oo MISCELLANEOUS PUBLICATION 1348, U.S. DEPARTMENT OF AGRICULTURE 
TABLE 2. — Determination of forage losses caused by grasshopper populations on 
rangeland in the Western United States ' 
Average amount (mg dry-wt) of 
Reference Location vegetation destroyed (consumed 
and wasted) per day by 1 grasshopper 
Anderson, N. L., and J.C. Wright, 1952 Montana Population 1 76.0 
Population 2 91.0 
Hewitt et al., 1976 do = Study 1 26.0 
Study 2 47.3 
Morton, F. A., 1936 do. 44.0 
Morton, F.A.,19389 2. eee 9.0 
Wyoming 24.0 
Nerney, N. J., and A. G. Hamilton, 1966 Arizona 37.0 
Pepper et al., 1951 Montana Site 1 94.0 
Site 2 55.0 
Pfadt, R. E., 1949b Wyoming Density 1 28.2 
Density 2 20.4 
Density 3 23.6 
Average for all determinations 44.3 
* Populations contain both nymphs and adults of several grasshopper species common on rangeland. 
TABLE 3.— Determination of forage losses caused by individual North American grasshopper species 
Reference 
Misra, D. M., and L. G. Putnam, 1966 
Parker, J. R., 1930 
Misra, D. M., and L. G. Putnam, 1966 
Mitchell, J. G., and R. E. Pfadt, 1974 
Parker, J. R., 1930 
Smith, D.S., 1959 
Pruess, K. P., 1970 
Misra, D. M., and L. G. Putnam, 1966 
Putnam, L. G., 1962 
Putnam, L. G., 1962 
Average amount (mg dry-wt) of 
vegetation destroyed (consumed 
Location Species and wasted) per day by 1 
grasshopper 
LABORATORY STUDIES 
Nymphs 
Canada Camnula pellucida 11-7 
United States Melanoplus sanguinipes 127.9 
119.2 
Adults 
Canada C. pellucida 38.7 
United States M. sanguinipes 83.0 
M. foedus 150.0 
Aulocara elliotti 143.0 
= dO------------------------------ M. sanguinipes 42.3 
Canada ——_eesiy--- C3 (2 Sonne enna eo een ror rr PoE 17.9 
20.3 
9.3 
United States Ageneotettix deorum 14.2 
13.6 
FIELD STUDIES 
Nymphs 
Canada C. pellucida 10.1 
oe 0s. 0 19.3 
Amphitnorus coloradus 13.1 
Adults 
Canada C. pellucida 96.0 
A. coloradus 53.0 
' Determined from averaging amounts consumed at different temperatures. 
+ U.S. GOVERNMENT PRINTING OFFICE: 1977 O—233-450 
