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Round-leaved Mallow (Malva pusilla) Interference in Spring Wheat (Triticum aestivum) and Lentil (Lens culinaris) in Saskatchewan

Published online by Cambridge University Press:  12 June 2017

Roberte M. D. Makowski
Roberte M. D. Makowski*
Affiliation:
Agric. and Agri-Food Canada, Res. Stn., P.O. Box 440, Regina, Saskatchewan, Canada, S4P 3A2
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Abstract

The competitive ability of annual round-leaved mallow was determined in spring wheat and lentil at Indian Head and Regina, Saskatchewan, in 1985 and 1986 using paired quadrats. Significant biomass and seed yield loss occurred in three of four tests in lentil and two of three tests in spring wheat. Differences in numbers of wheat tillers produced between weedy and weed-free plots were found in three of four tests. A two-variable model comprised of early season crop density loss and round-leaved mallow biomass best accounted for the majority of variation in crop yield loss for both lentil and wheat, and tiller density loss in wheat. In 1985 at Indian Head, where no yield loss occurred for either wheat or lentil, round-leaved mallow had been seeded immediately before the crop. Greater yield losses occurred at Regina, in the presence of an older, well-established infestation. In the years and locations with the greatest crop yield losses, round-leaved mallow emerged before the crop causing poor crop emergence. At Regina in 1986, crop yield losses were more than 60% in wheat and 90 to 100% in lentil because of large differences in crop density between weed-free and weedy subplots. Round-leaved mallow exhibited great variability in growth, producing more biomass per plant, more capsules per plant, and more capsules per gram of biomass in the less competitive crop, lentil, than in wheat. Density and biomass of round-leaved mallow were not correlated; with a density of 200 plants m−2, round-leaved mallow biomass in wheat ranged from 100 to 500 g m−2; while in lentil, from 200 to as high as 1000 g m−2, approximately double the range found in wheat. The type of round-leaved mallow infestation (newly seeded or well-established) and environmental conditions (mainly early season precipitation) account for differences between sites and between years.

Keywords

Round-leaved mallow, Malva pusilla Sm. #3 MALPUhard red spring wheat, Triticum aestivum L. ‘Katepwa’lentil, Lens culinaris Medic. ‘Laird.’Multiple regressionpaired quadratsMALPU
Type
Weed biology and Ecology
Information
Weed Science , Volume 43 , Issue 3 , September 1995 , pp. 381 - 388
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

LITERATURE CITED

1. Blackshaw, R. E. 1990. Influence of soil temperature, soil moisture, and seed burial depth on the emergence of round-leaved mallow (Malva pusilla). Weed Sci. 38:518–521.Google Scholar
2. Cousens, R. 1985. A simple model relating yield loss to weed density. Ann. Appl. Biol. 107:239–252.CrossRefGoogle Scholar
3. Douglas, D. W. and Thomas, A. G. 1986. Weed survey of Saskatchewan mustard, lentil, and dry pea crops 1985. Page 20–27 in Weed Survey Series. Publ. 86–2. Agriculture Canada, Regina, SK.Google Scholar
4. Frankton, C. and Mulligan, G. A. 1987. Weeds of Canada. Page 120–121 in Agriculture Canada, Publ. 948, NC Press, Toronto.Google Scholar
5. Friesen, L. F., Nickel, K. P., and Morrison, I. N. 1992. Round-leaved mallow (Malva pusilla) growth and interference in spring wheat (Triticum aestivum) and flax (Linum usitatissimum). Weed Sci. 40:448–454.Google Scholar
6. Gillespie, G. R. and Miller, S. D. 1984. Sunflower competition in wheat. Can. J. Plant Sci. 64:105–111.Google Scholar
7. Hume, L. 1985. Crop losses in wheat (Triticum aestivum) as determined using weeded and nonweeded quadrats. Weed Sci. 33:734–740.Google Scholar
8. Lafond, G. P. 1994. Effects of row spacing, seeding rate, and nitrogen on yield of barley and wheat under zero-till management. Can. J. Plant Sci. 74:703–711.Google Scholar
9. Makowski, R.M.D. 1987. The evaluation of Malva pusilla Sm. as a weed and its pathogen Colletotrichum gloeosporioides (Penz.) Sacc. f. sp. malvae as a bioherbicide. Page 3–72 in Ph.D. Dissertation, University of Saskatchewan, Saskatoon, SK.Google Scholar
10. Makowski, R.M.D. and Morrison, I. N. 1989. Biology of Canadian Weeds. 91. Malva pusilla Sm. (= M. rotundifolia L.). Can. J. Plant Sci. 69:861–879.CrossRefGoogle Scholar
11. Makowski, R.M.D. and Mortensen, K. 1992. The first mycoherbicide in Canada: Colletotrichum gloeosporioides f. sp. malvae for round-leaved mallow control. Proc. of the First Int. Weed Cont. Congress, 17–21 February 1992, Monash University, Melbourne, Australia 2:298–300.Google Scholar
12. O'Sullivan, P. A., Kossatz, G. M., Weiss, G. M., and Dew, D. A. 1982. An approach to estimating yield loss of barley due to Canada thistle. Can. J. Plant Sci. 62:725–731.Google Scholar
13. Radosevich, S. R. and Roush, M. L. 1990. The role of competition in agriculture. Pages 341–363 in Grace, J. B. and Tilman, D., eds. Perspectives on plant competition. Academic Press, Inc., San Diego, California.Google Scholar
14. SAS Institute Inc. 1985. Pages 762–774 in SAS® User's Guide: Statistics, Version 5 Edition. SAS Inst. Inc., Cary, NC.Google Scholar
15. Thomas, A. G. 1978. The 1978 weed survey of cultivated land in Saskatchewan. Page 14–39 in Weed Survey Ser. Publ. 78–2. Agric. Can., Regina, SK.Google Scholar
16. Thomas, A. G. 1978. The 1978 weed survey of cultivated land in Manitoba. Page 15–37 in Weed Survey Ser. Publ. 78–3. Agric. Can., Regina, SK.Google Scholar
17. Thomas, A. G. and Wise, R. F. 1985. Dew's Alberta Weed Survey 1973–1977. Page 25 in Weed Survey Ser. Publ. 85–3. Agric. Can., Regina, SK.Google Scholar
18. Thomas, A. G. and Wise, R. F. 1987. Weed survey of Saskatchewan cereal and oilseed crops 1986. Page 38–126 in Weed Survey Ser. Publ. 87–1. Agric. Can., Regina, SK.Google Scholar
19. Thomas, A. G. and Wise, R. F. 1988. Weed survey of Manitoba cereal and oilseed crops 1986. Page 39–95 in Weed Survey Ser. Publ. 88–1. Agric. Can., Regina, SK.Google Scholar
20. Weaver, S. E., Smits, N., and Tan, C. S. 1987. Estimating yield losses of tomatoes (Lycopersicon esculentum) caused by nightshade (Solanum spp.) interference. Weed Sci. 35:163–168.CrossRefGoogle Scholar