[Fruit culture] . ^ known as measuringworms or as loopers. The young caterpillars at first eat holesthrough the leaves, but the full-grown caterpillars, one of whichis shown in (6), devour the entire leaves. The caterpillars have,in addition to three pairs of true legs, one pair of prolegs, orleg-like appendages, near the rear of the body with which theyhold to a twig. The caterpillars, especially the young ones,. Fig. 27 have the habit of suspending themselves on fine threads ofsilk from trees. The caterpillars become full grown in 4 or5 weeks and enter the soil, where they pupate and remain
[Fruit culture] . ^ known as measuringworms or as loopers. The young caterpillars at first eat holesthrough the leaves, but the full-grown caterpillars, one of whichis shown in (6), devour the entire leaves. The caterpillars have,in addition to three pairs of true legs, one pair of prolegs, orleg-like appendages, near the rear of the body with which theyhold to a twig. The caterpillars, especially the young ones,. Fig. 27 have the habit of suspending themselves on fine threads ofsilk from trees. The caterpillars become full grown in 4 or5 weeks and enter the soil, where they pupate and remain untilthey emerge the following spring as mature moths. The faU canker worms differ from the spring species in thatthe mature moths emerge from September to December and laytheir eggs, which do not hatch until the following spring; thatthe eggs are laid in clusters of about one himdred each and aredeposited in straight rows; and that the caterpillars have twopairs of prolegs. Orchards that are cultivated annually or that are sprayedannually for codling moth are seldom troubled with cankerworms. Wherever canker worms are troublesome, however,they should be combated by preventing the female moths fromclimbing up the trees to deposit their eggs, or the caterpillars. 42 APPLE PESTS AND INJURIES () while they are feeding on the leaves, may be poisoned by spray-ing with any of the arsenical sprays that have previ
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Keywords: ., bookcentury1900, bookdecad, booksubjectfruitculture, bookyear1912
