The economic value of haying and green manuring in the integrated management of annual ryegrass and wild radish in a Western Australian farming system

2004 ◽  
Vol 44 (12) ◽  
pp. 1195 ◽  
Author(s):  
M. Monjardino ◽  
D. J. Pannell ◽  
S. B. Powles
Keyword(s):  
Weed Control ◽  
Herbicide Resistance ◽  
Weed Management ◽  
Integrated Management ◽  
Farming System ◽  
Integrated Weed Management ◽  
Annual Ryegrass ◽  
Wild Radish ◽  
Raphanus Raphanistrum ◽  
Green Manuring

Most cropping farms in Western Australia must deal with the management of herbicide-resistant populations of weeds such as annual ryegrass (Lolium rigidum) and wild radish (Raphanus raphanistrum). Farmers are approaching the problem of herbicide resistance by adopting integrated weed management systems, which allow weed control with a range of different techniques. These systems include non-herbicide methods ranging from delayed seeding and high crop seeding rates to the use of non-cropping phases in the rotation. In this paper, the Multi-species RIM (resistance and integrated management) model was used to investigate the value of including non-cropping phases in the crop rotation. Non-crop options investigated here were haying and green manuring. Despite them providing excellent weed control, it was found that inclusion of these non-cropping phases did not increase returns, except in cases of extreme weed numbers and high levels of herbicide resistance.

The economic value of pasture phases in the integrated management of annual ryegrass and wild radish in a Western Australian farming system

2004 ◽  
Vol 44 (3) ◽  
pp. 265 ◽  
Author(s):  
M. Monjardino ◽  
D. J. Pannell ◽  
S. B. Powles
Keyword(s):  
Herbicide Resistance ◽  
Weed Management ◽  
Integrated Management ◽  
Economic Value ◽  
Farming System ◽  
Integrated Weed Management ◽  
Continuous Cropping ◽  
Annual Ryegrass ◽  
Wild Radish ◽  
Raphanus Raphanistrum

Most cropping farms in Western Australia must deal with the management of herbicide-resistant populations of weeds such as annual ryegrass (Lolium rigidum Gaudin) and wild radish (Raphanus raphanistrum�L.). Farmers are approaching the problem of herbicide resistance by adopting integrated weed management systems, which allow weed control with a range of different techniques. One important question in the design of such systems is whether and when the benefits of including pasture in rotation with crops exceed the costs. In this paper, the multi-species resistance and integrated management model was used to investigate the value of including pasture phases in the crop rotation. The most promising of the systems examined appears to be so-called 'phase farming', involving occasional 3-year phases of pasture rather than shorter, more frequent and regular pasture phases. This approach was competitive with the best continuous cropping rotation in a number of scenarios, particularly where herbicide resistance was at high levels.

Influence of row spacing and cultivar selection on annual ryegrass (Lolium rigidum) control and grain yield in chickpea (Cicer arietinum)

2019 ◽  
Vol 70 (2) ◽  
pp. 140 ◽  
Author(s):  
Gulshan Mahajan ◽  
Kerry McKenzie ◽  
Bhagirath S. Chauhan
Keyword(s):  
Grain Yield ◽  
Cicer Arietinum ◽  
Weed Management ◽  
Integrated Management ◽  
Management Strategies ◽  
Integrated Weed Management ◽  
Row Spacing ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Narrow Row

