Unique, first in Russia FIELD mobile guide to the tree pest insects of Northern Eurasia: 92 most prevalent species, each with drawings of imago (both male and female if different), eggs/laying, larva/caterpillar and types of plant damages, as well as text descriptions of their appearance, reproduction cycle, way of life, habitats and feeding plants, economical loss for forest industry. It is easy and fun to identify species using only three simple determination characters (appearance, type of da