. Elementary entomology . Fig. 317. The dark-sided cutworm {Agrotis 7nesso7-ia) (After Riley) species of moths of this family, be- longing to several genera. The army-worm lyLeiicania iinipiiiicta) is another caterpillar which or- dinarily feeds unnoticed on rank grasses, but occasionally becomes very numerous and advances in armies, destroying all crops in its line of march. The fall army-worm {Laphygvia frngipci-da) has very similar habits, but is more common in the South and West. Two of the most serious cotton pests are the leaf worm {Alctia argil I a cia) and the bollworm {Hcliothis obso-
. Elementary entomology . Fig. 317. The dark-sided cutworm {Agrotis 7nesso7-ia) (After Riley) species of moths of this family, be- longing to several genera. The army-worm lyLeiicania iinipiiiicta) is another caterpillar which or- dinarily feeds unnoticed on rank grasses, but occasionally becomes very numerous and advances in armies, destroying all crops in its line of march. The fall army-worm {Laphygvia frngipci-da) has very similar habits, but is more common in the South and West. Two of the most serious cotton pests are the leaf worm {Alctia argil I a cia) and the bollworm {Hcliothis obso- leta), although the latter also attacks the ears of corn, tobacco, and green tomatoes throughout the Middle States. A common pest of cabbage and lettuce is the cabbage looper {A u- tographa bj'assicac), a bright green worm with whitish lines, which bores into cabbages much like the common caterpillars of the cab- bage butterfly. It is known as a looper on account of the way in which it "humps" along, much like a measuring worm, be- cause two pairs of the usual abdominal prolegs are lacking. Fig. 318. The cabbasre looper ^ r i i Some of the larger a, male moth ; b, egg shown from above and from side; . r 1 • r -i c, full-grown larva in natural position, feeding ; d, pupa in SpCClCS 01 iniS lamuy, cocoon. (7, c, d, one third larger than natural size ; /', more with 3. wino" expanSC enlarged. (After Howard and Chittenden, United States ^ . ^ , Department of Agriculture) Ot trom tWO tO three
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Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
