Early in the spring of 1921 it became apparent that many clover meadows were suffering severely from some trouble. The entire stand was killed in an occasional field while in others patches throughout the fields were killed or the plants were very much stunted. At first it was thought by many to be winter-killing but it was soon found to be insect injury due to the work of the Clover-leaf Weevil, Hypera punctata Fab., and one or more species of cut worms. It was thought in some quarters that the matter was further complicated by the presence of a fungus disease of the roots. As far as the writer observed this root injury seems to have been an infection naturally following the insect damage.
Proceedings of the Iowa Academy of Science
©1921 Iowa Academy of Science, Inc.
Jaques, H. E.
"The 1921 Outbreak of the Clover-Leaf Weevil in Iowa,"
Proceedings of the Iowa Academy of Science, 28(1), 127-129.
Available at: https://scholarworks.uni.edu/pias/vol28/iss1/27