 They generally feed on the cones of their host plant, but are occasionally also found on shoots and needles.Larvae of the spruce budworm sometimes cause superficial damage on cones, but their effect on the seed crop is minimal (Ives and Wong 1988), at least in central Canada.Capable of causing less than 10% of a seed crop, the larvae of the cone cochylid ("Henricus fuscodorsana" Kearfott) feed in the cones, damaging scales and seed (Hedlin et al.