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Excerpt from Evaluation in Illinois of Four Inert Dusts on Stored Shelled Corn for Protection Against Insects: A Progress Report All treatments effectively controlled the insect populations for a period of 1 year. All inert dust-treated samples contained insects during the first 3 months but relatively few thereafter. Rice weevils were predominant. All of the inert dust treatments lowered the test weight of the corn. The moisture readings were lowered due to the physical action of the dusts. The malathion-treated corn and the untreated check showed no alteration in the grade factors. The corn treated with silica aerogel was graded sample grade because of the dust, which was considered a foreign substance by the grader. Insect damage to the corn did not increase in the corn treated with inert dust or malathion. There was an increase in insect damage in two of the five untreated checks. Chemical analysis for malathion indicated that about one-fifth (approximately 2 of the malathion applied was present 1 month after treatment. This residue remained virtually constant throughout the remainder of the observation period. In laboratory bioassay tests, the malathion was superior to dust treatments in causing mortal ity, inhibiting reproduction, and reducing the number of emerging test insects. In other laboratory bioassay tests the corn treated with inert dust showed considerable repellency to the test insects. 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.

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