Über einige Lärchenschädlinge und ihre Parasiten in Japan, Europa und Kanada.

Abstract

The above paper deals with four pests of larch and their parasites in Europe, Japan, and Canada: Pristiphora erichsonii Hartig, Pachynematus itoi Okutani, Diprion nipponicus Rohwer, and Lymantria dispar Linnaeus. The life history and distribution of the two Nematine species Pristiphora erichsonii and Pachynematus itoi in Europe and in Japan are more intimately dealt with.