ROLE OF NEW HERBICIDES IN DODDER (CUSCUTA CAMPESTRIS) CONTROL IN SUGAR BEET (BETA VULGARIS) FIELDS

Dodder (Cuscuta campestris) control is a challenge and dodder is one of the factors limiting the cultivation of sugar beet in many regions of Iran. New herbicides can be useful in chemical control of dodder. This study was conducted to evaluate the effect of new mixture of herbicides on dodder control in sugar beet field. Results showed that the Propyzamide (3 L ha(-1)) had the highest effect on dodder weed weight loss% and this treatment led to 99.59% reduction in its fresh and dry weight. In addition, herbicide treatments were significant at 0.01 significance level within 15 and 30 days; after this time application of Propyzamide 3 L ha(-1) led to 90.63 and 100% reduction in dodder weed, respectively. The Propyzamide 3 L ha(-1) led to 80.63% increase in sugar beet foliage dry weight within 30 Days After Herbicide Application (DAHA). In addition, between treatments the highest increase percentage of sugar beet yield was obtained by Ethofumesate (2 L ha(-1)) along with Gallant Supper (1 L ha(-1)) and the removal of broad leaf about 86.55% compared to control. Totally, Propyzamide (1.9 L ha(-1)) along with Gallant Supper (0.75 L ha(-)1()) showed the best results with the lowest dosages.