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.
A scale insect covered with large flocculent masses of pure white wax.
Usually kept in check by its predaceous enemies.
Large indigo-blue (young), or conspicuously banded (last stage) larvae living within the joints of opuntia, causing tumor-like swellings.
Burn injured joints with gasolene torch.
Yellowish caterpillars burrowing in the young joints, thus destroying new growth. Their presence is indicated by exuding sap.
Powdered arsenate of lead dusted on the young growth early in the season.
Brownish yellow bugs about 3/4inch in length injuring the fruit.
Catalogue of Insects, continued.
Destroy the gregarious bugs with the gasolene torch.
Shining, black, wingless beetles 3/4 to 1 inch in length. The larvae burrow in the main stems and older joints of the prickly pear.
Hand-picking the beetles; burning infested stems; spraying with arsenate of lead.
A minute mite found in the buds and instrumental in transmitting the bud-rot disease.
Gather and burn all infested buds.
Small greenish plant-lice infesting the terminal branches.
Fumigation with hydrocyanic acid gas or tobacco.
A reddish brown beetle 1/2 inch or more long, which attacks the young plants. The larva lives in the ground, where it feeds on humus.
Crop-rotation and other remedies for white grub. See under Corn.
Small yellowish-maggots, scarcely 1/8 inch in length when mature, attacking the seeds, terminal buds, ends of branches and leaves, deforming them.
Plow in early fall or late spring to destroy pupae in nurseries. Catalpa Sphinx (Sphinx catalpae). - A sulfur-yellow caterpillar with black head and a broad black stripe down the back, about 2 1/2 inches in length when mature, defoliates the trees. Several broods a season.
Arsenate of lead when the caterpillars are small. Hand-picking later.