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Carlos A. Pérez

Carlos A. Pérez
Facultad de Agronomía, Universidad de la República · Protección Vegetal

PhD

About

69
Publications
15,767
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1,052
Citations
Additional affiliations
April 1996 - January 2015
Facultad de Agronomía,
Position
  • Professor (Associate)

Publications

Publications (69)
Article
Teratosphaeria pseudoeucalypti is a fungal pathogen that causes a severe leaf blight disease on Eucalyptus trees. While presumed to be native to Australia, T. pseudoeucalypti has become well established and an important constraint to forestry in South America. The aim of this study was to use microsatellite markers to investigate the genetic divers...
Article
Earthworms have proved to contribute to plant health indirectly, by improvement of soil physical and chemical properties, as well as directly, through suppression of plant pathogens. Fusarium Head Blight, caused primarily by Fusarium graminearum, is one of the most important cereal diseases, with severe detrimental effects on yield and grain qualit...
Article
Full-text available
Draft genomes of the fungal species Ambrosiella cleistominuta, Cercospora brassicicola, C. citrullina, Physcia stellaris, and Teratosphaeria pseudoeucalypti are presented. Physcia stellaris is an important lichen forming fungus and Ambrosiella cleistominuta is an ambrosia beetle symbiont. Cercospora brassicicola and C. citrullina are agriculturally...
Article
Full-text available
This work aims to survey the current barley grain situation in terms of the concentration level of Fusarium mycotoxins and fungicides used to control Ramularia Leaf Spot and Fusarium Head Blight in barley grain. For this purpose, a total of 89 barley grain samples from different commercial pads in Uruguay were analyzed by liquid and gas chromatogra...
Chapter
Commercial forestry in Uruguay is mainly based on non-native Eucalyptus and Pinus plantations. Eucalyptus is the most planted genera and covers approximately 730,000 ha. Currently, forest products represent one of the top three exports of the country. Over the last two decades, the number of reported pests that threatens commercial plantations has...
Article
Full-text available
Agriculture has experienced a strong process of changes that have led to an increase in crop diseases caused by necrotrophic pathogens. Several studies demonstrated that by managing beneficial microorganisms, it is possible to reduce the impact of plant diseases. Based on this, the objective of this study was to determine the effect of field crops...
Article
Full-text available
Molecular techniques could aid earthworm species identification, especially when morphological characters are not taxonomically informative, or difficult to discern. No previous study has investigated molecular-based methods for earthworm taxonomy in Uruguay. The present study aimed to make a first approach using DNA barcoding as a tool to smoothen...
Article
In Australia, during the course of the last two decades, plantation area of Eucalyptus has expanded dramatically. One of the most important threats to these trees, and to the forest industries they sustain, is a complex of fungal diseases broadly treated as Teratosphaeria Leaf Blight. The aim of this review is to summarise some of the most importan...
Article
Full-text available
A pesar de vaivenes en la historia al respecto de cómo se ha interpretado la acción de las lombrices sobre el suelo y las plantas, actualmente se acepta como un hecho que estos anélidos tienen un efecto positivo indirecto sobre la productividad y sanidad vegetal, al mejorar las propiedades del suelo que sustenta la vida de las plantas. Lo que resul...
Article
Diseases remain a yield-limiting factor for crops despite the availability of control measures for many pathogens. Indigenous soil microorganisms can suppress some plant pathogens, yet there is little systematic information on the effects of cropping systems on disease-suppressive populations in soil. Streptomyces have been associated with suppress...
Article
Full-text available
Since the myrtle rust pathogen (Austropuccinia psidii) was first reported (as Puccinia psidii) in Brazil on guava (Psidium guajava) in 1884, it has been found infecting diverse myrtaceous species. Because A. psidii has recently spread rapidly worldwide with an extensive host range, genetic and genotypic diversities were evaluated within and among A...
Conference Paper
Full-text available
Ramularia leaf spot (RLS) caused by Ramularia collo-cygni (Rcc), has become one of the main constraints to barley production in Argentina and Uruguay. Grain yield losses as high as 70% have been reported in susceptible cultivars. The emergence of RLS as a major disease in the last six years has redirected coordinated research efforts to advance on...
Article
Wheat is one of the most important cultivated cereals worldwide. In Uruguay, the area increased from 153.000 ha to 453.000 ha between 2004 and 2012, nowadays representing 80% of the total winter crops area. As the high area of the crop, is common planting wheat in a field with wheat as previous winter crop (“wheat after wheat”). This practice leads...
Article
Full-text available
