Q: Drought was stated as what caused the trees' death, only dying pine trees were pictured. No mention of the boring insects that kill pine trees, was that omission intentional? No pictures of dying deciduous trees either. I have seen dead pine trees in peoples' yards where their lawn is nice and green - they water the lawn and trees - yet the tree is dead. Is drought or boring insects the reason for so many dead pine trees in Lane County?
Q: I'm putting cardboard and chipped wood over much of my backyard to keep the weeds down. How much room should I leave free of cardboard around the trees (one planted only a year ago) so they get enough water (whether mine or rain)? Would it be OK/better to put the chipped wood around the trees but no cardboard? how close to the trunk should I get if I do that?