@ARTICLE {THOMAS:1997, title = {Evaluating the effects of a biopesticide on populations of the variegated grasshopper, Zonocerus variegatus}, author = {Thomas, M. B. and Langewald, J. and Wood, S. N. }, journal = {Journal of Applied Ecology}, year = {1997}, volume = {33}, pages = {1509--1516}, }