Effect of defoliation intensity and timing on the growth of Populus alba and Salix babylonica x Salix alba

Insect defoliations have detrimental impacts on timber production in commercial tree plantations. The effect of intensity and timing of defoliation on the growth of two commercial salicaceae was assessed at plantations located in the Delta of the Paraná River, Argentina. Experimental trees were rand...

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Autores principales:	Rubio,Alejandra, Loetti,Verónica, Bellocq,Isabel
Lenguaje:	English
Publicado:	Universidad Austral de Chile, Facultad de Ciencias Forestales 2013
Materias:	Salicaceae manual defoliation tree growth Delta of the Paraná River Argentina
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002013000300011
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spelling	oai:scielo:S0717-920020130003000112014-01-14Effect of defoliation intensity and timing on the growth of Populus alba and Salix babylonica x Salix albaRubio,AlejandraLoetti,VerónicaBellocq,Isabel Salicaceae manual defoliation tree growth Delta of the Paraná River Argentina Insect defoliations have detrimental impacts on timber production in commercial tree plantations. The effect of intensity and timing of defoliation on the growth of two commercial salicaceae was assessed at plantations located in the Delta of the Paraná River, Argentina. Experimental trees were randomly selected from two 1-year-old plantations of the most common clones planted in forestry production, Populus alba 'Villafranca' ("I-58/57") and Salix babylonica x Salix alba ("A-250/33"). We used a pre-post design to evaluate the effect of five intensities of manual defoliation (i.e. 100 %, 75 %, 50 %, 25 %, and 0 % as control) applied in four different times during the growing season (i.e. October, November, December and January) on tree height and diameter at breast height (DBH). Results indicated that manual defoliation negatively affected the growth of the studied poplar and willow clones in both height and diameter, and that the magnitude of the effect depended on the intensity and timing of defoliation. Willows were only affected by defoliation conducted during the spring (October and November); complete defoliation caused the highest reduction in growth (46 % reduction in height and 62 % in DBH compared to the control). Manual defoliation of poplars had a significant effect on growth at any time during the spring-summer; trees subjected to 100 % defoliation showed the highest growth reductions (up to 76 % in height and 88 % in DBH compared to control). This study indicated that commercial poplars were less tolerant to defoliation than willows.info:eu-repo/semantics/openAccessUniversidad Austral de Chile, Facultad de Ciencias ForestalesBosque (Valdivia) v.34 n.3 20132013-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002013000300011en10.4067/S0717-92002013000300011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Salicaceae manual defoliation tree growth Delta of the Paraná River Argentina
spellingShingle	Salicaceae manual defoliation tree growth Delta of the Paraná River Argentina Rubio,Alejandra Loetti,Verónica Bellocq,Isabel Effect of defoliation intensity and timing on the growth of Populus alba and Salix babylonica x Salix alba
description	Insect defoliations have detrimental impacts on timber production in commercial tree plantations. The effect of intensity and timing of defoliation on the growth of two commercial salicaceae was assessed at plantations located in the Delta of the Paraná River, Argentina. Experimental trees were randomly selected from two 1-year-old plantations of the most common clones planted in forestry production, Populus alba 'Villafranca' ("I-58/57") and Salix babylonica x Salix alba ("A-250/33"). We used a pre-post design to evaluate the effect of five intensities of manual defoliation (i.e. 100 %, 75 %, 50 %, 25 %, and 0 % as control) applied in four different times during the growing season (i.e. October, November, December and January) on tree height and diameter at breast height (DBH). Results indicated that manual defoliation negatively affected the growth of the studied poplar and willow clones in both height and diameter, and that the magnitude of the effect depended on the intensity and timing of defoliation. Willows were only affected by defoliation conducted during the spring (October and November); complete defoliation caused the highest reduction in growth (46 % reduction in height and 62 % in DBH compared to the control). Manual defoliation of poplars had a significant effect on growth at any time during the spring-summer; trees subjected to 100 % defoliation showed the highest growth reductions (up to 76 % in height and 88 % in DBH compared to control). This study indicated that commercial poplars were less tolerant to defoliation than willows.
author	Rubio,Alejandra Loetti,Verónica Bellocq,Isabel
author_facet	Rubio,Alejandra Loetti,Verónica Bellocq,Isabel
author_sort	Rubio,Alejandra
title	Effect of defoliation intensity and timing on the growth of Populus alba and Salix babylonica x Salix alba
title_short	Effect of defoliation intensity and timing on the growth of Populus alba and Salix babylonica x Salix alba
title_full	Effect of defoliation intensity and timing on the growth of Populus alba and Salix babylonica x Salix alba
title_fullStr	Effect of defoliation intensity and timing on the growth of Populus alba and Salix babylonica x Salix alba
title_full_unstemmed	Effect of defoliation intensity and timing on the growth of Populus alba and Salix babylonica x Salix alba
title_sort	effect of defoliation intensity and timing on the growth of populus alba and salix babylonica x salix alba
publisher	Universidad Austral de Chile, Facultad de Ciencias Forestales
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002013000300011
work_keys_str_mv	AT rubioalejandra effectofdefoliationintensityandtimingonthegrowthofpopulusalbaandsalixbabylonicaxsalixalba AT loettiveronica effectofdefoliationintensityandtimingonthegrowthofpopulusalbaandsalixbabylonicaxsalixalba AT bellocqisabel effectofdefoliationintensityandtimingonthegrowthofpopulusalbaandsalixbabylonicaxsalixalba
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Effect of defoliation intensity and timing on the growth of Populus alba and Salix babylonica x Salix alba

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