Skip to main content Accessibility help
×
Home

Factors affecting germination of horseweed (Conyza canadensis)

  • Vijay K. Nandula, Thomas W. Eubank (a1), Daniel H. Poston (a1), Clifford H. Koger (a2) and Krishna N. Reddy (a3)...

Abstract

The influence of environmental factors on germination and emergence of horseweed was examined in growth chamber experiments. Germination was highest (61%) under 24/20 C day/night temperature under light. Horseweed seed germination was observed under both light (13 h photoperiod) and complete darkness (24 h), but germination under continuous darkness was only 0 to 15% compared with 0 to 61% under light. All other experiments were conducted under 24/20 C and 13-h light conditions. Germination was 19 to 36% over a pH range from 4 to 10, with a trend toward higher germination under neutral-to-alkaline conditions. Horseweed germination was > 20% at < 40 mM NaCl concentration and lowest (4%) at 160 mM NaCl. These data suggest that even at high soil salinity conditions, horseweed can germinate. Germination of horseweed decreased from 25% to 2% as osmotic potential increased from 0 (distilled water) to −0.8 MPa, indicating that germination can still occur under moderate water stress conditions. Horseweed seedling emergence was at its maximum on the soil surface, and no seedlings emerged from seeds placed at a depth of 0.5 cm or higher.

Copyright

Corresponding author

Corresponding author. Delta Research and Extension Center, Mississippi State University, P.O. Box 197, Stoneville, MS 38776; vknandula@yahoo.com

References

Hide All
Anonymous. 2003. Phosphorus in Mississippi soils. Stoneville, MS: Mississippi State University Extension Service Information Sheet 871.
Balyan, R. S. and Bhan, V. M. 1986. Germination of horse purslane (Trianthema portulacastrum) in relation to temperature, storage conditions, and seedling depths. Weed Sci. 34:513515.
Benech Arnold, R. L., Ghersa, C. M., Sanchez, R. A., and Insausti, P. 1990. Temperature effects on dormancy release and germination rate in Sorghum halepense (L.) Pers. seeds: a quantitative analysis. Weed Res. 30:8189.
Bhowmik, P. C. and Bekech, M. M. 1993. Horseweed (Conyza canadensis) seed production, emergence, and distribution in no-tillage and conventional-tillage corn (Zea mays). Agron. Trends Agric. Sci. 1:6771.
Boykin, D. L., Carle, R. R., Ranney, C. D., and Shanklin, R. 1995. Weather Data Summary for 1964–1993 for Stoneville, MS. Mississippi State, MS: Mississippi State University, Mississippi Agricultural and Forestry Experimental Station Technical Bulletin 201. 49 p.
Bradshaw, L. D., Padgette, S. R., Kimball, S. L., and Wells, B. H. 1997. Perspectives on glyphosate resistance. Weed Technol. 11:189198.
Brown, S. M. and Whitwell, T. 1988. Influence of tillage on horseweed (Conyza canadensis). Weed Technol. 2:269270.
Buhler, D. D. 1992. Population dynamics and control of annual weeds in corn (Zea mays) as influenced by tillage systems. Weed Sci. 40:241248.
Buhler, D. D. and Owen, M. D. K. 1997. Emergence and survival of horseweed (Conyza canadensis). Weed Sci. 45:98101.
Chachalis, D. and Reddy, K. N. 2000. Factors affecting Campsis radicans seed germination and seedling emergence. Weed Sci. 48:212216.
Evetts, L. L. and Burnside, O. C. 1972. Germination and seedling development of common milkweed and other species. Weed Sci. 20:371378.
Holm, L. J., Doll, E., Holm, P. J., and Herberger, J. 1997. World Weeds, Natural Histories and Distribution. New York: J Wiley. Pp. 226235.
Jain, R. and Singh, M. 1989. Factors affecting goatweed (Scoparia dulcis) seed germination. Weed Sci. 37:766770.
Koger, C. H., Poston, D. H., Hayes, R. M., and Montgomery, R. F. 2004a. Glyphosate-resistant horseweed (Conyza canadensis) in Mississippi. Weed Technol. 18:820825.
Koger, C. H., Poston, D. H., and Eubank, T. W. 2005. Factors affecting germination of horseweed (Conyza canadensis). Proc. South. Weed Sci. Soc. 58:218.
Koger, C. H., Reddy, K. N., and Poston, D. H. 2004b. Factors affecting seed germination, seedling emergence, and survival of texasweed (Caperonia palustris). Weed Sci. 52:989995.
Lehoczki, E., Laskay, G., Polos, E., and Mikulas, J. 1984. Resistance to triazine herbicides in horseweed (Conyza canadensis). Weed Sci. 32:669674.
Lehoczki, E., Laskay, G., Gaal, I., and Szigeti, Z. 1992. Mode of action of paraquat in leaves of paraquat-resistant Conyza canadensis . Plant Cell Environ. 15:531539.
Miles, J. E., Nishimoto, R. K., and Kawabata, O. 1996. Diurnally alternating temperatures stimulate sprouting of purple nutsedge (Cyperus rotundus) tubers. Weed Sci. 44:122125.
Nishimoto, R. K. and McCarty, L. B. 1997. Fluctuating temperatures and light influence seed germination of goosegrass (Eleusine indica). Weed Sci. 45:426429.
Reddy, K. N. and Singh, M. 1992. Germination and emergence of hairy beggarticks (Bidens pilosa). Weed Sci. 40:195199.
Regehr, D. and Bazzaz, F. 1979. The population dynamics of Erigeron canadensis, a successional winter annual. J. Ecol. 67:923934.
Shaw, D. R., Mack, R. E., and Smith, C. A. 1991. Redvine (Brunnichia ovata) germination and emergence. Weed Sci. 39:3336.
Singh, M. and Achhireddy, N. R. 1984. Germination and ecology of milkweedvine (Morrenia odorata). Weed Sci. 32:781785.
Smisek, A., Doucet, C., Jones, M., and Weaver, S. 1998. Paraquat resistance in horseweed (Conyza canadensis) and Virginia pepperweed (Lepidium virginicum) from Essex County, Ontario. Weed Sci. 46:200204.
Steuter, A. A., Mozafar, A., and Goodin, J. R. 1981. Water potential of aqueous polyethylene glycol. Plant. Physiol. 67:6467.
Taylorson, R. B. 1987. Environmental and chemical manipulation of weed seed dormancy. Rev. Weed Sci. 3:135154.
Van Gessel, M. J. 2001. Glyphosate-resistant horseweed from Delaware. Weed Sci. 49:703705.
Vencill, W. K. and Banks, P. A. 1994. Effects of tillage systems and weed management on weed populations in grain sorghum (Sorghum bicolor). Weed Sci. 42:541547.
Weaver, S. E. 2001. The biology of Canadian weeds. 115. Conyza canadensis . Can. J. Plant Sci. 81:867875.
Wilson, R. G. Jr. 1979. Germination and seedling development of Canada thistle (Cirsium arvense). Weed Sci. 27:146151.

Keywords

Factors affecting germination of horseweed (Conyza canadensis)

  • Vijay K. Nandula, Thomas W. Eubank (a1), Daniel H. Poston (a1), Clifford H. Koger (a2) and Krishna N. Reddy (a3)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed