ABSTRACT 
Hewitt, G. B. 1977. Review of forage losses caused by rangeland grasshoppers. U.S. Department of 
Agriculture Miscellaneous Publication No. 1348, 24 pp., 1 illus. 
Research studies on forage losses by rangeland grasshoppers have been 
reviewed. Factors that relate to forage losses are discussed (food preference, den- 
sity, habitat, grazing influence, weather, human influence, and physiological 
influences). A listing is given of the most destructive rangeland grasshopper 
species, their area of potential damage, and their preferred food plants. Esti- 
mated amounts of forage lost are listed for populations and certain economic 
species. A means of predicting forage losses once certain information is obtained 
is suggested. 
CONTENTS 
Page 
Trt TOC Ueto 22 a ee 1 
Factors affecting forage consumption by grasshoppers------------------ 2 
Pood: preéterencee sooo 2 
Grasshopperidensity =... = == = = =. Se 5 
abitals prelerenee = s...6 252 Se 5 
Grazing influcnée==. 2522. ee ee ee 6 
Human intlién¢e=-.---==-+—=_=- 25 =_ eee 7 
Weather influence ---___-________________________________________ 7 
Physiological inmtluence se oe ee eee 8 
Histimates. of forage losses<=— =< <a. Soon eee 9 
Quantitative studies on forage losses in areas other than the 
Western United Staves Se ers ees 10 
Forage losses caused by grasshopper populations in the United States---- 11 
Forage losses caused by individual grasshopper species in the 
Witte tates a ee 13 
Summary and recommend atlons ==. 2- == ee ee eee 15 
Selected references ______-__-____-__-__---_- 16 
Appendix tables <=...) 22-2 3 ee 20 
1. Preferred food plants of destructive species ---------------------- 20 
2. Forage losses caused by grasshopper populations--------------__- 22 
3. Forage losses caused by individual species------------------------ 99 
Washington, D.C. Issued December 1977 
For sale by the Superintendent of Documents, U.S. Government Printing Office 
Washington, D.C. 20402 
Stock Number 001-000-03680-7 
