Very few North American grasshoppers are true feeders on conifers. The several species of the punctulatus species-group of the genus Melanoplus, as summarized and revised by Rehn (1946), have been reported as occurring on pine, juniper, and cedar, but few reports of actual feeding on conifers have appeared in the literature. Because of this paucity of information regarding the use of conifers as food for grasshoppers, we summarize here observations of several kinds of grasshoppers feeding on red pine (Pinus resinosa Aiton) in 1966 in Michigan.
McPherson, J. E. and Wilson, Louis F.
"Grasshoppers Feeding on Red Pine Trees in Michigan (Orthoptera: Acrididae),"
The Great Lakes Entomologist, vol 1
Available at: https://scholar.valpo.edu/tgle/vol1/iss7/3