During the fall of 1889 the senior author of this paper determined that a species of plant louse, infesting roots of annual grasses was identical with the "Dogwood plant louse" (Schizoneura corni Fabr.), carrying the work far enough to prove that the winged forms could be transferred from grass roots to dogwood, on which they colonized. As he found the root forms principally on annual grasses which were of no economic value, it was naturally a question of interest to determine whether they might affect forage plants. Furthermore, the occurrence of non-migratory forms on certain of the grasses examined, left some questions which it seemed very desirable to follow up.
Proceedings of the Iowa Academy of Sciences
©1894 Iowa Academy of Science, Inc.
Osborn, Herbert and Sirrine, F. A.
"Plant Lice Infesting Grass Roots,"
Proceedings of the Iowa Academy of Science, 2(1), 78-91.
Available at: https://scholarworks.uni.edu/pias/vol2/iss1/24