Forest Insect and Disease Newsletter- July July 2014 In this issue: Question of the month Balsam fir needle rust Eriophyid gall mites on maple What happend to forest tent caterpillar? Spruce needle rust Yellow-headed spruce sawfly Forest tent caterpillar season - from the archives New Forest Health Specialist for Southern Minnesota Control of Oak Wilt in Bluff Country Scattered Bur Oak Mortality in Southern Minnesota Emerald Ash Borer Update in Houston County Ash Trees with Thin Crowns Eastern spruce budworm in Minnesota Archive for past issues