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.
Minute whitish yellow maggots infesting the roots and stunting the plants.
A large green caterpillar, ringed with black and spotted with yellow, which feeds on the leaves.
Hand-picking as soon as observed.
A greenish caterpillar, feeding on the under side of the leaves.
Spray with arsenicals while the larvae are still young.
A greenish looping caterpillar with white stripes, about 1 1/2 inches long when mature; feeds on the tender leaves.
No satisfactory treatment known.
Glossy black bugs, 1/8 inch in length, that collect in clusters in the axils of the leaflets and cause the plants to wilt.
Kerosene emulsion or tobacco extract.
Blackish plant-lice infesting the leaves and tips of new growth.
Spray as soon as the first lice appear with whale-oil soap or tobacco extract.
Small maggots infesting ripening fruit. Adults are flies with banded wings and insert their eggs under the skin of the fruit.
Spray with arsenate of lead, five pounds in one hundred gallons sweetened with three gallons molasses to kill flies before egg-laying. Should be done when flies first appear, - last of June in New York.
Resembles the San Jose scale.
Same as for San Jose Scale. See Apple.
Larva, 1/2 inch long, blackish and slimy, feeding upon the leaves; two broods.
Arsenicals, hellebore, tobacco extract.
Tips of branches are frequently webbed into nests by colonies of lemon-yellow caterpillars.
Wipe out nests and destroy the caterpillars.
Brownish beetles with extremely long, slender snouts with which they bore holes into the nuts for deposition of eggs. The grubs feed on the kernel, producing wormy nuts.
No satisfactory control measures known.
Catalogue of Insects, continued.