Types of Garden Enemies
PEONY SCALE (Pseudaonidia paeoniae).
This scale, which is so injurious to southern azaleas, and often to camellias, is scarcely noticeable. It is merely a small brown hump on the bark, but when it dies and falls off it leaves a conspicuous white circle (Figure 50D). Control depends on killing the crawlers in late spring, and the spray must be accurately timed-the end of May or first of June in Alabama. Parathion is excellent, but Volck is safer for you. Use 3 level tablespoons Florida Volck, 2 of powdered derris, and 1 teaspoon Black Leaf 40 to a gallon of water.

PURPLE SCALE (Lepidosaphes bec\ii).
A widely distributed citrus pest, it also occurs on avocado, croton, eucalyptus, fig, olive, and yew. The female is purplish brown, shaped like an oyster, 1/8 inch long. Foliage turns yellow, fruit is stunted and ripening delayed. Usual control is a summer oil, applied in May and July.

ROSE SCALE (Aulacaspis rosae).
This is rather common on climbing roses that are not pruned back and increasingly prevalent on bedding roses as we tend toward more moderate pruning, also found on raspberries and blackberries. Females have circular, rather dirty white shields covering an orange-pink body and red eggs; males are long and thin, pure white. Canes are often thickly encrusted near the base. There are 2 generations in New Jersey with crawlers in May and June and again in August.

Control. For roses a dormant lime-sulfur spray, 1 to 9 dilution applied immediately after pruning but before buds break very far, controls this scale much better than an oil, but the latter may have to be used when roses are on painted trellises or fences or near houses. Cut out canes too thickly populated.

SAN JOSE SCALE (Aspidiotus perniciosus).
This is so named because it was first discovered in San Jose, California; it is now found in every state and on every type of host plant, being particularly injurious to peaches, apples, and other fruits, killing trees if allowed to spread unchecked. Terminal twigs die first, the tree turns yellow and lacks vigor. On fruit a small reddish area surrounds the scale. Females are very small, circular, gray, waxy, elevated in the center into a nipple surrounded by a yellow ring. The male is oblong to oval. Young scales are sooty black and winter on the bark in that form; they mature and mate in spring, give birth to living young. There are 2 to 6 generations a year with most rapid increase in a hot dry season.

Control. Lime-sulfur, 1 to 10 dilution, is frequently used on peaches to take care of scale and leaf curl in one operation. On other fruits a delayed dormant oil spray is more often used. DDT or parathion kills crawlers




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