. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE BROAD-BEAN WEEVIL. 79 to his OA\'Ti satisfaction. Perfectly air-tight inclosures are difficult to obtain unless specially constructed mth this particular end in view. A fumigator of the type described is illustrated by figure 20. It has a capacity of 100 cubic feet and is suppHed with a pair of tight-closing handles, which are a necessity to prevent warping. Of three fumiga-. FiG. 20.—Fumigator used for stored products infested by insects. (Original.) tors of similar pattern one was constructed with, a single
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE BROAD-BEAN WEEVIL. 79 to his OA\'Ti satisfaction. Perfectly air-tight inclosures are difficult to obtain unless specially constructed mth this particular end in view. A fumigator of the type described is illustrated by figure 20. It has a capacity of 100 cubic feet and is suppHed with a pair of tight-closing handles, which are a necessity to prevent warping. Of three fumiga-. FiG. 20.—Fumigator used for stored products infested by insects. (Original.) tors of similar pattern one was constructed with, a single handle, which was not according to specification, and warped badly in consequence. It should be added that in order to destroy insects in a fumigator or other inclosure at a temperature much below 50° F. a larger quantity of the bisulphid of carbon is necessary than when the temperature is about 80° to 90° Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington : G. P. O.
Size: 1416px × 1765px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectentomology
