Articles
EFFECTS OF GIBBERELLIC ACID ON ‘MONTMORENCY’ SOUR CHERRY PRODUCTION AS INFLUENCED BY CLONAL ROOTSTOCKS
Article number
468_44
Pages
363 – 366
Language
Abstract
A planting of ‘Montmorency’ sour cherries (Prunus cerasus L.) on 20 different rootstocks was established in Utah in 1987 as a cooperating study for the NC-140 regional research project investigating the effects of rootstocks on pome and stone fruits.
The highest yield efficiency (kg fruit/trunk cross-sectional area) for all rootstocks occurred in 1992. Due to the precocious nature of some rootstocks, two- and three-year-old tissue was commonly devoid of fruiting spurs by the seventh growing season.
Symptoms were similar to the spurless tissue induced by sour cherry yellows virus complex.
Budwood was indexed for virus disease in 1994. Trees on Gi 173/9, Gi 195/1 and Gi 195/2 rootstocks testing positive for virus have since died.
Spurless limbs were not necessarily correlated with virus infection.
Beginning in 1994, annual applications of gibberellic acid were applied to some replications of the planting. 1994 GA treatments stimulated vegetative growth and reduced production in 1995. In 1996, yields from treated trees were as high or higher than those from untreated trees on the same rootstock and were considerably higher on rootstock combinations commonly exhibiting spurless wood.
The highest yield efficiency (kg fruit/trunk cross-sectional area) for all rootstocks occurred in 1992. Due to the precocious nature of some rootstocks, two- and three-year-old tissue was commonly devoid of fruiting spurs by the seventh growing season.
Symptoms were similar to the spurless tissue induced by sour cherry yellows virus complex.
Budwood was indexed for virus disease in 1994. Trees on Gi 173/9, Gi 195/1 and Gi 195/2 rootstocks testing positive for virus have since died.
Spurless limbs were not necessarily correlated with virus infection.
Beginning in 1994, annual applications of gibberellic acid were applied to some replications of the planting. 1994 GA treatments stimulated vegetative growth and reduced production in 1995. In 1996, yields from treated trees were as high or higher than those from untreated trees on the same rootstock and were considerably higher on rootstock combinations commonly exhibiting spurless wood.
Publication
Authors
J.L. Anderson, T.E. Lindstrom
Keywords
Prunus cerasus, rootstocks, gibberellic acid, virus
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