Mahrous, H., EI-Fakhrani, E. (2002). EFFECT OF SOME DORMANCY BREAKING AGENTS ON PRODUCTIVITY, FRUIT QUALITY AND POWDERY MILDEW SEVERITY OF APRICOT. Journal of Plant Protection and Pathology, 27(11), 7811-7817. doi: 10.21608/jppp.2002.256040
H. A.H Mahrous; E. M.M. EI-Fakhrani. "EFFECT OF SOME DORMANCY BREAKING AGENTS ON PRODUCTIVITY, FRUIT QUALITY AND POWDERY MILDEW SEVERITY OF APRICOT". Journal of Plant Protection and Pathology, 27, 11, 2002, 7811-7817. doi: 10.21608/jppp.2002.256040
Mahrous, H., EI-Fakhrani, E. (2002). 'EFFECT OF SOME DORMANCY BREAKING AGENTS ON PRODUCTIVITY, FRUIT QUALITY AND POWDERY MILDEW SEVERITY OF APRICOT', Journal of Plant Protection and Pathology, 27(11), pp. 7811-7817. doi: 10.21608/jppp.2002.256040
Mahrous, H., EI-Fakhrani, E. EFFECT OF SOME DORMANCY BREAKING AGENTS ON PRODUCTIVITY, FRUIT QUALITY AND POWDERY MILDEW SEVERITY OF APRICOT. Journal of Plant Protection and Pathology, 2002; 27(11): 7811-7817. doi: 10.21608/jppp.2002.256040
EFFECT OF SOME DORMANCY BREAKING AGENTS ON PRODUCTIVITY, FRUIT QUALITY AND POWDERY MILDEW SEVERITY OF APRICOT
1Plant Pathology Research Institute, Agricultural Research Centre, Giza, Egypt
2Horticulture Research Institute, Agricultural Research Centre, Giza, Egypt.
Abstract
Mature apricot trees (N. 'Amal' were sprayed on 10 Ih of January using three different dormancy breaking agents i.e. zinc sulphate 5%, Dormex 1% (4go,{, Hydrogen Cyanamide) and Urea5%. Zinc sulphate showed superiority over all other treatments included as it was more effective in advancing bud burst by 17 and 12 days compared to the control in the first and second season, respectively. Moreover, it induced the highest bud opening percentage compared with the other two treatments or the control. In addition, zinc sulphate significantly increased fruit set and yield. Also zinc sulphate clearly increased fruit weight. diameter, firmness and T.S.S., meanwhile it decreased fruit acidity when compared with other treatments and control.Concerning the effect of tested chemicals of severity powdery mildew disease on apricot, results revealed that all the used materials decreased the disease severity percentage when compared with the untreated trees. Zinc sulphate was Ithe most effective in decreasing the infectlon with powdery mildew to 6.29 and 6.67% accompanied with a high yieldJ tree in the first and second season, respectively.
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