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Adventive weed flora in vineyards of Bosnia and Herzegovina.


By floristic and phytocoenological research of weed flora in vineyards of Bosnia and Herzegovina 14 adventive species were determined: Amaranthus albus L., Amaranthus retroflexus L., Ambrosia artemisiifolia L., Asclepias syriaca L., Avena barbata Pott. ex Link., Bidens bipinnata L., Conyza canadensis (L.) Cronq., Erigeron annuus (L.) Pers., Foeniculum vulgare Mill., Galinsoga parviflora Cav., Oxalis stricta L., Portulaca oleracea L., Sorghum halepense (L.) Pers., and Xanthium italicum Moretti. Most of them (8 species or 57.14%) have North American origin. The most important species from this origin in vineyard weed flora of Bosnia and Herzegovina are: Amaranthus retroflexus L. and Ambrosia aretemisiifolia L. The following species also had a higher frequency: Conyza canadensis (L.) Cronq., Erigeron annuus (L.) Pers. and Xanthium italicum Moretti. In the structure of adventive floristic elements, plants of Mediterranean origin were presented by 4 species or 28.57%. Sorghum halepense (L.) Pers. and Portulaca oleracea L. were characterized by higher frequency in weed flora. However, Foeniculum vulgare Mill. Mediterranean spice species had been determined as a weed. Out of 2 species of South American origin, Galinsoga parviflora Cav. had high frequency in weed flora in vineyards of Bosnia and Herzegovina.