Faddi Abbas(1) Mahmoud Sido(1) and Entessar Al-Jbawi*(2) and Mohammad Ali Ali(2)
Received: 11/06/2016 Accepted: 12/08/2016
Sugar beet bolting is considered one of the main obstacles of sugar beet growing in the middle area of Syria, because of low temperatures during autumn sowing. This phenomenon caused big economic losses neither for the factories and the farmers, because of high reduction in sugar content. Regarding the importance of the issue an experiment was conducted in Homs Agricultural Research Center during 2013/2014 season, to study the effect of cutting bolters to limit its negative effect on the morphological and quality traits of four sugar beet varieties, tow are monogerm varieties i.e. Inverstar and Parade, while the other are multigerm varieties i.e. DS9008 and Byblos. Split plot design was used, where the dated of cutting bolters allocated in the maim plots, while the varieties were randomly distributed in the sub plot, with three replicates. The results exhibited a high bolting percentage (P<0.05) in the variety DS9008 (67%), which is considered the most sensitive varieties to bolting, while bolting was 0% for the variety Parade, which can be defined as the most resistant variety to bolting. The percentage of early bolting, which is classified as the most dangerous type of bolting, achieved the highest value (45%) in the variety DS9008, then Parade (30.2%), followed by Inverstar (2.4%), and finally Byblos (0%). Early bolters cut led to an increase in root weight in an average of 10.7%, while the increment in root weight was 1% for the medium bolters cut. In terms of brix%, early bolters cut led to an increase in brix in an average of 16.9%, while the increment in brix was 5.5% for the medium bolters cut.
Keywords: Sugar beet varieties, Bolting percentage, Bloters cut.