Larch-pest
Guides
Adelges laricis
Larch Woolly Aphid
Adelges laricis is a holocyclic adelgid with a complex life cycle involving two host genera: Picea (spruce) as primary host where galls form, and Larix (larch) as secondary host. The species exhibits extensive morphological polymorphism across five generations (Fundatrix, Migrans alata, Hiemosistens, Sexupara, Sexualis). First-instar nymphs are the only mobile stage; subsequent instars remain sessile with stylets permanently inserted. The species is a significant forest pest causing reduced tree vigor, needle damage, and mortality under chronic infestation.
Lasiomma
Lasiomma is a genus of flies in the family Anthomyiidae, established by Stein in 1916. Several species are known to be significant pests of cones and seeds of European larch (Larix decidua), causing damage in the natural range of this tree in the French Alps and Italian Piedmont. The genus has been recorded from multiple European countries including France, Denmark, Norway, and Sweden.