Optimization of spatial structure of gypsy moth, Lymantriadispar L. (Lepidoptera: Lymantriidae) and angoumois grain moth, Sitotroga cerealella Oliv. (Lepidoptera:Gelechiidae) cultures - Ja. A. Bachinskaja; A. Z. Zlotin; Ju. Markina (The Kharkov Entomological Society gazette)