Résumés
Abstract
Stork’s bill was observed for the first time in 2009, and again in 2010, in a 22-yr-old conservation tillage study at La Pocatière, Québec. Within a year, the species had spread from two to ten plots, with densities ranging between 100 and 232 plants m-2 in 2010 compared with ≤ 12 plants m-2 in 2009. Currently, stork’s bill is not a major agricultural weed in eastern Canada; it should therefore be monitored closely and acted upon rapidly to prevent its establishment and spread. The relatively high hemp-nettle density in no-till compared with tilled treatments in 2009 was attributed to a cultivation operation conducted exceptionally in no-till treatments, confirming the responsiveness of the species to tillage.
Keywords:
- conservation tillage,
- Erodium cicutarium,
- Galeopsis tetrahit,
- hemp-nettle,
- no-till,
- redstem filaree,
- stork’s bill,
- weed seedbank
Résumé
L’érodium cicutaire a été observée pour la première fois en 2009, puis à nouveau en 2010, dans une étude sur la conservation des sols en place depuis 22 ans, à La Pocatière, Québec. En un an, l’espèce s’est répandue de deux à dix parcelles et la densité est passée de ≤ 12 plants m-2 en 2009 à 100-232 plants m-2 en 2010. L’érodium cicutaire, n’étant pas une mauvaise herbe d’importance agricole dans l’est canadien, devra être surveillée étroitement de façon à pouvoir intervenir rapidement et prévenir son expansion. La densité relativement élevée d’ortie royale dans le semis direct comparativement aux parcelles avec travail du sol en 2009 a été attribuée à une opération exceptionnelle de sarclage mécanique dans le semis direct, ce qui confirme la sensibilité de l’espèce au travail du sol.
Mots clés:
- banque de graines de mauvaises herbes,
- érodium cicutaire,
- Erodium cicutarium,
- Galeopsis tetrahit,
- ortie royale,
- pratiques de conservation des sols,
- semis direct
Parties annexes
References
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10.7202/706058ar