.."Damn cabbage, along with species such as black thorn and witch grass, is considered to be a manifestation of alien flora in our world. However, in reality, this is nothing more than a consequence of mutagenic changes to which samples of local vegetation have been subjected.
In order to identify the pathogen, extensive air and soil studies were conducted in quarantine zones. As a result of which, although some features in their composition were identified, no mutagenic factors could be detected."
