorly before hand and now suspect they are infested with Witchetty grubs. Which insecticide can I feed the trees ?
Thank you for contacting Yates.
The tree could be infested by borers. Unfortunately, as yet we don't have a product that is registered to treat borers in trees. To reduce and prevent borer infestation, we recommend improving the health of the plant and try to prune the stems/branches that are infested where possible. You could also make a lance out of a metal coat hanger and lance the borers down the hole/s, however, this is a rather crude form of control. Arborists may also be able to further assist you with advanced trees as they may have access to products for chemical control.
Answered: 11 Nov, 2020