Purdue Landscape Report: Early June, we received a white pine sample at the Purdue University Plant and Pest Diagnostic Lab that showed early season needle loss lower in the tree canopy (Figure 1, 2).

Jun. 11—White pine trees in New Hampshire have been dropping needles, with state officials blaming last year's rainy late spring and summer. The state's Forest Health Bureau says there's no cause for ...

ASTORIA -- Coastal state forests are experiencing a resurgence in Swiss needle cast disease, a fungus that kills the evergreen needles on Douglas fir trees by interrupting the process of ...