A longtime rural resident, I use my 60 plus years of life learning to opinionate here and elsewhere on the “interweb” on everything from politics to environmental issues. A believer in reasonable discourse rather than unhelpful attacks I try to give positive input to the blogesphere, so feel free to comment upon rural issues or anything else posted here. But don’t be surprised if you comments get zapped if you are not polite in your replys.

Tuesday, August 19, 2014

The Emerald Ash Borer

From Bayshore News “The Emerald Ash Borer continues to migrate north, now the infestation is reported in Kincardine. Officials say they have received confirmation that the destructive bug has reached the community.
In a news release, town officials say the response plan will address the removal of infected trees on municipal land that may present a hazard to public safety or property.”

This is not the first report of EAB in Grey Bruce but does show that it is becoming more prevalant in the area. Whilst previously efforts were made to 'control' the spresd of the pest by removing all ash trees under municipal areas is has become evident that the spread CANNOT BE STOPPED and that the removal of trees is simply for safety and liability purposes. Also efforts were made when they were first found in southern Ontario to restrict the movement of firewood and lumber from infected areas to non infected areas, such restrictions still exist but in that the 'control area' now encompasses all of Ontario north to Sudbury and beyond it is not a consideration for the average landowner in Grey Bruce.

In that this insect has been a problem in many northern states for many years there is quite a bit of information available but there are NO METHODS TO CONTROL it. I have been unable to find any information as to if it effects young regrowth saplings except that “the female lays numerous eggs in bark crevices and between layers of bark” so presumably until the tree is mature enough for such crevices exist they will not lay their eggs in then. However it is noted that they will kill a tree “before it is mature enough to produce seed” so long term they could eradicate the ash tree in North America.

As a landowner with 1000s of ash trees in my bush and millions more on surrounding properties what can I do about it all? Nothing except keep my head up when working or hiking in the bush. I will be trying to select ash trees, particularly those showing signs of dieback, for firewood rather than other species and leaving the Maple, Cherry and other unaffected trees to fill in but given the amount of ash regrowth it will be beyond my lifetime before it makes any significant impact in my bush.

All that said here is a little information from various sites giving details on the Emerald Ash Borer:-
The adult emerald ash borer emerges May - July and the female lays numerous eggs in bark crevices and between layers of bark.
The eggs hatch in 7-10 days into larvae which bore into the tree where they chew the inner bark and phloem creating winding galleries as they feed. This cuts off the flow of water and nutrients in the tree, thereby causing the tree's dieback and death.

Signs & Symptoms of EAB
The most visible sign of infestation is crown dieback. Branches at the top of the crown will die and more branches will die in subsequent years. As the tree declines, ‘suckers’, or new young branches, will sprout from the base of the tree and on the trunk.
The bark may also split vertically and woodpeckers may feed on the beetle leaving visible damage on the bark. Successful treatments with insecticides are limited but continue to be studied. All ash trees near any new infestation will most likely become infested and die.
Adult beetles emerging from trees will leave a unique “D” shaped exit hole. This is a small 1/8 inch diameter distinctly “D” shaped hole that may appear anywhere on the trunk or upper branches.
Follow this link for some good pictures of the life cycle of the EAB and some of the damage it does.

As of today, most of the areas currently regulated to control Emerald Ash Borer (EAB) in Ontario and Quebec are now consolidated into one large regulated area. This will enable authorities to better protect Canada's forests by focusing on preventing EAB from spreading into new parts of Canada.
It is prohibited to move firewood of all species, as well as ash trees, ash nursery stock or ash wood (including wood chips, wood packaging or dunnage), out of this area without written permission from the Canadian Food Inspection Agency (CFIA). These materials could be infested and spread EAB. Moving these materials from the regulated area without permission could lead to fines and/or prosecution.

Infested ash trees become extremely porous and are at risk of breaking or falling, posing a danger to residents, adjacent buildings, vehicles and property. For landowners, businesses or municipalities who have prized ash trees, the inoculation treatment is a natural, biological compound called TreeAzin which degrades naturally in the tree tissues.
Prices for the treatment vary according to the tree size as well as outside conditions such as temperature, wind speed and the level of humidity.  Prices can vary between $100 - $500.  The process must be done between June and mid-August and must be repeated every 2 years for full effectiveness.

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