Technical Abstract: F1024 (PI 658654) sugarbeet, Beta vulgaris L., germplasm with resistance to sugarbeet root maggot (Tetanops myopaeformis von Röder) was released by the USDA-ARS and the North Dakota Agricultural Experiment Station, North Dakota State University, Fargo, North Dakota on 15 December 2009. F1024 was selected from a population formed by crossing F1016, a root maggot resistant germplasm line, with a Cercospora leaf spot (caused by Cercospora beticola Sacc.) resistant breeding line. The population was subjected to three cycles of mass selection for root maggot resistance followed by three cycles of selection among half-sib families. Under natural root maggot infestations, F1024 had a damage rating of 2.1 (0 = no maggot feeding to 9 = >75% of root surface with feeding scars), compared to an average of 6.1 for two susceptible commercial hybrids. In a 2009 Cercospora leaf spot evaluation, F1024 had a significantly lower disease rating than the susceptible check and the difference between F1024 and the resistant checks was not significant. Performance of testcross hybrids between the component half-sib families of F1024 and a susceptible cms line provided additional validation of the potential of root maggot resistant hybrids in areas where root maggot is a perpetual threat.