Book excerpt: Excerpt from Evaluation of Malathion, Diazinon, a Silica Aerogel, and a Diatomaceous Earth as Protectants on Wheat Against Lesser Grain Borer Attack in Small Bins Malathion, diazinon, and two inert dusts, a silica aerogel and a diatomaceous earth, were compared as protect-ants of wheat against the lesser grain borer in 5-cubic-foot bins for 12 months. The mala thion residues degraded from p.p.m. To p.p.m. During this time. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.