Dinámica de la roya en el cultivo de Dactylis glomerata en zonas altoandinas: Dynamics of rust in Dactylis glomerata crops in the high Andean regions

Dinámica de la roya en el cultivo de Dactylis glomerata en zonas altoandinas

Abstract

Leaf rust caused by Puccinia coronata is one of the main diseases affecting the productivity of Dactylis glomerata in high Andean pastoral areas, especially during winter, when climatic conditions favour the reactivation of the pathogen from overwintering teliospores. The aim was to systematise information on rust (Puccinia coronata) on Dactylis glomerata, highlighting its incidence in high Andean areas. Bibliographic references published between 2019 and 2025 were reviewed and selected, such as scientific articles registered in the SciELO and Scopus databases and theses downloaded from university repositories, under certain inclusion and exclusion criteria, analysing these investigations from a heuristic and hermeneutic perspective of the state of the art. Among the results, relative humidity greater than 85 % and exposure time were the main predictors of severity, reaching an adjusted R² of 0.79. Principal component analysis and canonical correlation analysis showed significant associations between environmental and epidemiological variables. Among the conclusions, it is highlighted that a winter climate favours optimal conditions for rust, which requires monitoring strategies.