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Redroot Pigweed (Amaranthus retroflexus) and Barnyardgrass (Echinochloa crus-galli) Interference in Potatoes (Solanum tuberosum)

Published online by Cambridge University Press:  12 June 2017

Mark J. Vangessel  and
Karen A. Renner
Mark J. Vangessel
Affiliation:
Dep. Crop and Soil Sci., Michigan State Univ., East Lansing, MI 48824
Karen A. Renner
Affiliation:
Dep. Crop and Soil Sci., Michigan State Univ., East Lansing, MI 48824
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Abstract

In greenhouse replacement series experiments, ‘Atlantic’ and ‘Russet Burbank’ potatoes and barnyardgrass were more competitive than redroot pigweed as measured by relative competitive ability. In additive design field studies, four redroot pigweed or barnyardgrass per meter of row did not reduce Atlantic tuber yield when planted between the row following hilling (6 to 7 weeks after planting). However, as few as one barnyardgrass or redroot pigweed per meter of row reduced marketable tuber yield 19 to 33% when seeded in the row at the time of potato planting. Redroot pigweed reduced tuber yield more than barnyardgrass did in 1 yr of research. The correlation coefficients were similar for both weed density and weed biomass regressed on tuber yield. Aboveground potato biomass was not consistent in predicting total tuber yield. Furthermore, variability in aboveground potato biomass was not due to increasing weed weight or density. Neither specific gravity nor tuber quality was altered by the presence of any density of either weed species.

Keywords

Potato, Solanum tuberosum L.redroot pigweed, Amaranthus retroflexus L. # AMAREbarnyardgrass, Echinochloa crus-galli (L.) Beauv. # ECHCGCompetitioninterferencetuber qualitySolanum tuberosumAmaranthus retroflexusEchinochloa crus-galliAMAREECHCG
Type
Weed Biology and Ecology
Information
Weed Science , Volume 38 , Issue 4-5 , September 1990 , pp. 338 - 343
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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