Forest Insect and Disease Conditions in the Southwestern Region, 2007

摘要

The year 2007 was notable for major defoliation events in the forests of New Mexico and Arizona. Western spruce budworm activity expanded, new outbreaks of Douglas-fir tussock moth were reported, a fungal needle-cast affected pinon throughout much of southern New Mexico, and severe looper damage occurred near the Village of Cloudcroft. Other defoliators had significantoften dramaticeffects in more limited areas. Bark beetle activity continued at relatively high levels in the mixed conifer and spruce-fir types. White pine blister rust, an invasive exotic, was detected at several new locations in New Mexico.