赤松毛虫主要为害赤松、黑松和油松。树木被害后,轻者影响生长,重者造成大片枯死,是我省林业生产的大敌。形态和生活习性成虫体长25～35毫米,翅展50～65毫米。雌蛾体型肥大,雄蛾较瘦小。体色多变,有灰色、赭色、栗棕 Red caterpillar damage mainly pine, black pine and pine. Trees were killed, the light affect the growth, severe cases caused by large dead, is the enemy of our province’s forestry production. Morphology and habits Adults body length 25 ~ 35 mm, wingspan 50 ~ 65 mm. Female moths are hypertrophy, male moths are thinner. Color changeable, gray, ocher, chestnut brown