Annual ryegrass (ARG) (Lolium rigidum Gaudin) is a problematic weed for chickpea (Cicer arietinum L.) production in Australia. Understanding the critical period of control of ARG in chickpea is important for developing effective integrated management strategies to prevent unacceptable yield loss. Experiments were conducted over 2 years at the research farm of the University of Queensland, Gatton, to evaluate the effect of chickpea row spacing (25 and 75cm) and cultivar (PBA Seamer and PBA HatTrick) and ARG infestation period (from 0, 3 and 6 weeks after planting (WAP), and weed-free) on ARG suppression and grain yield of chickpea. Year×treatment interactions were not significant for any parameter, and none of the treatment combinations showed any interaction for grain yield. Average grain yield was greater (20%) with 25-cm than 75-cm rows. On average, PBA Seamer had 9% higher yield than PBA HatTrick. Average grain yield was lowest in season-long weedy plots (562kg ha–1) and highest in weed-free plots (1849kg ha–1). Grain yield losses were lower when ARG emerged at 3 WAP (1679kg ha–1). Late-emerged ARG (3 and 6 WAP) had lower biomass (4.7–22.2g m–2) and number of spikes (5–24m–2) than ARG that emerged early; at 0 WAP, weed biomass was 282–337g m–2 and number of spikes 89–120m–2. Compared with wide row spacing, narrow row spacing suppressed ARG biomass by 16% and 52% and reduced number of spikes of ARG by 26% and 48% at 0 WAP and 3 WAP, respectively. PBA Seamer suppressed ARG growth more effectively than PBA HatTrick, but only in the season-long weedy plots. Our results imply that in ARG-infested fields, grain yield of chickpea can be increased by exploring narrow row spacing and weed-competitive cultivars. These cultural tools could be useful for developing integrated weed management tactics in chickpea in combination with pre-emergent herbicides.

Grain grower perceptions and use of integrated weed management

2004 ◽  
Vol 44 (10) ◽  
pp. 993 ◽  
Author(s):  
R. S. Llewellyn ◽  
R. K. Lindner ◽  
D. J. Pannell ◽  
S. B. Powles
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Economic Value ◽  
Cost Effective ◽  
Farming System ◽  
Integrated Weed Management ◽  
Management Decision ◽  
Herbicide Resistant ◽  
Management Decision Making

Greater adoption of integrated weed management, to reduce herbicide reliance, is an objective of many research and extension programmes. In Australian grain-growing regions, integrated weed management is particularly important for the management of herbicide resistance in weeds. In this study, survey data from personal interviews with 132 Western Australian grain growers are used to characterise the use and perceptions of integrated weed management practices. The main objective was to identify opportunities for improved weed management decision making, through targeted research and extension. The extent to which integrated weed management practices are used on individual farms was measured. Perceptions of the efficacy and reliability of various weed management practices were elicited for control of annual ryegrass (Lolium rigidum Gaud.), along with perceptions of the economic value of integrated weed management practices relative to selective herbicides. All growers were shown to be using several integrated weed management practices, although the use of some practices was strongly associated with the presence of a herbicide-resistant weed population. In general, both users and non-users were found to have high levels of awareness of integrated weed management practices and their weed control efficacy. Herbicide-based practices were perceived to be the most cost-effective. Opportunities for greater adoption of integrated weed management practices, to conserve the existing herbicide resource, exist where practices can be shown to offer greater shorter-term economic value, not necessarily just in terms of weed control, but to the broader farming system.

scholarly journals Integrated Management of Weeds in Direct-Seeded Rice in Cambodia

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1557
Author(s):  
Robert Martin ◽  
Bunna Som ◽  
Joel Janiya ◽  
Ratha Rien ◽  
Sophea Yous ◽  
...  
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Rice Field ◽  
Field Experiments ◽  
Integrated Management ◽  
Weed Suppression ◽  
Crop Damage ◽  
Integrated Weed Management ◽  
Crop Tolerance ◽  
Direct Seeded

The objective of this work was to determine the value of improved establishment methods and herbicide applications as alternatives to high seeding rates to improve weed suppression in rice. Field experiments were carried out in 2010 and 2011 to determine optimal seeding rates and seeding methods with and without weed competition in wet-seeded rice. Under wet seeding conditions, drum seeding at 80 kg ha−1 was the most profitable treatment for both weed-free and unweeded rice. Although pre-emergence herbicides are beginning to be adopted in wet-seeded rice, they are seldom used in dry direct-seeded rice in Cambodia. Experiments were carried out in 2018 and 2019 to test crop tolerance and the efficacy of butachlor, oxadiazon, pendimethalin and pretilachlor applied post-sowing and pre-emergence to dry direct-seeded rice. Oxadiazon and butachlor, with the option for a post-emergence herbicide, provided effective weed control and a high grain yield in dry direct-seeded rice. Pretilachlor did not effectively control weeds under dry seeding conditions. Although pendimethalin exhibited good weed control, crop damage was a risk in poorly prepared seedbeds which typify Cambodian rice systems. With an effective integrated weed management strategy, it might be possible to safely reduce seeding rates below 80 kg ha−1 using drum or drill seeding machines.

