Attractiveness of Sweetclover Varieties to the Sweetclover Weevil1

Abstract
Studies conducted during 1953, 1954, and 1955 in Indiana and Minnesota indicated that differences existed in the amount of weevil injury sustained by the sweetclover varieties compared. None of the varieties studied escaped injury, but the Common Whites and Common Yellows consistently sustained less injury than other varieties tested. In general, Spanish was damaged less by the weevil than other varieties with the exception of the Commons. The performance of some varieties in respect to weevil injury was different in Minn, than in Ind. More weevils were noted in Minn, than in Ind. and critical times of infestation in the 2 areas differed. Differences in plant development in Minn, and Ind. may also be related to differences in weevil injury in the 2 places. New Wisconsin selections, A-46 and S-65, showed superior agronomic qualities in Ind., but were more attractive to the sweetclover weevil than most other selections. There was a close correlation between results of field and greenhouse studies in Ind.