Shade tree Chloroleucon eurycyclum promotes coffee leaf rust by reducing uredospore wash-off by rain
addition, may interact with environment. To better understand shade trees effects on coffee leaf rust (CLR), we studied three disease stages separately: sporulation, uredospore wash-off by rain, and uredospore deposition on leaves. The study was conducted during almost one year in the long-term tr...
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Elsevier, Ámsterdam (Países Bajos)
2020
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| Acceso en línea: | https://repositorio.catie.ac.cr/handle/11554/9304 https://doi.org/10.1016/j.cropro.2019.105038 |
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RepoCATIE93042023-11-16T16:35:55Z Shade tree Chloroleucon eurycyclum promotes coffee leaf rust by reducing uredospore wash-off by rain Avelino, Jacques Vilchez, Sergio Segura-Escobar, M.B. Brenes-Loaiza, M.A. Virginio Filho, Elias de Melo Casanoves, Fernando COFFEA ARABICA HEMILEIA VASTATRIX CHLOROLEUCON EURYCYCLUM UREDOSPORAS CAÍDA DE LAS HOJAS SOMBRA ENERGÍA CINÉTICA ÁRBOLES DE SOMBRA ESPORULACIÓN CATIE TURRIALBA COSTA RICA addition, may interact with environment. To better understand shade trees effects on coffee leaf rust (CLR), we studied three disease stages separately: sporulation, uredospore wash-off by rain, and uredospore deposition on leaves. The study was conducted during almost one year in the long-term trial on coffee-based agroforestry systems established by CATIE in 2000, in Turrialba, a low altitude area of Costa Rica. We only used the Full Sun and Shade provided by Chloroleucon eurycyclum treatments. For studying sporulation, we harvested diseased leaves every three weeks and collected the uredospores present on the lesions. For assessments of uredospore wash-off, we located containers at ground level below the coffee bushes and in the interval between rows of coffee bushes, and removed them after rainfall events (43 rainfall events studied) to count the number of uredospores collected. For uredospore deposition, we used varnish to capture deposited uredospores on apparently healthy coffee bush leaves (55 dates). We also studied the raindrop kinetic energy by using splashcups, on 19 rainy days. The number of uredospores produced and preserved was 2.22 times higher below shade trees than in full sun, whereas the number of uredospores lost by wash-off, below the coffee bush, was 1.62 times lower. Reduced wash-off was probably due to raindrop interception by shade trees and stemflow and to the increased kinetic energy of the raindrops in the understory of the Shade treatment (twice as high as that measured in full sun), which reduced the capacity of coffee leaves to intercept raindrops. In addition, we found 1.43 times more uredospores deposited on apparently healthy leaves below shade trees than in full sun, partly due to the higher number of uredospores produced and preserved below shade trees. Increasing throughfall and reducing raindrop kinetic energy below shade trees seem crucial to improved CLR regulation. This can be achieved by selecting specific shade tree functional traits and by implementing shade pruning during the rainy season. 2020-01-10T15:03:37Z 2020-01-10T15:03:37Z 2020 Artículo https://repositorio.catie.ac.cr/handle/11554/9304 https://doi.org/10.1016/j.cropro.2019.105038 en Crop Protection info:eu-repo/semantics/restrictedAccess application/pdf Elsevier, Ámsterdam (Países Bajos) |
| institution |
Centro Agronómico Tropical de Investigación y Enseñanza |
| collection |
Repositorio CATIE |
| language |
Inglés |
| topic |
COFFEA ARABICA HEMILEIA VASTATRIX CHLOROLEUCON EURYCYCLUM UREDOSPORAS CAÍDA DE LAS HOJAS SOMBRA ENERGÍA CINÉTICA ÁRBOLES DE SOMBRA ESPORULACIÓN CATIE TURRIALBA COSTA RICA |
| spellingShingle |
COFFEA ARABICA HEMILEIA VASTATRIX CHLOROLEUCON EURYCYCLUM UREDOSPORAS CAÍDA DE LAS HOJAS SOMBRA ENERGÍA CINÉTICA ÁRBOLES DE SOMBRA ESPORULACIÓN CATIE TURRIALBA COSTA RICA Avelino, Jacques Vilchez, Sergio Segura-Escobar, M.B. Brenes-Loaiza, M.A. Virginio Filho, Elias de Melo Casanoves, Fernando Shade tree Chloroleucon eurycyclum promotes coffee leaf rust by reducing uredospore wash-off by rain |
| description |
addition, may interact with environment. To better understand shade trees effects on coffee leaf rust (CLR), we
studied three disease stages separately: sporulation, uredospore wash-off by rain, and uredospore deposition on
leaves. The study was conducted during almost one year in the long-term trial on coffee-based agroforestry
systems established by CATIE in 2000, in Turrialba, a low altitude area of Costa Rica. We only used the Full Sun
and Shade provided by Chloroleucon eurycyclum treatments. For studying sporulation, we harvested diseased
leaves every three weeks and collected the uredospores present on the lesions. For assessments of uredospore
wash-off, we located containers at ground level below the coffee bushes and in the interval between rows of
coffee bushes, and removed them after rainfall events (43 rainfall events studied) to count the number of uredospores
collected. For uredospore deposition, we used varnish to capture deposited uredospores on apparently
healthy coffee bush leaves (55 dates). We also studied the raindrop kinetic energy by using splashcups, on 19
rainy days. The number of uredospores produced and preserved was 2.22 times higher below shade trees than in
full sun, whereas the number of uredospores lost by wash-off, below the coffee bush, was 1.62 times lower.
Reduced wash-off was probably due to raindrop interception by shade trees and stemflow and to the increased
kinetic energy of the raindrops in the understory of the Shade treatment (twice as high as that measured in full
sun), which reduced the capacity of coffee leaves to intercept raindrops. In addition, we found 1.43 times more
uredospores deposited on apparently healthy leaves below shade trees than in full sun, partly due to the higher
number of uredospores produced and preserved below shade trees. Increasing throughfall and reducing raindrop
kinetic energy below shade trees seem crucial to improved CLR regulation. This can be achieved by selecting
specific shade tree functional traits and by implementing shade pruning during the rainy season. |
| format |
Artículo |
| author |
Avelino, Jacques Vilchez, Sergio Segura-Escobar, M.B. Brenes-Loaiza, M.A. Virginio Filho, Elias de Melo Casanoves, Fernando |
| author_facet |
Avelino, Jacques Vilchez, Sergio Segura-Escobar, M.B. Brenes-Loaiza, M.A. Virginio Filho, Elias de Melo Casanoves, Fernando |
| author_sort |
Avelino, Jacques |
| title |
Shade tree Chloroleucon eurycyclum promotes coffee leaf rust by reducing uredospore wash-off by rain |
| title_short |
Shade tree Chloroleucon eurycyclum promotes coffee leaf rust by reducing uredospore wash-off by rain |
| title_full |
Shade tree Chloroleucon eurycyclum promotes coffee leaf rust by reducing uredospore wash-off by rain |
| title_fullStr |
Shade tree Chloroleucon eurycyclum promotes coffee leaf rust by reducing uredospore wash-off by rain |
| title_full_unstemmed |
Shade tree Chloroleucon eurycyclum promotes coffee leaf rust by reducing uredospore wash-off by rain |
| title_sort |
shade tree chloroleucon eurycyclum promotes coffee leaf rust by reducing uredospore wash-off by rain |
| publisher |
Elsevier, Ámsterdam (Países Bajos) |
| publishDate |
2020 |
| url |
https://repositorio.catie.ac.cr/handle/11554/9304 https://doi.org/10.1016/j.cropro.2019.105038 |
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