Univoltine
Guides
Zeiraphera canadensis
spruce bud moth
Zeiraphera canadensis, the spruce bud moth, is a small tortricid moth native to North America. The species is univoltine, with eggs laid on white spruce in July that overwinter and hatch the following May. Larvae feed within spruce buds and shoots, causing deformation and growth reduction in host trees. The species is recognized as a significant pest of white spruce plantations, particularly in Canada and the northeastern United States.
Zicrona caerulea
Blue Shieldbug, blue shield bug
Zicrona caerulea is a small predatory shield bug in the family Pentatomidae, subfamily Asopinae. Adults measure 5–8 mm and display a striking uniform metallic blue-green coloration, with immatures showing red abdomens with black markings. This univoltine species is a documented predator of leaf beetles (Altica spp.), beetle larvae, and moth caterpillars, though it has also been observed feeding on plants. It overwinters as an adult and produces new adults from July onwards.