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Fathi,, M., Hussein, S. (2007). BETTER COMBINATION OF DEFOLIATION AND DORMANCY BREAKING AGENT FOR PEAR ORCHARDS. Journal of Plant Production, 32(9), 7575-7587. doi: 10.21608/jpp.2007.220647
M. A. Fathi,; S. M. Hussein. "BETTER COMBINATION OF DEFOLIATION AND DORMANCY BREAKING AGENT FOR PEAR ORCHARDS". Journal of Plant Production, 32, 9, 2007, 7575-7587. doi: 10.21608/jpp.2007.220647
Fathi,, M., Hussein, S. (2007). 'BETTER COMBINATION OF DEFOLIATION AND DORMANCY BREAKING AGENT FOR PEAR ORCHARDS', Journal of Plant Production, 32(9), pp. 7575-7587. doi: 10.21608/jpp.2007.220647
Fathi,, M., Hussein, S. BETTER COMBINATION OF DEFOLIATION AND DORMANCY BREAKING AGENT FOR PEAR ORCHARDS. Journal of Plant Production, 2007; 32(9): 7575-7587. doi: 10.21608/jpp.2007.220647

BETTER COMBINATION OF DEFOLIATION AND DORMANCY BREAKING AGENT FOR PEAR ORCHARDS

Article 21, Volume 32, Issue 9, September 2007, Page 7575-7587  XML PDF (555.9 K)
Document Type: Original Article
DOI: 10.21608/jpp.2007.220647
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Authors
M. A. Fathi,; S. M. Hussein
Hort. Res. stit., Agric. Res. Center, Giza, Egypt
Abstract
This study was conducted during the 2004-2005 and 2005-2006 seasons to evaluate the effect of spraying “Le-Conte” pear (budded on Pyrus communis rootstock) trees with defoliation treatments (urea, 7% or zinc sulfate, 3.5%) at 1st Nov. or 15th Nov. and dormancy-breaking agents (hydrogen cyanamide, 49%; potassium sulfate or ammonium nitrate) sprayed at 1st Jan., 15th Jan. or 1st Feb. Measurements included vegetative growth (shoot length, number of leaves per shoot and percentage of vegetative spurs), floral growth (percentage of floral spurs and fruit set), fruit yield and its components (number of fruits/tree, fruit yield/tree and yield monetary value/tree) and fruit quality attributes (fruit weight and size as well as juice TSS and acidity).
Statistical analysis confirmed that, better results can be obtained as the follows combination of treatments. At 15th Nov. leaf shedding should spray using ZnSO4 (3.5%). At the next 15th Jan., hydrogen cyanamide (49%) should spray on “Le-Conte” pear trees.
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