Distribution maps of plants in the German Democratic Republic. 8th Series. Segetal plants of segetal sites.
Distribution maps with notes are given of the relative frequencies and population trends of 36 segetal weed species of arable crops in the German Democratic Republic surveyed in 1950-80. Galinsoga parviflora, Solanum nigrum, Echinochloa crus-galli, Avena fatua, Galium aparine, Chenopodium album, Tripleurospermum inodorum and Apera spica-venti are among the species that continue to pose a serious threat.