Treatment

Rotation of crops.

Beet Leaf-Hopper (Eutettix Tenella)

A small, pale yellowish green leaf-hopper punctures the leaves, causing, the disease, curly top. Present in the western states.

Treatment

No satisfactory treatment known.

Buster Beetles

See Aster.

Cutworms

See Corn.

False Chinch Bug (Nysius Angustatus variety Minutus)

Small grayish brown bugs, 1/16 inch in length. Destructive to sugar beets grown for seed.

Control

Contact insecticides; clean cultivation.

Grasshoppers

See Corn.

Leaf-Miner

See Spinach.

Larger Beet Leaf-Beetle (Monoxia Puncticollis)

A dull brown beetle with striped wing-covers. Both larvae and adults feed on the sugar beet, often in immense numbers.

Treatment

Same as for Flea-Beetles.

See Potato. Flea-Beetle

See Potato.

Western Beet Beetle (Monoxia Consputa)

A beetle closely allied to the larger beet leaf-beetle, feeding on the leaves, leaving only the veins.

Treatment

Same as for Flea-Beetles. See Potato.

Beet Army Worm (Laphygma Exiqua)

A large caterpillar about 1 1/4 inches long when mature, olivaceous to greenish in color, broadly striped with lighter green; defoliates the plants.

Treatment

See Army Worm, Corn.

Beet Web-Worm (Loxostege Sticticalis)

Pale yellowish green caterpillars striped with lighter green, about 3/4 inch long, frequently defoliate the plants in certain regions.

Treatment

Destroy all weeds. Spray with arsenate of lead.

Begonia. Greenhouse Thrips

See Citrus.

Greenhouse White-Fly

See Tomato.

Mealy-Bugs

See Citrus.

White-Fly

See Citrus.

Berberis. Barberry Plant-Louse (Rhopalosiphium Berberidis)

Small, greenish yellow lice attacking the leaves and young growth.

Treatment

Tobacco extract or kerosene emulsion.

Betula. Birch Aphis (Callipterus Betulascoleus)

A small, yellowish plant-louse occasionally abundant on the under side of birch foliage (cut-leaf varieties).

Treatment

"Black Leaf 40" tobacco extract three-fourths of a pint to one hundred gallons of water.

Birch Leaf Bucculatrix (Bucculatrix Canadensisella)

Small, whitish larvae skeletonizing the leaves.

Treatment

Arsenate of lead, six pounds in one hundred gallons water.

Bronze Birch Borer (Agrilus Anxius)

Slender, flattened yellowish white grubs, 3/4 inch long when full-grown, burrow under the bark on all parts of the tree. The top branch usually dies first and is the first indication that the tree is infested.

Treatment

Cut down and burn all infested trees immediately to prevent spread to other trees.

Frosted Scale

See Apricot. Occurs in California on birch.