Assessing eradication strategies for rain-splashed and wind-dispersed crop diseases

Bennett, James; Diggle, Art; Evans, F.; Renton, Michael

doi:10.1002/ps.3459

Cited by 5 publications

(5 citation statements)

References 33 publications

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“…This means that the possibility for local extinction of resistance alleles will be much higher than if the population is considered to be large and spatially homogenous. Spatially explicit herbicide resistance modelling should learn from the rich field of spatially explicit modelling of dispersal and population dynamics that has already been employed in a diverse range of fields, including invasion biology, pest management, gene flow from transgenic crops and conservation . Fortunately, recent empirical work is already providing valuable information on the dispersal of pollen and seeds that will help to inform these models .…”

Section: The Road Aheadmentioning

confidence: 99%

Herbicide resistance modelling: past, present and future

Renton

Busi

Neve

et al. 2014

Pest Management Science

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Computer simulation modelling is an essential aid in building an integrated understanding of how different factors interact to affect the evolutionary and population dynamics of herbicide resistance, and thus in helping to predict and manage how agricultural systems will be affected. In this review, we first discuss why computer simulation modelling is such an important tool and framework for dealing with herbicide resistance. We then explain what questions related to herbicide resistance have been addressed to date using simulation modelling, and discuss the modelling approaches that have been used, focusing first on the earlier, more general approaches, and then on some newer, more innovative approaches. We then consider how these approaches could be further developed in the future, by drawing on modelling techniques that are already employed in other areas, such as individual-based and spatially explicit modelling approaches, as well as the possibility of better representing genetics, competition and economics, and finally the questions and issues of importance to herbicide resistance research and management that could be addressed using these new approaches are discussed. We conclude that it is necessary to proceed with caution when increasing the complexity of models by adding new details, but, with appropriate care, more detailed models will make it possible to integrate more current knowledge in order better to understand, predict and ultimately manage the evolution of herbicide resistance.

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Section: The Road Aheadmentioning

confidence: 99%

Herbicide resistance modelling: past, present and future

Renton

Busi

Neve

et al. 2014

Pest Management Science

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“…Para as espécies anuais, a doença assumiu proporções preocupantes em 1996/97 na Austrália, em L. albus pela maior susceptibilidade desta espécie e em L. angustifolius pela grande importância económica da cultura de plantas desta espécie, que na altura se encontrava em grande expansão, ultrapassando 1.000.000 ha, sobretudo na Austrália Ocidental . A erradicação da doença foi na altura inviabilizada pela manutenção do inóculo em plantas espontâneas (anteriormente introduzidas) de L. cosentinii (Shea et al, 2008;Bennett et al, 2013). A doença foi assinalada na África do Sul em 1996(van der Mey et al, 1996.…”

Section: Introductionunclassified

Avaliação da resistência à antracnose em germoplasma de Lupinus spp.

Talhinhas¹,

Neves-Martins²,

Oliveira³

2016

Rev. Ciênc. Agr.

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R E S U M OUma das principais limitações à cultura de tremoceiros (pertencentes a várias espécies de Lupinus) em diversas partes do mundo resulta da sua suscetibilidade à antracnose, uma doença causada pelo fungo Colletotrichum lupini. Ao afetar o caule principal, esta doença pode causar a morte da planta, levando a perdas de produção frequentemente elevadas. A doença foi reportada apenas recentemente e a reduzida variabilidade genética do seu agente causal sugere uma origem recente do fungo. Pelo contrário, a grande riqueza genética encontrada no germoplasma de diversas espécies de Lupinus, algumas das quais tendo o território português como parte significativa da sua área de distribuição natural, impele estudos com vista à caracterização do grau de resistência a esta doença em acessos desse germoplasma. Após análise duma coleção de germoplasma contendo 51 acessos de Lupinus albus, 46 de L. angustifolius, 19 de L. luteus e 10 de L. mutabilis, através de inoculações em condições artificiais, foi identificado germoplasma de L. albus e de L. angustifolius com níveis promissores de resistência, respetivamente em variedades tradicionais e em germoplasma espontâneo português. O estudo do efeito da doença nos componentes da produção, em condições de campo, revelou que o número de vagens por infrutescência foi o componente da produção mais afetado, ilustrando um elevado aborto floral atribuído à doença. Estes resultados permitem uma utilização mais informada do germoplasma das espécies de Lupinus estudadas nos respetivos programas de melhoramento de plantas. Palavras-chave: tremoceiro; Lupinus; Colletotrichum lupini; Colletotrichum acutatum; antracnose. A B S T R A C TAnthracnose, caused by the fungus Colletotrichum lupini, is one of the main limitations to the cultivation of several lupin species in different parts of the world. Affecting the main stem, this disease may cause plant death, leading to frequently high yield losses. This disease was reported only recently and the narrow genetic diversity of its pathogen suggests a recent origin for this fungus. On the contrary, the vast genetic richness found in the germplasm of diverse Lupinus species, some of them having the Portuguese territory as important component of their natural distribution areas, call for the study targeting the characterisation of disease resistance in such germplasm accessions. The analysis of a germplasm collection comprising 51 Lupinus albus, 46 L. angustifolius, 19 L. luteus and 10 L. mutabilis accessions using artificial inoculation conditions pointed out L. albus and L. angustifolius accessions with promising levels of resistance, on Portuguese landraces and wild germplasm respectively. Under field conditions, the effect of the disease on yield components affected mostly the number of pods per pod set, suggesting a high flower abortion due to the disease. These results enable a more informed use of the germplasm of these Lupinus species on the respective breeding programmes.

