ville.montreal.qc.ca/agrile CHECKLIST FOR TIME OF YEAR TO TAKE ACTION AGAINST EMERALD ASH BORERS OUTSMART EMERALD ASH BORER! Treat our ash trees well! Guide for tree pruners HOW TO DIAGNOSE THE PRESENCE OF EMERALD ASH BORERS Adult emerald ash borers are small green metallic insects that are hard to observe in the field. Ash trees attacked by emerald ash borers may show a wide variety of signs and symptoms: The D-shaped adult emergence holes (figure 1), the larvae (figure 2) and their S-shaped galleries under the bark (figure 3) make it possible to accurately confirm the presence of this insect. In fact, the most efficient detection technique consists of looking for the S-shaped galleries by removing the bark, in fine layers, from the various branches sampled at the crown of the ash trees to be tested (figure 4). 1 2 3 4 Operation Time of year Document required Pruning ash trees At any time Form for disposing of wood, if necessary Cutting down ash trees At any time Tree-cutting permit. Form for disposing of wood. Transporting ashwood September 15 – April 15 None Treatment by injection June 1 – August 31 Permit depending on the pesticide used Detection At any time None Ville de Montréal, Service des communications (05-16) 13125 Photo couvert : Wolfgang Hoffmann / AgStock
Transcript
ville.montreal.qc.ca/agrile
CheCklist for time of year to take aCtion against emerald ash borers
OUTSMART EMERALD ASH BORER! Treat our ash trees well!
Guide for tree pruners
how to diagnose the presenCe of emerald ash borers Adult emerald ash borers are small green metallic insects that are hard to observe in the field. Ash trees attacked by emerald ash borers may show a wide variety of signs and symptoms: The D-shaped adult emergence holes (figure 1), the larvae (figure 2) and their S-shaped galleries under the bark (figure 3) make it possible to accurately confirm the presence of this insect. In fact, the most efficient detection technique consists of looking for the S-shaped galleries by removing the bark, in fine layers, from the various branches sampled at the crown of the ash trees to be tested (figure 4).
1 2
3 4
operation time of year document required
pruning ash trees
At any time Form for disposing of wood, if necessary
Cutting down ash trees
At any time Tree-cutting permit. Form for disposing of wood.
transporting ashwood
September 15 – April 15
None
treatment by injection
June 1 – August 31 Permit depending on the pesticide used
detection At any time None
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disposal of ashwood waste Ashwood waste such as logs or branches is the biggest carrier in the spread of emerald ash borers. Adult emerald ash borers, which spread by flying, may emerge from ashwood starting in the late spring and all summer long.
between april 15 and september 15: • Itisprohibitedtomoveashwoodwastethathas
not been processed to destroy emerald ash borers. •Ashwoodwastemaybestoredonsiteuntilitmay
be moved. After September 15, it may be sent to a company or organization that will process it.
ash borers, after processing, may be kept and relocated (for example, lumber cut into wood planks, with woodchipping of the wood waste including the bark).
between september 15 and april 15: No later than 21 days after September 15 or after the ash tree has been cut down or pruned: • Ashwoodwastemustbeprocessedonsiteto
destroy emerald ash borers or be transported to the site of a company or organization that will transform this waste.
•Thepartsoftheashwoodthathavenoborers,
after processing, may be kept and relocated. Please note: At no time may ashwood be kept as firewood.
treating ash trees to proteCt them against emerald ash borers There are a number of approved pesticides on the market to control emerald ash borers. Ville de Montréal uses TreeAzin. This pesticide, whose effectiveness has been scientifically proven, has very low toxicity for the environment. Under the municipal by-law, no permit is necessary to use it, contrary to the other products on the market. Since emerald ash borers may be found all over the island of Montréal, it is preferable to have ash trees treated as quickly as possible. When an ash tree starts to show symptoms of infestation such as withering, the treatments are generally ineffective.
treatment of ash trees in high-risk areas Every year, Ville de Montréal carries out thousands of detection operations. These operations help determine the areas where ash trees are the most likely to be attacked by emerald ash borers. All healthy or slightly withering ash trees located in these areas must be treated and this must be done every year, between June 1 and August 31. Certain exceptions apply. The owners of ash trees located within these areas may be eligible for financial assistance covering part of the treatment costs.
help us fight emerald ash borers! Emerald ash borers are jeopardizing the survival of ash trees on the island of Montréal. If nothing is done, thousands of ash trees will have to be cut down over the next few years. In order to slow down the infestation of these destructive insects and reduce the number of ash trees that will otherwise die on its territory, Ville de Montréal and its partners have adopted a by-law to fight this insect. Your cooperation is essential to its success!
Cutting down and pruning ash trees Under the current municipal by-law, if more than 30 % of an ash tree’s branches are dead, the tree must be cut down no later than December 31 of the current year. An owner wanting to have an ash tree cut down on his property must first obtain a permit. This permit is required for ash trees 15 cm in diameter or more. It takes a certain amount of time before a permit is issued, because an inspector must examine the tree. Ash trees may be pruned or cut down at any time of year. However, it is important to comply with the restrictions on moving and disposing of ashwood.
