Various insect pests have been suspected of causing the unsatisfactory alfalfa-seed yields that have been obtained in Utah during recent years. No specific information was at hand giving the amount and nature of the damage which these insects were suspected of doing.
Sorenson, Charles J., "Circular No. 98 - Insects in Relation to Alfalfa-Seed Production" (1932). UAES Circulars. Paper 89.