Key to Shelterbelt Insects in the Northern Great Plains

absent Aceria Adults present Agrilus American elm aphid ash borer ATTACK bark beetle blister blue spruce body body segment Body yellowish bore boxelder branches Bur oak chamber cherry common chokecherry Cotton cottonwood damage dark brown defoliators eastern tent caterpillar elytra Entomol Figure flatheaded wood borer Forest Found frass gall mite gallery gray green ash Hackberry hair Head Insect July to September June to August June to July larch Larvae feed Larvae infest Larvae present leaf beetle leaffolding leafminer leafroller leaves legs length Leperisinus less light green lines Malacosoma marked needles North October orange Pachypsylla pale plate plum POINT Ponderosa pine present from July prolegs Pronotum pupate root roundheaded wood borer sawfly scale Siberian elm Siberian peashrub sphinx spines stripe Summer tent caterpillar trees Tunnel twig upper leaf surface webbing White willow wings yellow yellowish green