The distribution of the hemlock woolly adelgid (Hemiptera: Adelgidae) in Canada

The Canadian Entomologist, Journal Year: 2025, Volume and Issue: 157

Published: Jan. 1, 2025

Abstract The hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae), has distinct native and invasive populations in Canada. On the country’s west coast, adelgid is a insect that feeds on western hemlock, Tsuga heterophylla (Rafinesque-Schmaltz) Sargent, mountain mertensiana (Bongard) Carrière (Pinaceae). In eastern Canada, an species attacks kills canadensis (Linnaeus) We obtained all Canadian records of A. institutional public databases, developed updated range maps phenologies for British Columbia dispersal estimates Nova Scotia. Columbia, ’s observed distribution centred around Lower Mainland Vancouver Island but with Interior along Pacific coast have been poorly explored. invaded southern Scotia, portions Niagara region Ontario as far Hamilton, at least one site north shore Lake Ontario. No found New Brunswick, Quebec, or Prince Edward Island, Finally, we estimated rate spread Scotia 12.6 ± 8.2 to 20.5 27.21 km/year.

Language: Английский

Modeling the distribution of hemlock woolly adelgid under several climate change scenarios

Canadian Journal of Forest Research, Journal Year: 2024, Volume and Issue: 54(12), P. 1458 - 1470

Published: Aug. 7, 2024

The hemlock woolly adelgid (HWA), Adelges tsugae Annand, has invaded eastern North America and caused significant mortality to hemlock, Tsuga canadensis (L.) Carrière. In America, HWA’s range is theorized be limited by minimum winter temperatures. As climate change reduces the severity of winter, risk northward expansion HWA increases. This study used maximum entropy species distribution modeling in conjunction with occurrence records future projections model habitat suitability for throughout hemlock. Species models were created present climatic conditions using both historical data emissions scenarios mid- late-century. addition, condition reference western Asia generated comparison current earlier predictions potential America. Under a low scenario, will capable invading almost entire end century. More extreme warming result more rapid northwards shift mid-century. consequences are significant, infestations likely become widespread severe due change.

Language: Английский

The distribution of the hemlock woolly adelgid in Canada.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: July 22, 2024

Abstract The hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae) has distinct native and invasive populations in Canada. On Canada’s west coast the adelgid is a insect feeding on western hemlock, Tsuga heterophylla (Raf.) Sarg. mountain mertensiana (Bong.) Carrière (Pinaceae). In eastern Canada, an species that attacks kills canadensis (L.) We obtained all records of A. institutional public databases develop updated range maps, phenologies dispersal estimates for British Columbia Canada ’s distribution centred around lower mainland Vancouver Island but with interior along Pacific have been poorly explored which could be sources biological control agents to manage east. invaded southern Nova Scotia, portions Niagara region Ontario as far Hamilton, at least one site north shore Lake Ontario. No found New Brunswick, Quebec or Prince Edward Island. Finaly, we estimated rate spread Scotia 12.6 ± 8.2 20.5 27.21 km/year.

Language: Английский