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“…Commission implementing decision (EU) 2015/789 Articles 6 and 7 outline host removal as part of the overall phytosanitary measures aimed at, respectively, eradication and containment of X. fastidiosa within specified areas of the EU. Host plant removal is a widely adopted control measure and element of phytosanitary interventions to contain or eradicate a pest from a given area (Mumford, 2006;Thomson, 2006;Sosnowski et al, 2009;Belasque et al, 2010;de Boer and Boucher, 2011;Filipe et al, 2012;Gordillo et al, 2012;Palacio-Bielsa et al, 2012;Sosnowski et al, 2012;Bennett et al, 2013;Su et al, 2013;Behlau et al, 2014;Cunniffe et al, 2014 and2015;Gottwald and Graham, 2014;MacMaster et al, 2015;NTG, 2015;Rimbaud et al, 2015). The effectiveness of containment and eradication depends on a range of epidemiological factors (Pluess et al, 2012) and, in particular, on the degree of pathogen invasion which is reflected by the number and density of infection foci at the onset of a control programme.…”

Section: Xylella Fastidiosa and Koch's Postulatesmentioning

confidence: 99%

Four statements questioning the EU control strategy against Xylella fastidiosa

Bragard¹,

Caffier²,

Candresse³

et al. 2016

EFS2

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This opinion addresses questions concerning the EU control strategy against Xylella fastidiosa: i) factors affecting symptom expression and spread of X. fastidiosa; ii) the aetiology of the CoDiRO (Complesso del Disseccamento Rapido dell'Olivo) disease; iii) host plant removal as an option for containment or eradication; and iv) secondary effects of pesticides. Xylella fastidiosa subsp. pauca was shown to be the causal agent of the CoDiRO disease of olives by recent biological assays fulfilling Koch's postulates. Symptoms in X. fastidiosa infected plants develop because of wilting from water stress induced by bacteria clogging the xylem vessels. Therefore, interventions supporting vigorous growth and development of the plant may improve its health status, its resilience, prolong its productive phase and extend the symptomless phase of the disease. The Panel considers removal of infected plants, in a system‐based approach, as the only option to prevent further spread of the pathogen to new areas. In the outer strip of the containment area bordering the buffer zone, removal of infected plants and stringent monitoring can be effective in preventing pathogen spread into the buffer zone. In areas of recent introduction, such as new outbreaks in the buffer zone, the stringent removal of both infected plants and all host plants irrespective of their health status within a radius, as described in current EU legislation, can be effective in reducing pathogen spread, when rigorously administered and new infections are detected in time. Finally, the reduction of vector populations by application of chemical or biological means, mechanical treatments, or other sustainable methods, can have effects in slowing down the pathogen spread. Concerning the use of pesticides, there is currently no evidence of negative effects of such treatments on the interaction of X. fastidiosa with infected olive trees, the severity of symptoms and the outcome of the infection.

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Assessing eradication strategies for rain-splashed and wind-dispersed crop diseases

Abstract: A failed eradication attempt can be costly, and a simple set of indicators for the likelihood of success is extremely useful. These indicators can aid decision-makers when faced with a new incursion, identifying when there is little hope of success. © 2012 Society of Chemical Industry.

Cited by 5 publications

References 33 publications

Herbicide resistance modelling: past, present and future

Herbicide resistance modelling: past, present and future

Avaliação da resistência à antracnose em germoplasma de Lupinus spp.

Four statements questioning the EU control strategy against Xylella fastidiosa

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