Year: 2018
Type: article
Abstract: This study was carried out to study the effect of safe alternatives as compared to hydrogen cyanamide on breakingdormancy 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. Alltreatments except zinc sulphate in the second season had higher bud burst% than control. The results also showed thatcopper sulphate and hydrogen cyanamide applications significantly increased bud burst % than other treatments in bothseasons. In both seasons, hydrogen cyanamide gave higher yield and juice volume than the rest treatments, excepthydrogen peroxide for yield in the second season. Hydrogen cyanamide and zinc sulphate applications increased clusterweight in the second season only. Weight and size of 100 berries were significantly increased by copper and zinc sulphateand hydrogen cyanamide. In the first season, copper sulphate and hydrogen peroxide treatments increased berry lengthand diameter. On the other hand, the results showed that there were non significant differences among tested treatmentsconcerning berry length and diameter in the second season and L/D ratio in both seasons. In the first season, the highestpercentage of T.S.S was obtained by vines sprayed with garlic oil. In the second season, T.S.S% was not affected bydifferent applications. Data showed that zinc, copper sulphate and garlic oil significantly decreased acidity in the secondseason. The results in both seasons indicated that garlic oil, copper and zinc sulphate applications lead to increaseT.S.S/acid ratio. The data in both seasons indicated that anthocyanin content was increased by garlic oil treatment. In bothseasons, garlic oil and hydrogen cyanamide considerable increased shoot length. Hydrogen peroxide caused increase infruitfulness%, number of clusters and leaves in both seasons. Generally, there were non significant differences amongused treatments concerning peroxidase activity. Catalase activity was highly increased with bud burst which appeared asachromatic zone with high intensity in all treatments, except boric acid in the first season and copper, zinc sulphate andhydrogen cyanamide treatments in the second season.
Institutions: Agricultural Research Center, National Research Centre
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
Funder: Alexandria University
OpenAlex ID: W3017459403