Unraveling the Complexity of Coffee Leaf Rust Behavior and Development in Different Coffea arabica Agroecosystems

Crop health management systems can be designed according to practices that help to reduce crop losses by restricting pathogen development and promoting host plant growth. A good understanding of pathogen and host dynamics, which are interde endent, is therefore needed. In this article, we used a holistic approach to explain the behavior of coffee leaf rust (CLR), a major coffee disease. We monitored coffee plant and CLR dynamics simultaneously in plots under different disease management and agroforestry systems. Diseased leaves were also collected to characterize inoculum stock and rust life stages (latent rust area, area with uredospores, necrosis due to rust) through picture analysis. We used structural equation modeling to obtain an overview of CLR pathosystem functioning on a plant scale. This overview integrates processes such as disease dilution by host leaf renewal, direct and indirect effects of fruit load on CLR development, antagonistic effects of shading depending on rust life stages, the tonic effect of copper-based fungicides on leaf retention, and effects on rust life stages depending on fungicide types.

Bibliographic Details

Main Authors:	354184 Murley, Isabelle autor/a, 354185 Pico, Jimmy autor/a, 354186 Granados, Eduardo autor/a, 354187 Boudrot, Audrey autor/a, 348392 Tixier, Philippe autor/a, 129521 Virginio Filho, Elias de Melo autor/a, 349013 Cilas, Christian autor/a, Avelino, Jacques autor/a 45076
Format:	Texto biblioteca
Language:	spa
Published:	Phytopathology 2020
Subjects:	COFFEA ARABICA, RUSTS, HEMILEIA VASTATRIX, LEAVES, PATHOGENIC FUNGI, EPIDEMIOLOGY, PHENOLOGY, PLANT DISEASE CONTROL, SHADE TOLERANCE, COPPER FUNGICIDES, AGROFORESTRY,
Online Access:	https://repositorio.catie.ac.cr/handle/11554/9467
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