Long‐term stability of distribution of <i>Alopecurus myosuroides</i> Huds. within cereal fields

Wilson, B. J.; Brain, P.

doi:10.1111/j.1365-3180.1991.tb01776.x

Cited by 106 publications

(89 citation statements)

References 7 publications

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“…remained similar over 10 years; the distribution was more stable in fields which were always sown with cereals· compared with fields in which grass and cereals were rotated. Wilson and Brain (1991) suggests that the reason for this stability is that the majority of seeds of blackgrass are shed close to the parent plant before harvest. Gerhards et al (1997) characterised the spatial stability of common sunflower, velvetleaf, green and yellow foxtail and hemp dogbane in eastern Nebraska.…”

Section: Spatial Heterogeneity Of Weedsmentioning

confidence: 99%

“…For example, Wilson and Brain (1991) found that the distribution of patches of blackgrass (Alopecurus myosuroides Huds.) remained similar over 10 years; the distribution was more stable in fields which were always sown with cereals· compared with fields in which grass and cereals were rotated.…”

Section: Spatial Heterogeneity Of Weedsmentioning

confidence: 99%

“…Various studies indicate that the spatial distribution of weeds in fields is often relatively stable, even though the absolute density of weeds may fluctuate (Wilson and Brain, 1991;Johnson et al, 1995;Cardina et al, 1996). For example, Wilson and Brain (1991) found that the distribution of patches of blackgrass (Alopecurus myosuroides Huds.)…”

Section: Spatial Heterogeneity Of Weedsmentioning

confidence: 99%

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Extent and Implications of Weed Spatial Variability in Arable Crop Fields

Garibay¹,

Richner²,

Stamp³

et al. 2001

Plant Production Science

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: The integration of technologies and principles to assess, manage, and evaluate spatial and temporal variability has enabled the site-specific application of variable rates of agrochemicals. It is referred to as precision management. This article concerns with the potential of precision management for weed control. Weeds are heterogeneously distributed and show different levels of spatial aggregation. A better understanding of weed patchiness is necessary for precision weed management. Studies reviewed in this article showed that significant reduction in the amount of herbicide can be achieved when the spatial variability of weeds is taken into account. It is often difficult, however, to obtain information on the spatial distribution of weeds with accuracy because it depends on monitoring techniques, scales of observation, and statistical methods applied. We conclude that the precision application of herbicides is one approach to managing weeds and it will be possible to achieve a drastic reduction in herbicide applications by using a combination of several different types of weed control strategies. Not only farmers with large fields but also those with small fields should have better access to information on spatial variability to make decisions for weed control.

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Section: Spatial Heterogeneity Of Weedsmentioning

confidence: 99%

Section: Spatial Heterogeneity Of Weedsmentioning

confidence: 99%

Section: Spatial Heterogeneity Of Weedsmentioning

confidence: 99%

See 1 more Smart Citation

Extent and Implications of Weed Spatial Variability in Arable Crop Fields

Garibay¹,

Richner²,

Stamp³

et al. 2001

Plant Production Science

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“…However, research has shown that weed aggregation exists (Marshall, 1988;Wilson and Brain, 1991;Thornton et al, 1990;Wiles et al, 1992;Cardina et al, 1995;Mortensen et al, 1993) and that if herbicides were applied in a spatially varying manner based on weed density, a reduction in herbicide usage would occur Johnson et al, 1995). Thus, sitespecific weed management and integrated weed management [based on the principles of integrated pest management (IPM)] have been proposed as practices which use knowledge of weed variability to achieve economic and environmental goals (Lindquist et al, 1998).…”

mentioning

confidence: 99%

Machine-Vision Weed Density Estimation for Real-Time, Outdoor Lighting Conditions

Steward

Tian

1999

Transactions of the ASAE

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“…Weed patches are considerable stable if they are consistent with location and density over time (Wilson and Brain, 1991). It appeared that C. arvensis patches were stable with respect to their location.…”

Section: Site-specific Herbicide Applicationmentioning

confidence: 96%

Spatial and temporal analysis of Convolvulus arvensis L. populations over four growing seasons

Jurado-Expósito

López‐Granados

González‐Andújar

et al. 2004

European Journal of Agronomy

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Intensive field surveys of Convolvulus arvensis were conducted over the course of four growing seasons (1999)(2000)(2001)(2002) in a 1.6 ha section of a field located in Andalusia, southern Spain, cropped with wheat in 1999 and 2001 and with sunflower in 2000 and 2002. In order to characterise the spatial and temporal variability of C. arvensis density, geostatistical techniques were used. Data from the study were used to design precise herbicide spraying. The density and spatial distribution of C. arvensis varied widely with years and crops. In general, weed density was higher in wheat years (30.41 and 53.72, in 1999 and 2001, respectively) than in sunflower ones (20.67 and 24.03, in 2000 and 2002, respectively). C. arvensis density data showed strong and moderate spatial dependence. The C. arvensis density maps achieved by kriging were used to estimate the percentage of surface susceptible to be treated with a site-specific herbicide treatment based on an estimated economic threshold (ET) for each year of study. The C. arvensis infested areas varied considerably between years and crops. About 33 and 64% of the total infested area were moderately infested (density > 14 plant m −2 ) in wheat in 1999 and 2001, respectively, and about 17 and 19% in sunflower years (2000 and 2002, respectively). During the years cropped with sunflower the percentage of the total area infested with C. arvensis was reduced and therefore the area exceeding the economic threshold (AEET). So, if a given herbicide were applied just only to the areas exceeding the economic threshold, the average reduction in herbicide cost achieved in sunflower years could be around 81%. These approaches demonstrated the importance of growing different crops in weed management outcome, and could be useful to farmers and researchers in formulating a multiple-season weed management plan, especially since C. arvensis has been shown to have relatively stable patches over time and crop rotations in no-tillage systems.

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Long‐term stability of distribution of Alopecurus myosuroides Huds. within cereal fields

Cited by 106 publications

References 7 publications

Extent and Implications of Weed Spatial Variability in Arable Crop Fields

Extent and Implications of Weed Spatial Variability in Arable Crop Fields

Machine-Vision Weed Density Estimation for Real-Time, Outdoor Lighting Conditions

Spatial and temporal analysis of Convolvulus arvensis L. populations over four growing seasons

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