Viral-disease
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Erannis vancouverensis
Vancouver Looper
Erannis vancouverensis is a geometrid moth occurring from northern British Columbia to central California. Larvae feed on young leaves of deciduous trees. Adults emerge during late autumn, with females being wingless. The species occasionally reaches infestation levels and is subject to natural population control through virus disease and tachinid fly parasitism.
Tetropium parvulum
Northern Spruce Borer
Tetropium parvulum, the northern spruce borer, is a small cerambycid beetle specialized on spruce hosts. It was elevated from synonymy with T. cinnamopterum based on distinct morphological differences in larvae and adults, and exhibits strict host specificity to Picea compared to the conifer generalist T. cinnamopterum. The species has a one-year life cycle and is an economically important borer of white and Engelmann spruce logs in western Canada.
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