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Integration of Cropping Practices and Herbicides Improves Weed Management in Dry Bean (Phaseolus vulgaris)

  • Robert E. Blackshaw (a1), Louis J. Molnar (a1), H.-Henning Muendel (a1), Gilles Saindon (a2) and Xiangju Li (a3)...

Abstract

A field study was conducted to determine the combined effects of row spacing, plant density, and herbicides on weed management and dry bean (Phaseolus vulgaris) yield. In weed-free dry bean, a reduction in row spacing from 69 to 23 cm increased yield by 19% and an increase in density from 20 to 50 plants/m2 increased yield by 17%. In the presence of weeds, narrow rows and high plant densities increased dry bean yield, but without herbicides, yields remained low. However, when combined with herbicides, narrow-row and high-density production practices resulted in better weed control and higher dry bean yield than that attained in a wide-row and low-density production system. Herbicide combinations, often at reduced rates, controlled weeds as well or better than the full rate of any individual herbicide. Ethalfluralin applied preplant incorporated followed by reduced rates of imazethapyr or bentazon postemergence (POST) consistently controlled weeds. Imazamox exhibited the potential to provide a total POST weed control option in dry bean production. Information gained in this study will be used to develop improved weed management programs appropriate for either wide- or narrow-row dry bean production systems.

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Corresponding author

Corresponding author's E-mail: blackshaw@em.agr.ca.

References

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Keywords

Integration of Cropping Practices and Herbicides Improves Weed Management in Dry Bean (Phaseolus vulgaris)

  • Robert E. Blackshaw (a1), Louis J. Molnar (a1), H.-Henning Muendel (a1), Gilles Saindon (a2) and Xiangju Li (a3)...

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