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Two-years field trial (2017/18 and 2018/19) was conducted at the Experimental Farm, National Research Centre El-Behaira Governorate, Egypt to compare different herbicidal combinations with different doses on sugar beet yield traits and associated weeds. Sixteen weed control treatment combinations were applied to test their efficiency on sugar beet yield and quality. To form these combinations two broadleaves herbicides (Tigro and Betasana-Trio) were combined with a narrow weed herbicide (Select super) or with the hand weeding treatment. The results showed that Betasana-Trio combination at the lower dose of application 0.675 l fed-1(fed-1 = feddan = 4200 m2) combined with Select Super at 0.375 l fed-1 with or without hand weeding as well as Betasana-Trio at 0.9 l fed-1 combined with hand weeding or Select Super at 0.5 l fed-1 caused high eradication percentages of the total fresh and dry weight of weeds as well as total number of weeds m-2 (>90%). The highest sugar beet yield resulted from the combination of Betasana-Trio 0.675 l fed-1 + Select Super 0.375 l fed-1, which gave the greatest sugar yield fed-1. Although the combination Betasana-Trio at 0.9 l fed-1 + Select Super at 0.5 l fed-1 gave the greatest gross sugar %, it could not achieve the highest sugar yield fed-1.
Lateef et al. (Wed,) studied this question.