Insect herbivore damages on white spruce growing in plantations and naturally regenerated under-canopy forest stands

This data was prepared to compare insect damage on white spruce (Picea
glauca (Moench) Voss, Pinaceae) growing in plantations with naturally
regenerated trees under mature forest canopies in the boreal forest
(Québec, Canada). We selected ten sites in the naturally regenerated
forest and small, multispecies plantations and sampled ten young trees
(per site) in late summer 2020 and again in early and late summer 2021. We
recorded overall rates of damage for galls, damage by spruce budworm
(Choristoneura fumiferana (Clemens, 1865)), spruce bud midge, spruce
budmoth, spruce gall midge, cooley adelgid, defoliation from sawflies and
other caterpillars.