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.
Hand-picking. Avoid planting close to corn or cotton, or after either of these crops or after peas or beans. Practise fall or winter plowing.
A very large green worm feeding upon the stems and leaves of the tomato and husk tomato. Seldom abundant enough to be very serious; kept in check by parasites.
Hand-picking; rotation of crops; clean culture; turkeys.
Tomatoes grown under glass are often badly infested with white flies, the young of which are scale-like and occur on the under side of the leaves.
A small beetle, imported from Europe, which causes great devastation in some of the eastern states by eating the green matter from elm leaves, causing the tree to appear as if scorched.
Arsenate of lead, six pounds to one hundred gallons, just as the eggs are hatching.
A greenish white larva feeding between the two layers of the leaf, causing large blotches; when abundant, the leaf dies and falls. They sometimes kill the trees in two or three years.
While the blotches are small, spray with Black Leaf 40," tobacco extract, one gallon in 800 gallons of water, adding four pounds of whale-oil soap to each hundred gallons.
White to pinkish caterpillars boring at first in the smaller twigs and branches. Later the nearly mature caterpillars attack the larger branches and trunk, doing very serious injury. The white moths, beautifully marked with black and blue, have a wing expanse of about 2 1/3 inches.
Cut off and destroy all infested branches. The spread of the pest is very slow if the branches of the trees do not interlace.
Fumigation when grown under glass.
The adult is a minute mosquito-like fly. The whitish or yellowish maggot feeds in folds of the opening leaves, which become deformed, turn brown, and die.
Fumigation is practically of no value. Thorough hand-picking as soon as any sign of injury is noticed. Do not let the pest become established in the house.
Minute mites which cause the leaves to turn paler and become yellowish.