Stem injection / 'micro' injection
An insecticide is injected (via multiple small drill holes) directly into the trunk of the tree, the tree transports the chemical to the leaves where it kills the Elm Leaf Beetle and larvae.
We use a narrow diameter, slow delivery injector when the tree is naturally transporting water; when in leaf or immediatly prior to leaf set. This timing reduces the damage to the tree associated with drilling. We don't drill in winter as there is almost no natural transpiration and the force needed deliver the chemical increases the tissue damage and potential for decay.
Disadvantages - see notes on tree biology and tree injection
The primary defence mechanism for trees is the compartmentalisation of decay, or the shutting down of areas. The tree is effectively cutting off sections of themselves to try and contain the spread of disease. Every wound (drill hole) is a new section that must be cut off. Older trees are larger so they require more drill holes, also they are less successful at containing decay, particularly the movement up and down the trunk.
Phone: 03 8644 8005
ox, Casey, Lilydale,
Drilling / Injecting into trunks
© Copyright 2018 Treetec - Tree Arborist / Ecologist Melbourne | We service Victoria, NSW, SA, QLD and Tasmania for tree and ecology consulting, chainsaw courses and Occupational Health and Safety. Our local area for tree treatements such as Elm Leaf Beetle includes all areas of Melbourne and country Victoria, Dandenong Ranges, Yarra Valley, Gippsland, Shire of Yarra Ranges. Not to be confused with Treetech or Tree tech or treetec.com.au