. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 44 CEREAL AND FORAGE INSECTS. which gave accurate data upon the time required for the various stages in the life cycle. It is a matter of regret that this system was not discovered during the work in Louisiana, only one similar method being employed. This consisted in suspending a breeding cage from a small scaffold over the growing head and artificially introducing the adult midges from a bell jar. (See fig. 23.) In Louisiana great difficulty in these life-history studies arose from the depredations of the Argen
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 44 CEREAL AND FORAGE INSECTS. which gave accurate data upon the time required for the various stages in the life cycle. It is a matter of regret that this system was not discovered during the work in Louisiana, only one similar method being employed. This consisted in suspending a breeding cage from a small scaffold over the growing head and artificially introducing the adult midges from a bell jar. (See fig. 23.) In Louisiana great difficulty in these life-history studies arose from the depredations of the Argentine ant (Iridomyrmex humilis Mayr).. Fig. 23.—Breeding cage suspended over growing sorghum. Three sides of the cage are covered with cheese cloth; the fourth is fitted with movable glass. With this arrangement artificial breeding of the sorghum midge can be observed under absolutely natural conditions. (Original.) These ants repeatedly gained access to breeding cages in the labora- tory and destroyed the results by extracting the midge pupae from the apex of the seed just prior to emergence, and also by capturing the adults which had succeeded in emerging. HOST PLANTS. In addition to the many varieties of sweet sorghum, the sorghum midge is known to infest broom corn, kahr corn, Johnson" grass, and. 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.
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