The biology of Canadian weeds. 115. Conyza canadensis
Conyza canadensis (L.) Cronq. (Canada fleabane, horseweed, mare’s-tail) is a winter or summer annual, native to North America, and found in all provinces of Canada except Newfoundland. It is a weed of orchards, vineyards, roadsides, and arable fields where tillage has been reduced or eliminated. Mos...
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crcansciencepubl:10.4141/p00-196 2024-09-30T14:38:53+00:00 The biology of Canadian weeds. 115. Conyza canadensis Weaver, Susan E. 2001 http://dx.doi.org/10.4141/p00-196 http://www.nrcresearchpress.com/doi/pdf/10.4141/P00-196 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Plant Science volume 81, issue 4, page 867-875 ISSN 0008-4220 1918-1833 journal-article 2001 crcansciencepubl https://doi.org/10.4141/p00-196 2024-09-05T04:11:13Z Conyza canadensis (L.) Cronq. (Canada fleabane, horseweed, mare’s-tail) is a winter or summer annual, native to North America, and found in all provinces of Canada except Newfoundland. It is a weed of orchards, vineyards, roadsides, and arable fields where tillage has been reduced or eliminated. Most seedlings emerge from late August through October and form rosettes which overwinter. Large numbers of small, wind-dispersed seeds, ranging to over 200 000 seeds per plant, are produced in late summer. Populations of C. canadensis in more than ten countries have evolved resistance to herbicides such as paraquat, atrazine, chlorsulfuron or glyphosate. Several paraquat resistant populations were found in orchards in Essex Country, Ontario. It serves as a wild host of the tarni shed plant bug, and of aster yellows, a mycoplasma disease transmitted by the aster leaf hopper. Key words: Canada fleabane, ERICA, Conyza canadensis, Erigeron canadensis, horseweed Article in Journal/Newspaper Newfoundland Canadian Science Publishing Canada Canadian Journal of Plant Science 81 4 867 875 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Conyza canadensis (L.) Cronq. (Canada fleabane, horseweed, mare’s-tail) is a winter or summer annual, native to North America, and found in all provinces of Canada except Newfoundland. It is a weed of orchards, vineyards, roadsides, and arable fields where tillage has been reduced or eliminated. Most seedlings emerge from late August through October and form rosettes which overwinter. Large numbers of small, wind-dispersed seeds, ranging to over 200 000 seeds per plant, are produced in late summer. Populations of C. canadensis in more than ten countries have evolved resistance to herbicides such as paraquat, atrazine, chlorsulfuron or glyphosate. Several paraquat resistant populations were found in orchards in Essex Country, Ontario. It serves as a wild host of the tarni shed plant bug, and of aster yellows, a mycoplasma disease transmitted by the aster leaf hopper. Key words: Canada fleabane, ERICA, Conyza canadensis, Erigeron canadensis, horseweed |
format |
Article in Journal/Newspaper |
author |
Weaver, Susan E. |
spellingShingle |
Weaver, Susan E. The biology of Canadian weeds. 115. Conyza canadensis |
author_facet |
Weaver, Susan E. |
author_sort |
Weaver, Susan E. |
title |
The biology of Canadian weeds. 115. Conyza canadensis |
title_short |
The biology of Canadian weeds. 115. Conyza canadensis |
title_full |
The biology of Canadian weeds. 115. Conyza canadensis |
title_fullStr |
The biology of Canadian weeds. 115. Conyza canadensis |
title_full_unstemmed |
The biology of Canadian weeds. 115. Conyza canadensis |
title_sort |
biology of canadian weeds. 115. conyza canadensis |
publisher |
Canadian Science Publishing |
publishDate |
2001 |
url |
http://dx.doi.org/10.4141/p00-196 http://www.nrcresearchpress.com/doi/pdf/10.4141/P00-196 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Plant Science volume 81, issue 4, page 867-875 ISSN 0008-4220 1918-1833 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.4141/p00-196 |
container_title |
Canadian Journal of Plant Science |
container_volume |
81 |
container_issue |
4 |
container_start_page |
867 |
op_container_end_page |
875 |
_version_ |
1811641478053625856 |