Expansion and harmful effects of Galium aparine L., on winter rape in the loess soil of Czeslawice
1996
Kapeluszny, J. (Akademia Rolnicza, Lublin (Poland). Katedra Ogolnej Uprawy Roli i Roslin)
The investigations proved that Galium aparine L. was the expansive species on loess soil in Czeslawice. Mean number of its plants in winter rape crop exceeded 10 plants per square m in 1993-95, while previously this occurred very rarely. The yield of winter rape seeds was reduced by - 30% when the number of Galium aparine plants reached 8-11 per square m compared to fields with no Galium aparine. The loss of yield varied significantly from year to year. For example 0.68 t/ha in 1993, while 1.15 t/ha in 1994
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