In recent years there has been a substantial increase in health problems on Eucalyptus spp. plantations elsewhere. Several diseases are currently affecting this crop, predominantly those caused by fungi. However, bacterial diseases have globally increased in importance. Eucalyptus plant pathogenic bacteria can cause: i) leaf spots, ii) shoot blight...
Article
Full-text available
Key message Multi-environment multi-QTL mixed models were used in a GWAS context to identify QTL for disease resistance. The use of mega-environments aided the interpretation of environment-specific and general QTL. Abstract Diseases represent a major constraint for barley (Hordeum vulgare L.) production in Latin America. Spot blotch (caused by...
Conference Paper
Full-text available
Los escarabajos de corteza (Coleoptera: Curculionidae: Scolytinae) ocasionan disturbios en los bosques naturales de coníferas del Hemisferio Norte. Se alimentan del floema fresco del hospedante, pueden tener varias generaciones al año y suelen actuar de forma concertada a través de feromonas. En el Hemisferio Sur, estos insectos se han instalado en...
Article
Full-text available
Eucalypt rust caused by Puccinia psidii Winter represents a major disease affecting eucalypt production in South America, and is threatening myrtaceous hosts worldwide. In Uruguay, it was first detected infecting Eucalyptus globulus in 2001 (4) and later on E. grandis, Myrrhinium atropurpureum, and Myrcianthes pungens, two myrtaceae hosts native to...
Data
Puccinia psidii isolate RustUY114-4 18S ribosomal RNA gene, partial sequence; internal transcribed spacer 1 and 5.8S ribosomal RNA gene, complete sequence; and internal transcribed spacer 2, partial sequence
Data
Puccinia psidii isolate RustUY114-2 18S ribosomal RNA gene, partial sequence; internal transcribed spacer 1 and 5.8S ribosomal RNA gene, complete sequence; and internal transcribed spacer 2, partial sequence
Data
Puccinia psidii isolate RustUY114-5 18S ribosomal RNA gene, partial sequence; internal transcribed spacer 1, 5.8S ribosomal RNA gene, and internal transcribed spacer 2, complete sequence; and 28S ribosomal RNA gene, partial sequence
Conference Paper
Multi-environment multi-QTL mixed models were used in a GWAS context to identify QTL for disease resistance. The use of mega-environments aided the interpretation of environment-specific and general QTL. Diseases represent a major constraint for barley (Hordeum vulgare L.) production in Latin America. Spot blotch (caused by Cochliobolus sativus), s...
Article
Full-text available
Novel species of microfungi described in the present study include the following from South Africa: Cercosporella dolichandrae from Dolichandra unguiscati, Seiridium podocarpi from Podocarpus latifolius, Pseudocercospora parapseudarthriae from Pseudarthria hookeri, Neodevriesia coryneliae from Corynelia uberata on leaves of Afrocarpus falcatus, Ram...
Article
Full-text available
Barley spot blotch (SB), caused by Cochliobolus sativus, is an important barley disease which causes extensive grain yield losses. These losses may not always correlate directly with the amount of diseased leaf area. Two barley cultivars, Quebracho (susceptible to SB) and Carumbé (with intermediate susceptibility to SB), were compared in field expe...
Article
Full-text available
Novel species of microfungi described in the present study include the following from South Africa: Camarosporium aloes, Phaeococcomyces aloes and Phoma aloes from Aloe, C. psoraleae, Diaporthe psoraleae and D. psoraleae-pinnatae from Psoralea, Colletotrichum euphorbiae from Euphorbia, Coniothyrium prosopidis and Peyronellaea prosopidis from Prosop...
Chapter
Full-text available
Forage legumes are essential for an efficient animal-based agriculture. This chapter describes microbial-based strategies for improving legume establishment. It focuses on the use of root nodule bacteria for growth promotion and rhizosphere pseudomonads for disease management. The technological system for biological nitrogen fixation deployed in Ur...
Article
Full-text available
Mycosphaerella species are well-known causal agents of leaf diseases on many economically and ecologically important plant species. In Uruguay, a relatively large number of Mycosphaerellaceae and Teratosphaeriaceae are found on Eucalyptus, but nothing is known of these fungi on native Myrtaceae. The aim of this study was to identify Mycosphaerellac...
Conference Paper
Diseases represent the main constraints for barley (Hordeum vulgare L.) production in Latin America. Spot blotch (caused by Cochliobolus sativus), stripe rust (caused by Puccinia striiformis f.sp. hordei) and leaf rust (caused by Puccinia hordei) are three of the most important diseases that affect the crop in the region. Chemical control of those...
Chapter
Full-text available
Diseases are the main problem for barley in Latin America. Spot blotch (caused by Cochliobolus sativus), stripe rust (caused by Puccinia striiformis f. sp. hordei), and leaf rust (caused by Puccinia hordei) are three of the most important diseases that attack the crop in the region. Chemical control of those diseases is both economically and enviro...
Article
Full-text available
Novel species of microfungi described in the present study include the following from South Africa: Camarosporium aloes, Phaeococcomyces aloes and Phoma aloes from Aloe, C. psoraleae, Diaporthe psoraleae and D. psoraleae-pinnatae from Psoralea, Colletotrichum euphorbiae from Euphorbia, Coniothyrium prosopidis and Peyronellaea prosopidis from Prosop...
