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UMass Extension Landscape, Nursery & Urban Forestry Program

The UMass Extension Landscape, Nursery and Urban Forestry Program helps to educate landscape, nursery and turf professionals by providing programs and research-based information on the best horticultural practices and technology for environmental stewardship in nursery and landscape management.

Dieback of Eastern White Pine: Pathogens, Pests and a Changing Climate
Eastern white pine (Pinus strobus)

Eastern white pine (Pinus strobus) is one of the most economically valuable and ecologically important forest trees in the northeast. It is also an abundant landscape tree. In recent years, white pines in the region have exhibited symptoms of decline, which include: yellowing/browning needles, premature needle shedding, thinning canopies, undersized shoots and needles, resinosis, branch dieback and death.  Read more about eastern white pine health issues at

Premature Drop of Acorns
White oak leaf and acorns

Have you recently experienced premature acorn drop on oaks? While this can be caused by environmental stress, it is also possible that a tiny gall wasp is responsible. For more details, go to the INSECTS section of the August 9th Landscape Message.