This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
This whitish, pear-shaped scale, about 1/8 inch in length, often incrusts the bark, giving it a scurfy appearance. It hibernates as purplish eggs under the old scales.
Spray as recommended for oyster-shell scale.
Larvae nearly 2 inches long, spotted and striped with yellow, white, and black; feeding upon the leaves. They congregate in tents or in clusters on the bark at night and in cool weather, and forage out upon the branches during the day.
Arsenicals, as for codlin-moth. Burn out nests with torch, or cut them out and crush the larvae. Pick off egg masses from twigs during winter and spring.
A handsome, redheaded, yellow and black tufted caterpillar, about an inch long, which devours the leaves and sometimes' eats into the fruit.
Collect the frothy egg-masses in fall and winter and band the trees to prevent a reinfestation by migrating caterpillars. Spray with arsenicals as for codlin-moth, taking care to cover the under side of the leaves.
Beetle, 3/8inch long, cylindrical and dark brown, boring into twigs of apple, pear, and other trees. The beetle enters just above a bud.
Burn the twigs. The early stages are passed in dying wood, such as prunings, diseased canes, and in upturned roots. Burn such rubbish, and thus destroy their breeding-places. This is also a grape pest.
Small branches are often girdled by a handsome ash-sprinkled reddish brown beetle, about 1/2 inch in length. The girdled twigs soon fall and the grubs develop in the fallen branches.
Collect and burn all fallen branches.
Small reddish brown plant-lice covered with a conspicuous mass of white, waxy fibers, found on the branches, sprouts, trunks and roots.
For the form above ground drench the infested parts with 15 per cent kerosene emulsion; for the underground form remove the earth beneath the tree to a depth of 3 inches, and apply 10 per cent kerosene emulsion liberally, and replace the earth. In the case of nursery stock the emulsion may be applied in a shallow furrow close to the row. Do not set infested trees.
Apple branches are often defoliated in late summer by colonies of black- and yellow-striped caterpillars about 2 inches in length when mature.
Same as for Red-humped Caterpillar, which see.
Catalogue of Insects, continued.