Predicting Soybean Rust Incursions into the North American Continental Interior Using Crop Monitoring, Spore Trapping, and Aerobiological Modeling

Isard, Scott A.; Barnes, Charles W.; Hambleton, Sarah; Ariatti, Annalisa; Russo, Joseph M.; Tenuta, Albert; Szabo, Les J.

doi:10.1094/pdis-01-11-0034

Cited by 53 publications

(48 citation statements)

References 21 publications

(3 reference statements)

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“…As a result, rare events at a lower scale can be predicted at a higher scale, e.g. under which climatic conditions new soybean rusts from South America can be expected in North America (Isard et al 2011).…”

Section: Introduction: the Fascinating Complexity Of Ecosystemsmentioning

confidence: 99%

Chance, Variation and the Nature of Causality in Ecological Communities

Kroon

Jongejans

2016

The Frontiers Collection

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Chance is pervasive in nature. Erratic events such as storms and fires can cause major damage to an ecosystem. Rare successful long distance dispersal events like a viable seed landing in just the right habitat can form the stepping stone for range expansion of a plant species. Illustrated with two examples we argue that in ecology chance events are scale-dependent. We show how random stochastic variation in species interactions may result in relative stability at a higher community level. In other systems the reverse may take place, in which deterministic interactions result in unpredictable chaotic dynamics. Analysing the processes and dynamics at these different scales has led to an increasing mechanistic understanding of the variation in ecological communities in space and time. Unambiguous identification of cause and effect relations from this work is of the greatest importance, as many ecosystems in the world are not amenable to experimentation. This work should form the scientific basis for identifying the threats to ecosystems and defining proper conservation and mitigation measures.

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Section: Introduction: the Fascinating Complexity Of Ecosystemsmentioning

confidence: 99%

Chance, Variation and the Nature of Causality in Ecological Communities

Kroon

Jongejans

2016

The Frontiers Collection

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“…sugarcane producing regions in Brazil, as well as by the long-distance dispersion ability of urediniospores, either following single aerial transport events or stepwise range expansion into new regions (Isard et al, 2011). The genetic diversity of P. melanocephala has been examined in several countries where sugarcane is cultivated.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, understanding the genetic diversity of the pathogen in the main cultivation areas, together with processes that affect diversity, are required for de-veloping breeding strategies. Because of the inherent biological characteristics of rust spores and disease epidemics, many rust pathogens are recognized for their long-distance dispersal, following either a single aerial transport event or stepwise range expansion from a source into new regions (Isard et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity among Puccinia melanocephala isolates from Brazil assessed using simple sequence repeat markers

Peixoto-Junior¹,

Creste²,

Landell³

et al. 2014

Genet. Mol. Res.

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ABSTRACT. Brown rust (causal agent Puccinia melanocephala) is an important sugarcane disease that is responsible for large losses in yield worldwide. Despite its importance, little is known regarding the genetic diversity of this pathogen in the main Brazilian sugarcane cultivation areas. In this study, we characterized the genetic diversity of 34 P. melanocephala isolates from 4 Brazilian states using loci identified from an enriched simple sequence repeat (SSR) library. The aggressiveness of 3 isolates from major sugarcane cultivation areas was evaluated by inoculating an intermediately resistant and a susceptible cultivar. From the enriched library, 16 SSR-specific primers were developed, which produced scorable alleles. Of these, 4 loci were polymorphic and 12 were monomorphic for all isolates evaluated. The molecular Genetic diversity among Puccinia melanocephala isolates characterization of the 34 isolates of P. melanocephala conducted using 16 SSR loci revealed the existence of low genetic variability among the isolates. The average estimated genetic distance was 0.12. Phenetic analysis based on Nei's genetic distance clustered the isolates into 2 major groups. Groups I and II included 18 and 14 isolates, respectively, and both groups contained isolates from all 4 geographic regions studied. Two isolates did not cluster with these groups. It was not possible to obtain clusters according to location or state of origin. Analysis of disease severity data revealed that the isolates did not show significant differences in aggressiveness between regions.

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“…Finally, the primary mechanism that causes deposition of rust spores after longdistance aerial transport is rainfall (Isard et al 2011;Rowell and Romig 1966). Precipitation can efficiently wash spores from a tall column of air onto a host and concomitantly provide the pathogen with the environmental conditions (leaf wetness and cool to moderate temperatures) required to rapidly infect a plant host (Aylor 1986;Isard and Gage 2001;Rowell and Romig 1966).…”

Section: Epidemiologymentioning

confidence: 99%

From Select Agent to an Established Pathogen: The Response to Phakopsora pachyrhizi (Soybean Rust) in North America

et al. 2015

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The pathogen causing soybean rust, Phakopsora pachyrhizi, was first described in Japan in 1902. The disease was important in the Eastern Hemisphere for many decades before the fungus was reported in Hawaii in 1994, which was followed by reports from countries in Africa and South America. In 2004, P. pachyrhizi was confirmed in Louisiana, making it the first report in the continental United States. Based on yield losses from countries in Asia, Africa, and South America, it was clear that this pathogen could have a major economic impact on the yield of 30 million ha of soybean in the United States. The response by agencies within the United States Department of Agriculture, industry, soybean check-off boards, and universities was immediate and complex. The impacts of some of these activities are detailed in this review. The net result has been that the once dreaded disease, which caused substantial losses in other parts of the world, is now better understood and effectively managed in the United States. The disease continues to be monitored yearly for changes in spatial and temporal distribution so that soybean growers can continue to benefit by knowing where soybean rust is occurring during the growing season.

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Predicting Soybean Rust Incursions into the North American Continental Interior Using Crop Monitoring, Spore Trapping, and Aerobiological Modeling

Abstract: Isard, S.

Cited by 53 publications

References 21 publications

Chance, Variation and the Nature of Causality in Ecological Communities

Chance, Variation and the Nature of Causality in Ecological Communities

Genetic diversity among Puccinia melanocephala isolates from Brazil assessed using simple sequence repeat markers

From Select Agent to an Established Pathogen: The Response to Phakopsora pachyrhizi (Soybean Rust) in North America

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