Perennial Weeds

Hatcher, P. E.; Froud-Williams, R. J.

doi:10.1002/9781119380702.ch13

Weed Research 2017

DOI: 10.1002/9781119380702.ch13

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Perennial Weeds

P. E. Hatcher¹,

R. J. Froud-Williams²

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Cited by 4 publications

(1 citation statement)

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“…Buhler et al (1994) suggest that management of established perennial weeds in reduced tillage fields is ineffective and may increase the spread of roots with vegetative reproduction. Hatcher (2017) reported changes in weed floras associated with reduced-tillage systems and cited, the increase of monocot and dicot species in the absence of tillage. Thereby, perennial weed dominance excludes floristically abundant annual species (Boatman et al 2011);however, Buhler (1995) advises exercising caution before making statements of an increase of perennial weeds because the situation can vary among sites as a result of interactions of tillage with weed management practices, the environment, and initial perennial weed populations.…”

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confidence: 99%

Weed community of no-till avocado (Persea americana Mill.) crops in tropical highlands

Castañeda Sánchez,

Barrera Betancourth

2023

Rev. Fac. Nac. Agron. Medellín

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No-till avocado orchards in the highlands are gaining importance in eastern Antioquia, Colombia. To evaluate the influence of management, and edaphic properties on the composition of weed communities, 50 Hass avocado orchards were studied in nine municipalities of eastern Antioquia. The variables cover and presence of weeds were used to estimate relative frequency, dominance, and Importance Value (IV); weed management was characterized by a survey. The maximum moisture retention capacity and pH of the soil were also determined. The importance of species, rotation of management strategies, and herbicides were analyzed graphically. The association between weeds dominance, and factors, was evaluated by a generalized linear model. 66 dicots and 28 monocot weeds were classified. Out of the 10 most important species, three foreign species, Melinis minutiflora P. Beauv, Digitaria horizontalis Willd, and Pennisetum clandestinum Hoschst. Ex Chiov were the most representative. The municipalities are grouping the effects of similar management strategies in the territory. Chemical management favored the equilibrium of the weed composition, while mechanical management did not. Soil properties had less influence on the distribution and dominance of weeds.

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confidence: 99%

Weed community of no-till avocado (Persea americana Mill.) crops in tropical highlands

Castañeda Sánchez,

Barrera Betancourth

2023

Rev. Fac. Nac. Agron. Medellín

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Disturbances by the European ground squirrel enhance diversity and spatial heterogeneity of plant communities in temperate grassland

et al. 2019

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The effects of desiccation on broad‐leaved dock (Rumex obtusifolius) and curled dock (Rumex crispus) root fragment regeneration

Alshallash

Hatcher

2020

Weed Biology and Management

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Fresh root fragments of Rumex crispus and Rumex obtusifolius, which initially contain 65–70% moisture, progressively lose moisture when desiccated under conditions matching summer weather in southeast England. The likelihood of shoot emergence and the time it took in glasshouse conditions were both affected by desiccation, with R. crispus the most affected up to 48 hr and R. obtusifolius slower to emerge after 48 hr. These effects converged after longer desiccation periods, and R. crispus entirely failed to emerge after 120 hr. The dry weight of emerged shoots was not significantly different between the species until they were desiccated for 96 hr, after which R. obtusifolius dry weight was significantly reduced. In outdoor trials, desiccation for 24 or 48 hr had a lesser effect on emergence in either species when fragments were planted at the soil surface or at up to a depth of 10 cm, compared to deeper plantings, but emergence was significantly lower in plantings at 15 or 20 cm. Emergence delays were not significantly different between the species until they were planted at 15 or 20 cm, when R. obtusifolius was slower to emerge than R. crispus, an effect exacerbated by increasing desiccation. Similar interactions of increasing soil depth and desiccation were found in reductions in dry weight, number of tillers and leaf area, with R. obtusifolius generally, but not exclusively, better able to withstand more extreme trial conditions. Our findings suggest that control of these highly troublesome weeds can be assisted by appropriate agricultural practices, notably exposing cut fragments to drying conditions followed by deep burial.

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Perennial Weeds

Cited by 4 publications

References 124 publications

Weed community of no-till avocado (Persea americana Mill.) crops in tropical highlands

Weed community of no-till avocado (Persea americana Mill.) crops in tropical highlands

Disturbances by the European ground squirrel enhance diversity and spatial heterogeneity of plant communities in temperate grassland

The effects of desiccation on broad‐leaved dock (Rumex obtusifolius) and curled dock (Rumex crispus) root fragment regeneration

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