Two-year weed seedling population responses to a post-emergent method of site-specific weed management

Martin M. Williams, Roland Gerhards, David A. Mortensen

Research output: Contribution to journalArticlepeer-review


Field experiments were conducted to determine how a site-specific weed management practice in Zea mays L. influenced the numerical and spatial distribution of a naturally occurring weed infestation in Z. mays and the succeeding Beta vulgaris L. crop. Compared to conventional broadcast herbicide applications, site-specific herbicide applications reduced herbicide load by 11.5 and 98.0% in two separate Z. mays fields. The broad range in outcomes was attributed to the spatial aggregation and density of target weed populations. While herbicide use was successfully reduced at field locations with low weed density, most survivors of multiple control tactics were in locations with the highest initial density. A greater understanding of interactions between weed management and weed density would increase the likelihood that site-specific weed management offers long-term improvements over conventional approaches.

Original languageEnglish (US)
Article number353871
Pages (from-to)247-263
Number of pages17
JournalPrecision Agriculture
Issue number3
StatePublished - Nov 2000
Externally publishedYes


  • Integrated weed management
  • Kolmogorov-Smirnov test
  • Patch spraying
  • Spatiotemporal dynamics
  • Weed mapping

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)


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