The Hessian Fly and the Illinois Wheat Crop

Abstract

In order to fight the fly successfully, we had to learn just how it lives through the year, and just
where it is to be found during each season. A vast amount of detailed information on these questions has been accumulated as a basis for practical recommendations, but a brief outline of the main facts in the life history of the insect will serve our present purpose and show why certain methods are here recommended.