. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 60 SOME INSECTS INJURIOUS TO TRUCK CROPS. field and at the insectary at Washington, D. C, show that this species is undoubtedly a continuous breeder, as in the case of the variegated cutworm {Peridroma marcjaritosa Haw.), the larvse being present in the field throughout the long summer season of the South. Juh^ 30, by request of the county commissioner, Mr. H. H. Dick- son, the junior author went to the County Home and found a sweet- potato patch badly infested, thousands of larvae present, and the leaves turning
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 60 SOME INSECTS INJURIOUS TO TRUCK CROPS. field and at the insectary at Washington, D. C, show that this species is undoubtedly a continuous breeder, as in the case of the variegated cutworm {Peridroma marcjaritosa Haw.), the larvse being present in the field throughout the long summer season of the South. Juh^ 30, by request of the county commissioner, Mr. H. H. Dick- son, the junior author went to the County Home and found a sweet- potato patch badly infested, thousands of larvae present, and the leaves turning brown and drying out. Superintendent Harris stated that an earlier brood did great damage to cowpeas, but this could not be verified by specimens. In the sweet-potato field the larvae started on the south side and, after stripping the first four or five row^s, moved over to the next rows and eventually infested the entire. Fii;. 10.—TIk' semitroiiical army worm (I'rodciiid criildiiin) : I'ield of late Irish potatoes showing vines entirely stripped by larvoe ; Orlando, Fla., July 6, 1907. (Original.) field. A Mr. Porter, near the County Home, reported 5 acres stripped in three days after the larva? were noticed at work, these having started at one side of the field and swept it clean. The larvae of a third generation were observed at Mr. Cheney's place at this time; most of them, however, had already gone into the earth to transform. August 3, adults that had pupated about July 25 began to emerge. Thus the pupal period occupied about nine days. At this time a number of young larvae were noted feeding upon amaranth, wild Solanum, and castor-oil plants. ^Vlien disturbed they dropped and hung by 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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