Interactive effects of altitude, microclimate and shading system on coffee leaf rust

Shade effects on coffee diseases are ambiguous because they vary depending on the season and environment. Using Coffee Leaf Rust (CLR) as an example, we demonstrate relationships between the environment and shading systems and their effects on disease intensity. We characterized seasonal variations...

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Veröffentlicht in:Journal of plant interactions 2019-01, Vol.14 (1), p.407-415
Hauptverfasser: Liebig, Theresa, Ribeyre, Fabienne, Läderach, Peter, Poehling, Hans-Michael, van Asten, Piet, Avelino, Jacques
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container_issue 1
container_start_page 407
container_title Journal of plant interactions
container_volume 14
creator Liebig, Theresa
Ribeyre, Fabienne
Läderach, Peter
Poehling, Hans-Michael
van Asten, Piet
Avelino, Jacques
description Shade effects on coffee diseases are ambiguous because they vary depending on the season and environment. Using Coffee Leaf Rust (CLR) as an example, we demonstrate relationships between the environment and shading systems and their effects on disease intensity. We characterized seasonal variations in microclimate and CLR incidence across different altitudes and shading systems, and integrated effects between the environment, shading systems, microclimate and CLR into a piecewise structural equation model. The diurnal temperature range was higher in unshaded systems, but differences decreased with altitude. Humidity related indicators in shaded systems decreased with altitude. At mid and high altitudes, high CLR incidence occurred in the shading system showing a low diurnal temperature range and a high dew point temperature. Our study demonstrates how microclimatic indicators vary as a function of the season, altitude and the coffee shading system, and how this in turn is related to CLR.
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subjects Altitude
Coffee
Dew point
Diurnal
Environmental effects
Hemileia vastatrix
Indicators
Leaf rust
Microclimate
Multivariate statistical analysis
piecewise structural equation modelling
Seasonal variations
shade
Shading
Structural equation modeling
Temperature
title Interactive effects of altitude, microclimate and shading system on coffee leaf rust
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