What's eating my bosnian pine?

Bosnian Pine is one of the toughest pines in cultivation and largely pest-resistant, but it still faces pine aphids, pine needle scale, and pine adelgids. In garden settings rabbits and deer may browse young specimens. Dothistroma needle blight can mimic pest damage. Vigilance in the first few years is most important.

Sticky honeydew dripping onto lower foliage; sooty mould; mild needle yellowing; ant activity on branches Insecticidal soap or neem oil spray; encourage ladybirds and hoverflies; strong water blast breaks up colonies

White waxy scale coverings on needles; needles yellow then drop; heavy infestations weaken the tree Horticultural oil spray at crawler emergence (late spring); repeat after 2–3 weeks if needed

Woolly white masses at needle bases; distorted new growth; needles may drop early Imidacloprid soil drench or bark spray in early spring; remove heavily infested shoots

Bark stripped at base; leading shoot browsed off young trees, causing multi-stemmed growth Tree guards or wire mesh cylinders; deer repellent sprays on young foliage in autumn and winter