. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. Fig. 25.—The horse-radish webworm (Plutella armoracia): Moth, side view, above; moth with wings spread below. Enlarged. (Original.) Fig. 26.—The horse-radish web- worm: o, Larva, lateral view; b, larva, dorsal view; c, egg. All enlarged. (Original.) The newly hatched larvae are pale yellow. The mature larvse (fig. 26, a, b) are yellowish green, with a more or less distinct yellow or orange band across the dorsal surface near the middle. Almost immediately after hatching the larvse spin compact webs under which th
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. Fig. 25.—The horse-radish webworm (Plutella armoracia): Moth, side view, above; moth with wings spread below. Enlarged. (Original.) Fig. 26.—The horse-radish web- worm: o, Larva, lateral view; b, larva, dorsal view; c, egg. All enlarged. (Original.) The newly hatched larvae are pale yellow. The mature larvse (fig. 26, a, b) are yellowish green, with a more or less distinct yellow or orange band across the dorsal surface near the middle. Almost immediately after hatching the larvse spin compact webs under which they rest and feed until mature. The webs are white or gray and are remarkably close-meshed. When the horse-radish plants are young the larvae web together and feed on the first spikelike leaves and later a favorite location is among the blossom buds. With older plants the larvae feed on the leaves generally, usually selecting the most tender 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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