Types of Garden Enemies
Fig. 20
Control. Use sabadilla dust for vegetables, DDT for ornamentals.

PHLOX PLANT BUG (Lopidea davisi).
This small bug, 1/4 inch long with dull orange-red wings and a black stripe on the back, feeds on tender leaves and buds of perennial phlox, producing white or pale-green spots on upper leaf surfaces. Plants can be stunted and blossom heads deformed. Eggs are laid in the fall in phlox stems behind leaf petioles and start hatching in May. There may be two or more generations.

Control. Cut and burn old stalks at ground level after frost in autumn. Spray or dust foliage with DDT.

TARNISHED PLANT BUG (Lygus oblineatus).
This bug, present throughout the United States, appears to introduce a poison as it feeds, causing terminal growth of peaches, dahlias, etc., to wilt and turn black, and the buds and flowers of many fruits, vegetables, and ornamentals to be deformed. Peaches are "cat-faced." The bugs hibernate under leaves, stones, or bark and attack fruit-tree buds early in spring, then migrate to garden plants where they lay eggs in stems or flower heads. The nymphs are greenish yellow, marked with black dots. The adult is oval, 54 inch long, brownish with variable markings and a yellow triangle marked with a black dot on the lower third of each side. There are several generations a season.

Control. DDT dust gives satisfactory control but should not be used on edible plant parts within a month of harvest. Sabadilla dust is safe on vegetables. Keeping down weeds around the garden reduces the damage.

YUCCA PLANT BUG (Halticotoma validd).
A very small, bluish-black bug, the nymph stage scarlet, that stipples leaves of yucca and cactus and covers them with black excrement. Spray or dust with DDT.

SQUASH BUG (Anasa tristis).
Found throughout the country on all cucurbits but with a marked preference for squash, the winter varieties particularly, and pumpkin. Small plants are entirely kdled, leaves of' larger plants wilt, turn black and crisp. The adults are brownish black, flat-backed, broad, 5/8 inch long, with an unpleasant odor. Very young nymphs have green abdomens and crimson legs but in older stages are grayish white with black legs. Adults winter in rubbish around the garden, appearing when the vines begin to run to lay brownish eggs in clusters on underside of leaves. When frost kills the vines, adults and nymphs collect on unripe fruits to continue sucking.

Control. Handpick adults and leaves with eggs. Dust with 10 to 20% sabadilla powder or with DDT on varieties not injured by it.

STINK BUGS.
There are several species of these shield-shaped, flattened bugs, green or brownish, with a bad odor.




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