Article
With 2 figures and 6 tables We studied the genetics of the resistance to leaf rust (LR) (caused by Puccinia hordei) and spot blotch (SB) (caused by Cochliobolus sativus) in barley using a doubled-haploid population derived from the cross BCD47 × Baronesse. BCD47 has low SB severity and high susceptibility to LR, while Baronesse is susceptible to SB...
Article
Full-text available
A serious disease of green, actively expanding stems of young Eucalyptus grandis, E. dunnii, E. globulus and E. globulus subsp. maidenii has been observed in plantations in Uruguay and Argentina during the course of the past 10years. The symptoms of the disease are unlike those previously observed on any species of Eucalyptus. In this study, we des...
Article
Full-text available
Eucalyptus or guava rust caused by Puccinia psidii is a serious disease of Eucalyptus and other Myrtaceae. In Uruguay, it has been previously found on Eucalyptus globulus and Psidium brasiliensis. Almost nothing is known regarding the occurrence of this pathogen on other Eucalyptus species or native Myrtaceae in that country. In this study, we dete...
Article
Full-text available
Species of the Botryosphaeriaceae are important pathogens causing cankers and die-back on many woody plants. In Uruguay, Neofusicoccum eucalyptorum, N. ribis and B. dothidea have previously been associated with stem cankers on plantation-grown Eucalyptus globulus. However, very little is known regarding the occurrence and species diversity of Botry...
Article
Mycosphaerella leaf diseases represent one of the most important impediments to Eucalyptus plantation forestry. Yet they have been afforded little attention in Uruguay where these trees are an important resource for a growing pulp industry. The objective of this study was to identify species of Mycosphaerellaceae and Teratosphaeriaceae resulting fr...
Poster
Full-text available
Los problemas sanitarios son una amenaza para las más de 500 mil Ha de Eucalyptus plantadas en Uruguay, sin embargo la dinámica espacial de las plagas y enfermedades y su relación con factores ambientales y genéticos no ha sido debidamente estudiada. Los objetivos del presente trabajo fueron: i) identificar patrones de distribución de las principal...
Article
Full-text available
Alfalfa (Medicago sativa) is one of the most important crops used in Uruguay for livestock feeding. Seedling diseases, particularly damping-off, are a critical factor which limits its establishment. Three native Pseudomonas fluorescens strains, UP61.2, UP143.8 and UP148.2, previously isolated from Lotus corniculatus, were evaluated to determine the...
Article
Full-text available
Mycosphaerella leaf disease on Eucalyptus is well known in Uruguay but none of the more serious Mycosphaerella spp. and Teratosphaeria spp. causing this disease have yet been found. In the autumn of 2007, more severe defoliation than has been known in the past and associated with symptoms resembling Mycosphaerella infections was observed on Eucalyp...
Article
Neofusicoccum eucalyptorum is a canker-associated fungus apparently highly specialized on Eucalyptus. However, in surveys of the microbial population inhabiting native Myrtaceae in Uruguay, fungal cultures resembling N. eucalyptorum were isolated. The possible occurrence of N. eucalyptorum on hosts other than Eucalyptus prompted further investigati...
Article
Full-text available
Quambalaria eucalypti, a serious pathogen of Eucalyptus, is believed to be native to Australia and introduced into various southern hemisphere countries, including Uruguay. In this study we record the discovery of Q. eucalypti causing leaf lesions on Myrceugenia glaucescens, a tree native to Uruguay. The identity of the pathogen was confirmed using...
Article
Full-text available
Species of the Botryosphaeriaceae are important pathogens causing cankers and die-back on many woody plants. In Uruguay, Neofusicoccum eucalyptorum (=Botryosphaeria eucalyptorum), N. ribis (=B. ribis) and B. dothidea have previously been associated with stem cankers on plantation grown Eucalyptus globulus. These fungi also exist as endophytes in he...
Article
Full-text available
Fusarium head blight (FHB), incited by Fusarium graminearum Schwabe is one of the most devastating diseases of wheat. Primary inoculum generated on crop residue is the driving force of FHB epidemics. Fusarium survival on crop residues is affected by soil microbial antagonists. The incorporation of green manures has been shown to increase the densit...
Article
Full-text available
In Uruguay, forage legumes play an important role in farming production. Important losses in their establish-ment are caused by damping-off disease. Research conducted in the Laboratory of Microbial Ecology of the IIBCE, has led to the selection of native fluorescent Pseudomonas strains that control plant pathogens of the genera Pythium and Rhizoct...
Conference Paper
Diseases are the main problem for barley in Latin America. Spot blotch (caused by Cochliobolus sativus), stripe rust (caused by Puccinia striiformis f.sp. hordei) and leaf rust (caused by Puccinia hordei) are three of the most important diseases that attack the crop in the region. Chemical control of those diseases is both economically and environm...

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