The preparation Viriin-NSh is a biological preparation containing polyhedra of the nuclear polyhedrosis virus of the non-sterile silkworm. The titer of the preparation is 1 x 10^9 polyhedra per 1 ml. The preparation is produced by the company DCLP "Kharkivlisozahist" in Ukraine. The sphere of application of this product includes coniferous and deciduous forests. This biological agent is used for plant protection against pests, ensuring environmentally safe treatment.