Planta Daninha (2014) 32, 275-282

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I.M. Calha, E. Sousa and J.L. González-Andújar (2014)
Infestation maps and spatial stability of main weed species in maize culture
Planta Daninha 32 (2), 275-282
Abstract: A study on the spatial distribution of the major weeds in maize was carried out in 2007 and 2008 in a field located in Golegã (Ribatejo region, Portugal). The geo-referenced sampling focused on 150 points of a 10 x 10 m mesh covering an area of 1.5 ha, before herbicide application and before harvest. In the first year, 40 species (21 botanical families) were identified at seedling stage and only 22 during the last observation. The difference in species richness can be attributed to maize monoculture favouring reduction in species number. Three of the most representative species were selected for the spatial distribution analysis: Solanum nigrum, Chenopodium album and Echinochloa crus-galli. The three species showed an aggregated spatial pattern and spatial stability over both years, although the herbicide effect is evident in the distribution of some of them in the space. These results could be taken into account when planning site-specific treatments in maize.
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Database assignments for author(s): Isabel M. Calha, Jose L. Gonzalez-Andujar

Research topic(s) for pests/diseases/weeds:

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Digitaria sanguinalis (weed) Maize/corn (Zea mays) Portugal (continental)
Echinochloa crus-galli (weed) Maize/corn (Zea mays) Portugal (continental)
Veronica persica (weed) Maize/corn (Zea mays) Portugal (continental)
Chenopodium album (weed) Maize/corn (Zea mays) Portugal (continental)
Solanum nigrum (weed) Maize/corn (Zea mays) Portugal (continental)
Poa annua (weed) Maize/corn (Zea mays) Portugal (continental)
Datura stramonium (weed) Maize/corn (Zea mays) Portugal (continental)
Abutilon theophrasti (weed) Maize/corn (Zea mays) Portugal (continental)
Sonchus oleraceus (weed) Maize/corn (Zea mays) Portugal (continental)
Sonchus asper (weed) Maize/corn (Zea mays) Portugal (continental)
Oxalis corniculata (weed) Maize/corn (Zea mays) Portugal (continental)
Amaranthus deflexus (weed) Maize/corn (Zea mays) Portugal (continental)