ForWarn has detected a disturbance in Southeast Louisiana. May, 2016, defoliation was identified by an unknown insect in the previous spring.
ForWarn indicated a disturbance in Plymouth, Barnstable, and Dukes Counties of Massachusetts. May through June 2016, an insect infestation of gall wasps and gypsy moths caused defoliation in the Eastern Massachusetts area.
The Forest Tent Caterpillar (Malacosoma disstria) is a widespread native defoliator of deciduous forests in the Eastern US. While host trees differ regionally, the insect prefers sweet gum (Liquidambar styraciflua), tupelo gum, black gum (Nyssa spp.) and species of oak (Quercus spp.) in the bottomland forests of North Carolina's Coastal Plain.
The larvae hatch in early spring as the tree buds swell, then larvae defoliate emerging and growing leaves in April and early May. After a few weeks, caterpillars form pupae, then adults emerge in late May.
ForWarn has detected an anomaly in the bottomlands of Roanoke River, North Carolina. Detected in May 2016, tent caterpillars seem to be defoliating the hardwoods in the forest as well as potential flood damage to the swamps.
ForWarn has detected apparent decline in vegetation greenness in August 2015. The data shows characteristics of western spruce budworm population outbreak, which lasts about 10-15 years. The species is known to be a defoliator of coniferous forests and is affecting the amount of foliage in Targhee and Caribou National Forest, Idaho.
ForWarn identified potential disturbances in the Flathead and Lolo National Forests as well as some in the Lewis and Clark National Forest of Montana. Detection in August 2015 observed intensification of potential western spruce budworm damage causing departure of vegetation greenness.
ForWarn found a decline in greenness in the George Washington National Forest of Virginia and Monongahela National Forest of West Virginia in August 2015. Gypsy moth is a historical defoliator of these areas, their damage covering one million acres in 2015. The large decline by the gypsy moth may indicate the start of a population outbreak for the species.
ForWarn found a decline in greenness in the Monongahela National Forest of West Virginia in August, 2015. Gypsy moth is a historical defoliator of these areas, their damage covering one million acres in 2015. The large decline in vegetation by the gypsy moth may indicate the start of a population outbreak for the species.
ForWarn potentially identified a possible insect outbreak in Rio Grande National Forest, Colorado in August 2015. The unknown insect species has caused a decline in vegetation greenness in the area.
ForWarn recognized a decline in vegetation greenness east of Pikes Peak and west of Colorado Springs, Colorado on July 31, 2015. The mixed conifer forest of this area is showing only a portion of the canopy species being affected, most substantially the Douglas fir. The Douglas-fir tussock moth is a likely candidate for the defoliation of firs in the area. At higher elevations, western spruce budworm affecting lodgepole pine, ponderosa pine, and mixed conifers at 9000 ft.