Finding Safe and Cheap Exchanges to Hydrogen Cyanamide on “Flame Seedless” grapevines | ||||
| Alexandria Journal of Agricultural Sciences | ||||
| Article 6, Volume 63, Issue 3, June 2018, Page 171-181 PDF (746 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/alexja.2018.81837 | ||||
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| Authors | ||||
| E. A. El-Sayed Mohamed1; A. Mahfouze Sherin2 | ||||
| 1Viticulture Department, Horticulture Research Institute, Agricultural Research Center, Giza, Egypt. | ||||
| 2National Research Centre, Genetic Engineering and Biotechnology Research Division, Genetics and Cytology Department, Dokki, 12622, Egypt. | ||||
| Abstract | ||||
| This study was carried out to study the effect of safe alternatives as compared to hydrogen cyanamide on breaking dormancy of" Flame seedless" grapevines. The vines were subjected the following spray treatments; control, garlic oil, hydrogen peroxide, copper sulphate, zinc sulphate, boric acid and hydrogen cyanamide in the second week of January. All treatments except zinc sulphate in the second season had higher bud burst% than control. The results also showed that copper sulphate and hydrogen cyanamide applications significantly increased bud burst % than other treatments in both seasons. In both seasons, hydrogen cyanamide gave higher yield and juice volume than the rest treatments, except hydrogen peroxide for yield in the second season. Hydrogen cyanamide and zinc sulphate applications increased cluster weight in the second season only. Weight and size of 100 berries were significantly increased by copper and zinc sulphate and hydrogen cyanamide. In the first season, copper sulphate and hydrogen peroxide treatments increased berry length and diameter. On the other hand, the results showed that there were non significant differences among tested treatments concerning berry length and diameter in the second season and L/D ratio in both seasons. In the first season, the highest percentage of T.S.S was obtained by vines sprayed with garlic oil. In the second season, T.S.S% was not affected by different applications. Data showed that zinc, copper sulphate and garlic oil significantly decreased acidity in the second season. The results in both seasons indicated that garlic oil, copper and zinc sulphate applications lead to increase T.S.S/acid ratio. The data in both seasons indicated that anthocyanin content was increased by garlic oil treatment. In both seasons, garlic oil and hydrogen cyanamide considerable increased shoot length. Hydrogen peroxide caused increase in fruitfulness%, number of clusters and leaves in both seasons. Generally, there were non significant differences among used treatments concerning peroxidase activity. Catalase activity was highly increased with bud burst which appeared as achromatic zone with high intensity in all treatments, except boric acid in the first season and copper, zinc sulphate and hydrogen cyanamide treatments in the second season. | ||||
| Keywords | ||||
| Grape; Hydrogen cyanamide; Copper sulphate; Garlic oil; Peroxidase; Catalase | ||||
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