scholarly journals First Report of Cercospora tripolitana Causing Leaf Spot of Emex spinosa in Tunisia

Plant Disease ◽  
2009 ◽  
Vol 93 (7) ◽  
pp. 763-763 ◽  
Author(s):  
L. G. Kammoun ◽  
T. Souissi
Keyword(s):  
New York ◽  
Weed Control ◽  
Weed Management ◽  
Farming System ◽  
Integrated Weed Management ◽  
Northern Tunisia ◽  
First Report ◽  
Leaf Spots ◽  
Pure Cultures ◽  
Water Plants

Emex spinosa (L.) is a common weed in cereal crops and pastures in northern Tunisia. The build up of the seed bank from a cropping-grazing farming system makes chemical and cultural controls inefficient. Biological control as part of integrated weed management may improve weed control. Diseased seedlings were collected from several locations in northern Tunisia during field surveys. Symptoms were small, circular, light brown leaf spots varying in size (1.75 to 3.5 mm in diameter) with a definite dark brown border on both sides of leaves that wilted and died. Microscopic observations showed conidiophores and conidia within and around the spots. Pure cultures from single conidia were obtained on carrot leaf extract agar. The fungus was identified as Cercospora tripolitana on the basis of identification keys described by Chupp (1). Conidia, borne on unbranched, fasciculated conidiophores, were elongate, hyaline, multiseptate, 110 to 150 × 1.8 to 3.7 μm (average 130 to 2.5 μm), and had truncate bases. For pathogenicity testing, six plants were sprayed with a spore suspension of 6 × 105 conidia/ml. Controls were sprayed with sterile distilled water. Plants were placed in a growth chamber at 22°C, 95% relative humidity, and 18/6 h of light/dark and monitored for symptoms. Ten days after inoculation, symptoms identical to those observed in the field were observed on inoculated plants. Control plants did not develop any symptoms. Four weeks later, diseased leaves turned yellow and died. The fungus was reisolated from symptomatic plants according to Koch's postulates. Although C. tripolitana has been previously reported in North and South Africa, to our knowledge, this is the first report of the fungus as a pathogen on E. spinosa under Tunisian agroecological conditions, making it a promising candidate for weed control. Reference: (1) C. Chupp. A Monograph of the Fungus Genus Cercospora. C. Chupp, Ithaca, New York, 1953.

scholarly journals Herbicide Resistance: Another Hot Agronomic Trait for Plant Genome Editing

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 621
Author(s):  
Amjad Hussain ◽  
Xiao Ding ◽  
Muna Alariqi ◽  
Hakim Manghwar ◽  
Fengjiao Hui ◽  
...  
Keyword(s):  
Genome Editing ◽  
Weed Control ◽  
Herbicide Resistance ◽  
Weed Management ◽  
Crop Productivity ◽  
Control Measures ◽  
Plant Genome ◽  
Integrated Weed Management ◽  
Leading Role ◽  
The Impact

Weeds have continually interrupted crop plants since their domestication, leading to a greater yield loss compared to diseases and pests that necessitated the practice of weed control measures. The control of weeds is crucial to ensuring the availability of sufficient food for a rapidly increasing human population. Chemical weed control (herbicides) along with integrated weed management (IWM) practices can be the most effective and reliable method of weed management programs. The application of herbicides for weed control practices calls for the urgency to develop herbicide-resistant (HR) crops. Recently, genome editing tools, especially CRISPR-Cas9, have brought innovation in genome editing technology that opens up new possibilities to provide sustainable farming in modern agricultural industry. To date, several non-genetically modified (GM) HR crops have been developed through genome editing that can present a leading role to combat weed problems along with increasing crop productivity to meet increasing food demand around the world. Here, we present the chemical method of weed control, approaches for herbicide resistance development, and possible advantages and limitations of genome editing in herbicide resistance. We also discuss how genome editing would be effective in combating intensive weed problems and what would be the impact of genome-edited HR crops in agriculture.

scholarly journals Upgrading the RIM Model for Improved Support of Integrated Weed Management Extension Efforts in Cropping Systems

