THE MONTHLY BULLETIN. 



125 



Capsicum (pepper), grape, persimmon, heliotrope, cotton, laurel, wil- 

 lows, Argyreia spcciosa, BryopliyUum calycinum, Pelargonium, Jas- 

 minum, Zizyphus, TylopUora asthmatica, Calotropis procera, Hibiscus 

 esculentus, Acanthus, Seclum, Zamia mexicana, Callacarpa lanata, 

 Ricinus communis. 



Control. — Same as for San Jose scale. 



Natural Enemies. — The two-stabbed ladybird beetle, Cliilocorus 

 Ijivulnerus, feeds upon this scale. 



THE ROSE SCALE. 



Aulacaspis rosw (Bouchg). 



(Fig. lOS.) 



General Appearance. — The female scales are nearly circular with 

 very irregular edges and white to gray in color with reddish body. 

 IS - ^tm The diameter varies from one sixteenth to 



r Jf" one eighth of an inch. The male scales 



k- ^ .1 >" are long and narrow, very minute, with 



• * '^feLA three longitudinal creases, or carina?, and 



the bodies reddish white. 



Life History. — All stages of this scale 

 occur practically throughout the entire 

 year, including the eggs, and its spread is 

 very rapid. The females cluster in great 

 numbers on the canes of berries and roses, 

 especially around the crown of the roots. 

 It is especially abundant during the spring 

 and summer months. It attacks wild and 

 cultivated plants. 



Distribution. — Through the entire State 

 and common in the southern and central 

 parts. 



Food Plants. — Blackberries, raspberries 

 and roses. Abundant on wild blackberries' 

 in the Sacramento Valley. 



Control. — As the eggs are present at 

 practically all seasons and are hard to kill, 

 by either spraying or fumigation, this is a 

 somewhat difficult scale to control. The 

 Avorst infected canes should be cut out and burned and the remaining 

 sprayed successively with kerosene, distillate or carbolic acid emulsion, 

 or with lime-sulphur when the plants are dormant in the winter. 



Fig. 108. — The rose scale 

 Aulacaspis rosce (Bouche) 

 on blackberry. (Essig. P. C. 

 Jr. Ent. ) 



