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Dutch Elm Disease
Macro-Infusion General Information
Arbotect Lasts 3 growing seasons
Arbotect is a systemic fungicide that is highly resistant
to degradation and moves into new sapwood in sufficient quantity
to protect trees for 3 growing seasons.
The Purpose Is Complete Distribution
The purpose of preventive macro-infusion
with Arbotect is to provide even and complete distribution
of the fungicide throughout the 2-4 year old twigs where the
beetles feed.
Macro-infusion of Arbotect protects
Elms for 3 growing seasons from
Dutch Elm Disease. |
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The purpose of macro infusion is to evenly and completely cover the entire internal crown of the tree with enough Arbotect to keep the disease out. |
How Long It Takes
The average uptake for 20-60 gallons of fungicide solution
is 30-60 minutes if the protocol is followed closely. Trees
should be treated after the leaves have fully enlarged or
after the seeds have dropped, and the treatments can be administered
until there is fall color present in the canopy.
Arbotect Limitations
Diseased elms should NOT be treated with Arbotect. Rainbow’s
experience is that Arbotect will mask the symptoms of the
disease for 1-3 seasons before the tree dies. If your elm
is already infected with Dutch elm disease, tracing
may be a method that can be used to save the tree. Arbotect
does not prevent infections that grow through
root grafts, so in situations where this is a concern,
install a trench and wait until the following season to make
sure the tree is healthy before protecting with Arbotect.
For a detailed description of macro-infusion go to performing
the process. As a preventive treatment this process gives
highly predictable results.
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