EFFECT OF SOME GIBBERELLIC ACID AND FORCHLOROFENURON APPLICATION ON PRODUCTIVITY AND BERRIES DEVELOPMENT OF (EARLY SWEET) GRAPES | ||
| Menoufia Journal of Plant Production | ||
| Article 2, Volume 6, Issue 7, July 2021, Pages 387-388 PDF (164.74 K) | ||
| Document Type: original papers | ||
| DOI: 10.21608/mjppf.2021.188220 | ||
| Authors | ||
| S. A. Ahmed1; A. E. Hassan2 | ||
| 1Prof. of Pomology, Fac. of Agric., Menoufia Univ. | ||
| 2Associate Prof. of Pomology, Fac. of Agric., Menoufia Univ. | ||
| Abstract | ||
| Effect of some gibberellic acid and forchlorfenuron Application on productivity and berries development of {early sweet} grapes. - This study was conducted during the two successive seasons of (2016 and 2017), on -5- years-old grapevines, of the seedless grape cultivar early sweet (vitis vinifera.L). - The vines are grown in aprivate vineyardat sadat city, Menoufia governorate, Egypt. - The vines were spaced (2*3 M) apart. - The vines were growen in sandy soil and supported with aspanish parron system. Early sweet One of the most important table grape varieties, It is earliest white seedless table grapes, And successfully grown under Egypt conditions, And it has good eating But; Natural berry size of early sweet in not large enough for Export and profitable trading, so, farmers must be use growth regulators Gibberellic acid GA3and forchlofenuron CPPU and other synthetic growth stimulants to:- increase size Berry grapes without any health or environment hazards which, can be the most advantageous in marketing and export table grapes and this is the Aim of this study. - The selected vines received the recommended horticultural practices. This experiment included 2 stages:- 1- Dipping clusters with CPPU concentration (1 to 7) PPM after fruit set directly. 2- And spray clusters with GA3 concentration (20) PPM when diameter berry (6 to 8) mm. The results led to: increase berry {size, weight, firmness}, increase cluster {size, weight}, increase total yield, decrease total soluble solids {degrees brix}and increase titratable acidity. The sixth treatment Gave the highest production with the best possible quality and without delaying the harvest time. So, the sixth treatment = (GA3 20 PPM + CPPU 5 PPM) THE BEST TREATMENT IN (YIELD AND QUALITY) early sweet table grapes cultivar. Treatments (1 & 2 & 3 & 4 & 5) However, those gave increasing TSS more than sixth treatment, but those gave berry (size, weight, firmness) lesser than sixth treatment consequent reducing the yield, which is undesirable. treatment (7 & 8) However, those gave increasing berry ( size , weight , firmness) more than sixth treatment but, those gave TSS lesser than 14% refract meter consequent :- (delay the harvest – decreasing the quality, which is undesirable also. from the foregoing results :- It could be concluded that sixth treatment = (CPPU 5 PPM – GA3 20 PPM) the most advantageous in (yield-quality) on early sweet table grapes cultivar under the same conditions this experiment. | ||
| Keywords | ||
| Grapes; Early Sweet; gibberellic acid; forchlorfnuron; cluster; productivity; berries quality; attributes | ||
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