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.
Fumigation with full dosage schedule.
Oval convex, white or pinkish, waxy scales with the upper surface evenly lobed, 1-12 to 1/8 inch in diameter.
Resin wash or kerosene emulsion applied to the young scales before the waxy covering is formed.
Closely resembles the purple scale, but is longer and narrower.
-Same as for Purple Scale, which see.
A slender, minute, yellowish brown insect destroying the blossoms and russeting the fruit.
Same as for Citrus Thrips, which see.
A smooth, oval, convex soft scale without markings. Common in greenhouses.
Same as for Black Scale, which see.
Small, soft-bodied scale insects, 1/4 to 3/8 inch long, covered with a white waxy secretion.
A thorough application of carbolic acid emulsion; spray under heavy pressure.
Small white maggots burrowing in a great variety of soft, juicy fruits. The parent fly is about the size of the house fly, yellowish marked with black, and with faintly banded wings. Widely distributed in the tropical and subtropical regions of the world and a most serious horticultural pest wherever it occurs. Rigid quarantine regulations have prevented its introduction into the United States.
Sweetened arsenate of lead to kill the flies before oviposition.
Elongate, blackish brown scale with a gray margin and dark yellow exuviae.
Fumigation; kerosene emulsion, one part in five parts of water; three applications at three-week intervals.
Dirty white maggots, about 1/2 inch in length when mature, burrowing in the pulp. From four to twenty maggots may occur in a single orange. The adult two-winged fly is straw-yellow in color with brownish markings and bands on the wings. A serious pest to oranges in Mexico.
Pick up and destroy all infested fruit.
Catalogue of Insects, continued.
Greenish white to dark, irregularly striped caterpillars, 1/2 inch long when mature, that burrow into the rind and induce decay.
Destroy all infested fruit.
Reddish brown to rich purple oyster-shell-shaped scales 1/16 to 1/8 inch in length.
Fumigate with full dosage schedule.
Circular, flat, reddish scales, 1/16 to 1/8 inch in diameter.