Resumo

CERAZO, María Beatriz  e  CONTICELLO, Luisa. Weed's communities in vegetable crops in Neuquen Province, (Argentina). Bol. Soc. Argent. Bot. [online]. 2008, vol.43, n.1-2, pp.121-135. ISSN 1851-2372.

Most vegetable crops are very sensitive to the weed competition, which affects the yields and quality and sometimes the total lost of the crop. The objective of this study was to evaluate the floristic composition of the weed communities and to analyse its sintaxonomy, because both are effective parameters for measuring the state of the crop. The vegetation was sampled following the Braun-Blanquet methodology on farms in six localities in the province. We determined eight associations from this information: six are included in the class Stellarietea mediae (Br. Bl. 1931) Tx., Prsg. et Lohm, 1950 and the other two in Artemisietea vulgaris Lohm, Prsg and Tüxen 1950. The deficient state of the crop resulted from the development of perennial and difficult to control weeds, most of them included in the class Artemisietea vulgaris. Eighty nine species were tacked stock for the autumn -winter and spring - summer periods. There was a clear predominance of Dicotyledonous ( 79 %) over Monocotyledonous and a predominance of annual weeds (66%) over perennial weeds.

Palavras-chave : Weeds; Syntaxonomy; Vegetables; Neuquén.

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