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Interesting last sentence...anecdotally I would say yes. I have injected several very large trees that have lots of old wounds from pruning (good and bad) and injuries. I would say just on my observation that it took two seasons for the treatment to become effective. Either that, or the...

Mender...have those trees been injected previously or is this the first time?

Thanks JD...I'm dealing mainly with Elms for leaf beetle. I have seen the bark lift when injecting smaller trees. The old knarly ones seem to handle it better.

Thanks for that Nick. The Wedgle system came with a specific tool for making hole in conifers and a needle tip with more holes...have not had the chance to use is on any conifers yet so can't comment to its efficiency on them. Most of my work is/will be elm beetle, and so far, so good with the...

I agree with your sentiments Nick, but yeah sometimes the chemicals have to come out! Why do you favour the Arborjet? I'm Always looking for new perspectives...

I've just started doing tree injections for elm leaf beetle, I'm using a Wedgle direct inject system. Its taking a little while to know when is the best time and how to use the equipment for best effect. I like to use trunk injections over soil injection for specimen trees with lots of...