Comparison of the NegFry decision suport system with routine fungicide application for the control of potato late blight in Ireland

Leonard, Ria T.; Dowley, L. J.; Rice, Barry; Ward, Shane

doi:10.1007/bf02358593

Cited by 18 publications

(5 citation statements)

References 4 publications

(3 reference statements)

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“…The PC-NegFry system was developed in the early 1990s and was tested in all the Nordic countries during 1993-1996(Hansen et al 1995Hermansen and Amundsen 2003). Subsequently, it was also tested in several other countries in Europe (Hansen et al 2000(Hansen et al , 2002Leonard et al 2001). Further development of PC-NegFry stopped in 2002, but modified versions of NegFry are now in use via the Internet in all Nordic countries.…”

Section: Nordic Countriesmentioning

confidence: 99%

Epidemiology and Integrated Control of Potato Late Blight in Europe

et al. 2011

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Phytophthora infestans, the causal agent of late blight, is a major threat to potato production in northwestern Europe. Before 1980, the worldwide population of P. infestans outside Mexico appeared to be asexual and to consist of a single clonal lineage of A1 mating type characterized by a single genotype. It is widely believed that new strains migrated into Europe in 1976 and that this led to subsequent population changes including the introduction of the A2 mating type. The population characteristics of recently collected isolates in NW Europe show a diverse population including both mating types, sexual reproduction and oospores, although differences are observed between regions. Although it is difficult to find direct evidence that new strains are more aggressive, there are several indications from experiments and field epidemics that the aggressiveness of P. infestans has increased in the past 20 years. The relative importance of the different primary inoculum sources and specific measures for reducing their role, such as covering dumps with plastic and preventing seed tubers from becoming infected, is described for the different regions. In NW Europe, varieties with greater resistance tend not to be grown on a large scale. From the grower's perspective, the savings in fungicide input that can be achieved with these varieties are not compensated by the higher (perceived) risk of blight. Fungicides play a crucial role in the integrated control of late blight. The spray strategies in NW Europe and a table of the specific attributes of the most important fungicides in Europe are presented. The development and use of decision support systems (DSSs) in NW Europe are described. In The Netherlands, it is estimated that almost 40% of potato growers use recommendations based on commercially available DSS. In the Nordic countries, a new DSS concept with a fixed 7-day spray interval and a variable dose rate is being tested. In the UK, commercially available DSSs are used for c. 8% of the area. The validity of Smith Periods for the new population of P. infestans in the UK is currently being evaluated.

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Section: Nordic Countriesmentioning

confidence: 99%

Epidemiology and Integrated Control of Potato Late Blight in Europe

et al. 2011

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“…Potato late blight, which is caused by Phytophthora infestans, is one of the most destructive potato diseases worldwide (Leonard et al, 2001;Ristaino, 2002). The potential risk of disease development and consequent yield losses depends in part on the aerial transport of P. infestans sporangia to potato fields from off-field sources (Aylor et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variation in airborne sporangia of Phytophthora infestans: characterization and initiatives towards improving potato late blight risk estimation

et al. 2014

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This study investigated the value of using real-time monitoring of Phytophthora infestans airborne inoculum as a complement to decision support systems (DSS). The experiment was conducted during the 2010, 2011 and 2012 potato production seasons in two locations in New Brunswick, Canada. Airborne sporangia concentrations (ASC) of P. infestans were monitored using 16 rotating-arm spore samplers placed 3 m above the ground. The first cases of late blight (2010 and 2011) were detected 6-7 days after the first ASC peak, and all samplers captured their first sporangia within the same week (at 3-and 9-day periods). The cumulative ASC curve and the risk curves from two DSS (PLANT-Plus and Pameseb Late Blight) had the same shape but different magnitudes. In both locations, the negative binomial distribution fitted the data better than the Poisson distribution, which is indicative of heterogeneity, and based on Taylor's power law, the heterogeneity increased with increasing ASC. Therefore, the present results suggest that spore-sampling network devices may be a suitable approach for early detection of incoming inoculum and, when combined with DSS, represent a potential aid for targeting the optimal time to apply a disease-control product. In this context, cumulative ASC can be a counterweight to the DSS risk estimate: a high risk combined with significant ASC will trigger fungicide spraying. Moreover, spore sampling can be used to assess the efficiency of management strategies by means of examining the area under the inoculum progress curve.

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“…1) is a 2,6-binitroaniline fungicide developed by Ishihara Sangyo Kaisha Ltd., Japan. Fluazinam has high activity against Alternaria, Botrytis, Phytophthora, Plasmppara and Sclerotinia and widely used for protecting strawberry, pepper, peach, potato, tomato, bean, peanut and other products in all over the world [1][2][3][4][5] . Fluazinam can also be used for control vegetarian acarid and crucifer clubroot 6,7 .…”

Section: Introductionmentioning

confidence: 99%

Residue Analysis and Dissipation of Fluazinam in Apple Under Field Conditions

Wu¹,

Zhenlong²,

Pan³

et al. 2014

Asian J. Chem.

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The analytical method for determining the residue of fluazinam and its dissipation in apple with gas chromatography-electronic capture detector (GC-ECD) was developed. At fortification levels of 0.01, 0.05, 0.5 mg/kg in apple, it was shown that the average recoveries ranged from 94.5 to 102.7 % with relative standard deviations (RSDs) of 1.1 to 3.7 % (n = 5). The limit of detection (LOD) and the limit of quantification (LOQ) of the method for fluazinam in apple were 0.003 mg/kg and 0.01 mg/kg, respectively. The half-lives of fluazinam in apple were 4.15-9.68 days and the terminal residues of fluazinam in apple were below maximum residue limits (MRLs) legislated 0.3 mg/kg by European Union at 28 days after the last spraying in three locations under open field ecosystems.

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Comparison of the NegFry decision suport system with routine fungicide application for the control of potato late blight in Ireland

Cited by 18 publications

References 4 publications

Epidemiology and Integrated Control of Potato Late Blight in Europe

Epidemiology and Integrated Control of Potato Late Blight in Europe

Spatiotemporal variation in airborne sporangia of Phytophthora infestans: characterization and initiatives towards improving potato late blight risk estimation

Residue Analysis and Dissipation of Fluazinam in Apple Under Field Conditions

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