With the aim of finding secondary hosts of Pemphigus populi Courch., P. lich- tensteini Tullgr and P. vesicarius and thus determining taxonomic differentiation of these Pemphigus from P. fuscicornis Koch., a common circle ...

In the forest zone of the Crimean Peninsula representatives of the new for science species Deroceras ramosum sp. n. were found. This species differs from the described earlier species of the genus Deroceras in peculiarities ...