I have no knowledge of this item so I'll just throw it out there and see what happens. I found this while looking for pest control alternatives.
http://www.bugspraycart.com/equipmen...stress-glasses
They are glasses that supposedly allow you to see any trees that are under stress. The idea is they filter out the green and you can tell where the stress is. Sounds interesting for avoiding those trees that look okay but really aren't. Any body know anything about them?
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