Agricultural residues are efficient abrasive tools for weed control

  • Manuel Perez-Ruiz
  • Rocío Brenes
  • Jose M. Urbano
  • David C. Slaughter
  • Frank Forcella
  • Antonio Rodríguez-Lizana
Research Article

Abstract

Non-chemical control of weeds is essential for organic farming and is a potential solution to address herbicide-resistant weeds, but too few non-chemical control methods exist. Consumers, farmers, and regulators want organic produce, new tools, and fewer xenobiotics. New weed management strategies focused on the integration of different tools, and strategies are needed to minimize dependence on broad-spectrum herbicides. Accordingly, we assessed abrasive grits from eight agricultural sources (almond shell, grape seed, maize cob, olive seed, poultry manure, sand, soybean meal, and walnut shell) as weed-abrading materials when delivered at high air pressures. Grit efficacies were determined in laboratory trials on weeds common to tomato, sugar beet, and olive: Amaranthus retroflexus L., Chenopodium murale L., and Centaurea cyanus L., respectively. Additionally, application rates and costs of residues were estimated. Control of two- to three-leaf stage weed seedlings ranged from 30 to 100%. In 88% of the trials, weed control exceeded 80%. Except for sand, the effectiveness of the grits was not species dependent. Significant differences in the mass flow of grits suggested that effective doses may vary up to 100% among grit materials. The residue yield ratio (percent control per gram of grit) varied among residues, ranging from 2.8 to 7.1% g−1. We demonstrate that the best combination of weed control, grit dose, and residue yield ratio was provided by maize cob and olive seed, with control rates of 93 and 90%, respectively. This pioneering study simultaneously assessed residues from both herbaceous and woody crops as well as animal wastes and indicated that a more efficient and effective use of these resources for weed control is feasible.

Keywords

Abrasion Alternative weed control Non-chemical application Organic farming Precision farming 

Notes

Acknowledgements

The research was supported in part by the Spanish Ministry of Economic and Competence (Project: AGL2013-46343-R) and the Regional Government of Andalucía (Project: P12-AGR-1227).

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Copyright information

© INRA and Springer-Verlag France SAS, part of Springer Nature 2018

Authors and Affiliations

  • Manuel Perez-Ruiz
    • 1
  • Rocío Brenes
    • 1
  • Jose M. Urbano
    • 2
  • David C. Slaughter
    • 3
  • Frank Forcella
    • 4
  • Antonio Rodríguez-Lizana
    • 1
  1. 1.Área de Ingeniería Agroforestal. Dpto. de Ingeniería Aeroespacial y Mecánica de FluidosUniversidad de SevillaSevilleSpain
  2. 2.Dpto. de Ciencias AgroforestalesUniversidad de SevillaSevilleSpain
  3. 3.Department of Biological and Agricultural EngineeringUniversity of CaliforniaDavisUSA
  4. 4.North Central Soil Conservation Research LaboratoryUSDA-ARSMorrisUSA

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