Critical period of weed control in transplanted chilli pepper

Amador-Ramirez,

doi:10.1046/j.0043-1737.2002.00278.x

Cited by 47 publications

(11 citation statements)

References 21 publications

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“…An effective weed control has been found to be profitable also for short crop cycle vegetables as transplanted fennel. As reported by other Authors to prevent losses in total and marketable yields, weeds should be removed early after crop transplanting (Amador-Ramirez, 2002) by hoeing. To avoid the invasive weed emergence after transplanting, which is a topic under traditional organic system, a pre transplanting strategy must be used.…”

Section: Crop Yieldmentioning

confidence: 99%

Management Filters and Species Traits: Weed Community Assembly in Long-Term Organic and Conventional Systems

et al. 2010

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Community assembly theory provides a useful framework to assess the response of weed communities to agricultural management systems and to improve the predictive power of weed science. Under this framework, weed community assembly is constrained by abiotic and biotic “filters” that act on species traits to determine community composition. We used an assembly approach to investigate the response of weed seed banks to 25 yr of management-related filtering in three different row-crop management systems in southeastern Pennsylvania: organic manure-based, organic legume-based, and conventional. Weed seed banks were sampled in April of 2005 and 2006 and quantified by direct germination in a greenhouse. We also assessed the filtering effects of weed management practices and relationships between assembled seed bank and emergent weed communities by allowing or excluding weed control practices within each management system and measuring emergent weed community response. Germinable weed seed bank densities and species richness in the final year of the study were over 40% and 15% higher, respectively, in the organic systems relative to the conventional system. Seed bank community structure in the organic systems was different from the conventional system, and the relationships between assembled seed banks and the emergent flora varied. Primary tillage, weed control, timing of planting, and fertility management appeared to be the main filters that differentiated weed seed banks in the three systems. Weed life history, emergence periodicity, seed size, and responsiveness to soil fertility and hydrology appeared to be the most important functional traits determining how weed species responded to management-related filters. Our results suggest that management systems can exert strong filtering effects that can persist over relatively long (greater than one growing season) time scales. Legacy effects of community-level filtering might be more important than previously assumed, and should be incorporated into predictive models of weed community assembly.

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Section: Crop Yieldmentioning

confidence: 99%

Management Filters and Species Traits: Weed Community Assembly in Long-Term Organic and Conventional Systems

et al. 2010

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“…[16]. Moreover, a weed-free period of 12.2 weeks was needed by chili pepper (C. annum) to avoid a yield decrease of more than 5% [35]. Yield of the tomato (Solanum lycopersicum L.) was decreased by 48%-71% when the vegetable plants were growing in competition with weeds such as large crabgrass (Digitaria sanguinalis (L.) Scop.…”

Section: Yield Losses Caused By Weeds In Vegetable Cropsmentioning

confidence: 99%

Non-Chemical Weed Management in Vegetables by Using Cover Crops: A Review

et al. 2020

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Vegetables are a substantial part of our lives and possess great commercial and nutritional value. Weeds not only decrease vegetable yield but also reduce their quality. Non-chemical weed control is important both for the organic production of vegetables and achieving ecologically sustainable weed management. Estimates have shown that the yield of vegetables may be decreased by 45%–95% in the case of weed–vegetable competition. Non-chemical weed control in vegetables is desired for several reasons. For example, there are greater chances of contamination of vegetables by herbicide residue compared to cereals or pulse crops. Non-chemical weed control in vegetables is also needed due to environmental pollution, the evolution of herbicide resistance in weeds and a strong desire for organic vegetable cultivation. Although there are several ways to control weeds without the use of herbicides, cover crops are an attractive choice because these have a number of additional benefits (such as soil and water conservation) along with the provision of satisfactory and sustainable weed control. Several cover crops are available that may provide excellent weed control in vegetable production systems. Cover crops such as rye, vetch, or Brassicaceae plants can suppress weeds in rotations, including vegetables crops such as tomato, cabbage, or pumpkin. Growers should also consider the negative effects of using cover crops for weed control, such as the negative allelopathic effects of some cover crop residues on the main vegetable crop.

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“…Knowledge about the influence of weed infestation on crop yield losses is essential for the proper timing of weed control and therefore for efficient herbicide use. The most common experiments evaluating crop losses due to weed competition are those used to determine the critical period for weed control (CPWC) (Amador‐Ramirez, 2002; Knezevic et al. , 2002; Evans et al.…”

Section: Introductionmentioning

confidence: 99%

Validation of a model relating yield loss to weed time of emergence and removal in traditional and early‐sown maize

et al. 2010

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In northern Italy, there has been a tendency in recent years to advance maize sowing from mid-April to mid- March. This may lead to many agronomic advantages but can strongly influence weed flora composition, density, time of emergence, and crop and weed relative growth. Altering the maize sowing date thus requires a better understanding of the competitive relationship between crop and weeds. This study evaluates an existing model expressing crop yield as a function of maximum yield of the weed-free crop, weed competitive load and time of weed emergence and removal. The model can predict the yield loss caused by mixed infestations with a single set of parameters. The aim of this study was to validate this model with independent data from experiments on early and traditionally sown maize, in support of the idea that the model is robust enough to be used as a prediction tool for forecasting yield losses in a variety of conditions created by different sowing dates. In traditional sowing, the plot of expected versus observed yields showed that the model gives a good fit. However, for early sowing, the model accuracy in predicting crop yields was improved when the curve intercepts were shifted by 60 growing degree days (d C). This shift corresponded to the difference between the onset of weed emergence in traditional and early sowing, which suggests that weeds may be less competitive when maize is sown earlie

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Critical period of weed control in transplanted chilli pepper

Cited by 47 publications

References 21 publications

Management Filters and Species Traits: Weed Community Assembly in Long-Term Organic and Conventional Systems

Management Filters and Species Traits: Weed Community Assembly in Long-Term Organic and Conventional Systems

Non-Chemical Weed Management in Vegetables by Using Cover Crops: A Review

Validation of a model relating yield loss to weed time of emergence and removal in traditional and early‐sown maize

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