Three Major Threats Devastating MA Trees

Massachusetts forests are currently battling three significant emerging threats that are causing widespread tree damage. The emerald ash borer, an invasive insect first detected in the state in 2012, is a primary concern. This metallic green beetle bores into ash trees, with its larvae destroying the trees from the inside. State officials are working with the U.S. Department of Agriculture to control their spread using non-stinging wasps, though these are currently in limited supply.

Another pressing issue is beech leaf disease, which affects beech trees. This disease is caused by microscopic nematodes, believed to be related to Japanese nematodes, attacking leaf buds during winter. Infected leaves develop dark streaks, preventing photosynthesis and ultimately killing the tree. While forest-wide prevention is difficult, property owners can use potassium phosphate spray or commercial sprays, though the latter are expensive and toxic.

The third major threat is the white pine needle damage complex, which has become widespread since 2009. This issue is attributed to native fungal species, with climate change acting as a contributing factor through warmer temperatures and intense rainstorms. The fungi cause premature death of white pine needles, hindering photosynthesis and weakening the trees. Property owners are advised to thin dense white pine stands to improve airflow and sunlight exposure.