Poison Ivy: A Toronto Master Gardeners Guide

Description Poison ivy (Toxicodendron radicans, previously Rhus radicans) is a woody perennial that grows as a bushy, erect or trailing shrub or as a woody climbing vine, ranging from 60 cm to 2 m (2 to 7 ft) tall. It…

Emerald Ash Borer (EAB): A Toronto Master Gardeners Guide

The Emerald Ash Borer (Agrilus planipennis) is a wood-boring beetle native to Asia that feeds and kills Ash trees (Fraxinus genus). The beetle’s larva bores through the bark into the cambium creating serpentine galleries where it feeds on the phloem,…

Bronze Birch Borer: A Toronto Master Gardeners Guide

The bronze birch borer (Agrilus anxius) is a beetle native to North America. The borers’ larval feeding tunnels under the bark girdle the trunk or branch of the tree and interrupt the flow of nutrients and sap which eventually leads…

Birch Leafminer: A Toronto Master Gardeners Guide

Birch leafminer (Fenusa pusilla) is the most common of several larval insects that mine birch leaves. This small sawfly is native to Europe but has become a major pest of birches in North America. The adult sawfly is a small,…