2014 ◽  
Vol 28 (4) ◽  
pp. 703-720 ◽  
Author(s):  
Myrtille Lacoste ◽  
Stephen Powles
Keyword(s):  
Herbicide Resistance ◽  
Weed Management ◽  
Cropping Systems ◽  
Integrated Management ◽  
Integrated Weed Management ◽  
Weed Species ◽  
Management Options ◽  
Rigid Ryegrass ◽  
And Control

RIM, or “Ryegrass Integrated Management,” is a user-friendly weed management software that integrates long-term economics. As a model-based decision support system, RIM enables users to easily build 10-year cropping scenarios and evaluate the impacts of management choices on annual rigid ryegrass populations and long-term profitability. Best used in a workshop format to enable learning through interactions, RIM can provide insights for the sustainable management of ryegrass through “what-if” scenarios in regions facing herbicide resistance issues. The upgrade of RIM is presented, with changes justified from an end-user perspective. The implementation of the model in a new, intuitive software format is presented, as well as the revision, update, and documentation of over 40 management options. Enterprises, establishment systems, and control options were redefined to represent current practices, with the notable inclusion of customizable herbicide options and techniques for weed seed control at harvest. Several examples of how RIM can be used with farmers to demonstrate the benefits of adopting recommended practices for managing or delaying the onset of herbicide resistance are presented. Originally designed for the dryland broadacre systems of the Australian southern grainbelt, RIM's underlying modeling was restructured to facilitate future updates and adaptation to other weed species and cropping regions.

scholarly journals Weed control and soybean agronomic performance in response to application of sulfentrazone + diuron in pre-emergence

2021 ◽  
Vol 17 (3) ◽  
pp. 70-82
Author(s):  
Washington Louis Franklin Termineles Zacharias ◽  
Pedro Henrique Caldeirão Pierro ◽  
Guilherme Mendes Pio Oliveira ◽  
Rubia Fernanda Bovo ◽  
Leonardo Giorgiani Zarelli ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Weed Control ◽  
Weed Management ◽  
Good Alternative ◽  
Agronomic Performance ◽  
Wild Radish ◽  
Raphanus Raphanistrum ◽  
History Of ◽  
Rottboellia Cochinchinensis

The use of pre-emergent herbicides is an important tool in weedmanagement. Sulfentrazone + diuron mixture was recently launched ontothe market. The objectiveof this work was to evaluate the weed control and the agronomic performance of soybean in response to application of sulfentrazone + diurondoses in pre-emergence. The experiment was conducted in Londrina PR, in an oxisol. The treatments were doses ofsulfentrazone + diuron (62 + 123, 123 + 245, 184 + 368, 245 + 490, 306 + 613 e 368 + 735 g a.i.ha-1). In addition to these treatments, isolated applications of sulfentrazone (245 g a.i.ha-1) and diuron (490 g a.i.ha-1) were evaluated, as well as a weedyand aweed-freecontrol. For the weed control, the wild radish(Raphanus raphanistrum)and itchgrass (Rottboellia cochinchinensis) emergencewere evaluated. In soybean, photosystem II (PSII)activity, stand, plant height, number of podsper plant, height of insertion of the first pod, number of nodes per plant, mass of a thousand grains and grain yield were evaluated. Results show that the mixture of sulfentrazone + diuron resulted in less than 50% wild radish control, regardless of the dose evaluated. However, for itchgrass, the control was greater than 90% in doses from 123 g sulfentrazone + 245g diurona.i.ha-1. Regarding thesoybeancrop, in doses from 245 g sulfentrazone + 490 g diuron a.i. ha-1 there was a greater number of pods per plant and higher grain yield, of about3,000 kg ha-1. The application of herbicides led to a transient inhibition of PSIIactivity, which did not result in a reduction in crop grainyield, indicating plant recovery. Therefore, the mixture of sulfentrazone + diuron is a good alternative for the weed management in pre-emergence of soybean, and should be positioned according to the history of fieldinfestation.

Integrated Weed Management systems allow reduced reliance on herbicides and long-term weed control

2009 ◽  
Vol 132 (3-4) ◽  
pp. 237-242 ◽  
Author(s):  
R. Chikowo ◽  
V. Faloya ◽  
S. Petit ◽  
N.M. Munier-Jolain
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Management Systems ◽  
Integrated Weed Management
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