К изучению ивовой горностаевой моли (Hyponomeuta rorella Нb.)

Abstract

Hyponomeuta rorella H b. lays eggs in the thin branches. Egg. laying represents 30—140 flat yellowish eggs packed like tile which are covered with grey semi-transparent shield, the redish, later on darkening spots are visible through it. Taking account of Hyponomeuta rorella H b. number it is possible to count up the average amount of egg layings in 10 branches. With the presence of 10 egg layings in 10 m branches the pest threatens the plantations. Under the conditions of the South of the Ukraine the willow moth pupates without individual cocoons in common nests where a great number of the tree individuals gather that would be used for this species control.