I have mainly Subalpine Fir trees (Abies bifola) on my property in Western Montana. I have noticed this year that there has been some kind of resin being secreted by the trees either onto their needles (making them shiny) or onto the ground below the tree.
It’s been a particularly hot summer here with little relief or rain. This resin tends to be more noticeable on the western side of the tree which makes sense since the hottest part of the day is in the later afternoon when the sun is in the western sky so the western side of the tree gets hotter than the eastern side.
I also have a large lawn in my backyard I water frequently and that is doing well in the hot weather accept for two large (3 foot by 6 foot) patches of dead grass. Both patches are directly under fir trees and both are on the western sides of the trees. I am assuming that whatever these trees are secreting is killing the lawn in these two areas.
Is it likely that the trees are to blame for these two dead patches and is there anything I can do to combat the problem? The lawn has been getting plenty of water in these two areas and it doesn’t seem to be making any difference.