ForWarn II

Satellite-Based Change Recognition and Tracking


Gypsy Moth and Southern Pine Beetle Defoliation in Connetquot River State Park Preserve, Long Island, NY

Mon, 07/11/2016 - 10:07 -- wchristie

ForWarn has detected anomalies in the Connetquot River State Park Preserve and the surrounding area in Long Island, NY from June 8 to July 12, 2016. Gypsy Moths and Southern Pine Beetles have historical association with this data and the likely cause of this event.

Drought in Sequoia National Forest, CA

Mon, 06/06/2016 - 08:57 -- wchristie

ForWarn has identified several potential threats to the Sequoia National Forest, California in May, 2016. Potential drought-induced delay in spring greennup created elevation banding within the forest. There is historical decline in vegetation greenness due to the western pine beetle causing tree mortality as well as tree vulnerability to disease during this time of year.

Insect Disturbance in MA

Fri, 06/03/2016 - 13:58 -- wchristie

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.

Defoliation in NC's Roanoke River Bottomland Forests

Thu, 05/19/2016 - 18:19 -- stevenorman
Forest Tent Caterpillar defoliation along Conoho Creek

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.

Western Spruce Budworm Outbreak in Targhee and Caribou National Forests, ID

Mon, 08/24/2015 - 07:03 -- wchristie

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.


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