214 



TREES AS GOOD CITIZENS 



becomes conspicuous on a twig by the 

 appearance of white egg masses resemb 

 ling cotton. The eggs hatch from early 

 summer to August, and soon after hatch 

 ing the young settle on twigs and the 

 underside of leaves and begin to feed, 

 causing the leaves to turn a sickly yellow. 

 Sometimes the leaves become covered 

 with honeydew. Badly infested branches 

 are apt to die. In winter the parent scale, 

 brown in color, oval shaped, and about 

 ^ ff inch long, is found on the under side of 

 twigs and branches. 



ing with a stiff broom over the surface 

 covered by the white egg-masses will 

 probably destroy the eggs and thus prevent 

 the production of a new brood. In some 

 communities the eggs are destroyed by 

 jets of water at high pressure, applied by 

 a power sprayer. Cutting and burning 

 twigs carrying the egg-masses is simple 

 and useful. 



Gloomy Scale 



Habits Although it prefers the soft 



and or silver Maple, this scale is 



Damage, apt to damage all Maples. Its 

 attacks are especially common 

 in the South. In appearance the scale te 

 yellow and shaped like a pouch. The 

 immature scale spends the winter attached 

 to the bark, and devotes the spring to 

 feeding. Its eggs are laid and hatched in 

 the early summer, and the young crawl 

 about for a day or two before settling 

 down to feed and build new scales. Sev 

 eral generations follow the first, during the 

 summer. The presence of the scale is 

 indicated by a roughening of the smooth 

 bark and the appearance of dark gray, 

 scurfy patches with grain-like surface. 

 Wherever the scales may have peeled off, 

 white rings are found. 



Remedy. Miscible oil solution is the 

 most efficient means of con 

 trol. This solution should be applied by 

 spraying during the winter. It will usu 

 ally be found to serve the purpose. 



Terrapin Scale 



Habits This scale takes its name 



and from resemblance to a mini- 



Damage, ature terrapin. It is a raised, 

 reddish scale, ^ to J inch in 

 length and half as wide, with ridges along 

 its edges. The scale encrusts twigs and 

 drains their vitality by sap-sucking, caus 

 ing the foliage to wilt and die. The hatch 

 ing season extends from June through the 

 greater part of the summer, and the young 

 insects, of licelike appearance, infest green 

 shoots and the large veins of the leaves. 

 On the infested twigs, and beneath them, 

 a sootlike growth and honeydew are to be 

 seen. It also infests Oriental Plane. 



Remedies. Early spring spraying 

 applied before the buds have 

 opened, is an efficient method of control 

 ling this insect. For this purpose kerosene 

 emulsion and miscible-oil solution are 

 most satisfactory. 



