Integrated Dodder (CuscutacampestrisYuncker)management in Sugar beet (Beta vulgaris L.) Fields in Miandoab

In order to study of integrated dodder management in Sugar beet, which is spreading in sugar beet field, an experiment was conducted in Azarbayejan-gharbi province in Iran in 2015- 2016. Treatments were seed bed preparation times as main plots, planting date as sub plots and application of different doses of Propizamid (SC50 :1000, 1250 and 1500 gai.ha-1) and Ethofumesate (SC50: 750, 1000 and 1250 gai.ha-1) as sub-sub plots arranged as split-split factorial plot based randomized complete block design. Dodder dry weight and contamination level were evaluated at 30 days after herbicide application and sugar beet root yield was evaluated in the end of experiment. Seed bed preparation time had no significant effect on dodder dry weights. Results indicated that the contamination of level of dodder (EWRC) in the first planting date (39.3%) was less than the second planting date (44.8%). Results also showed that dry weight of dodder in the first planting date was less than the second planting date (49%). The highest root sugar beet yield was obtained from seed bed preparation time in autumn and spring, and planting date in 14 April and also using propyzamid herbicide as 1250 gai.ha-1. Contamination of level of dodder average was less in applied of propyzamid (36.2%) than the Ethofumesate (47.8%). The results of this experiment, as a whole, showed that planting of sugar beet in the 14 April, and also application of propyzamid as 1250 gai.ha-1 for dodder control can be recommended.