. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 50 SOME INSECTS INJURIOUS TO TRUCK CROPS. tion may not catch the " ; On the other hand, the oil is always sufficiently liquid and does not dry. Neither substance injures the vine, and, although crude oil is the most satisfactory, the tar does very well. BANDING "WITH TANGLEFOOT. It was observed during the season of 1908 and also in 1909 that the beetles did not fly or jump upon the vines, but crawled up the stems. This fact suggested the possibility of keeping them down by means of a sticky b
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 50 SOME INSECTS INJURIOUS TO TRUCK CROPS. tion may not catch the " ; On the other hand, the oil is always sufficiently liquid and does not dry. Neither substance injures the vine, and, although crude oil is the most satisfactory, the tar does very well. BANDING "WITH TANGLEFOOT. It was observed during the season of 1908 and also in 1909 that the beetles did not fly or jump upon the vines, but crawled up the stems. This fact suggested the possibility of keeping them down by means of a sticky band, and a number of experiments were conducted along this Fig. 13.—Hindoo using tarred hand sledge for capture of hop tlea-beetles. (Original.) Fearing that the tanglefoot might injure the tender vines if it was applied directly to them, cotton was first wound around the stems and the tanglefoot smeared over that. The bands were placed 2 feet from the ground, and all near-by leaves removed to prevent the formation of a bridge. Two weeks later the leaves below the bands and all of the leaves of unhanded vines were completely riddled by the beetle, while the leaves which were above the bands were un- touched (fig. 14). It was found that the tanglefoot does not injure the epidermal tissues and can be applied to the most .tender vines. This fact has. 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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