INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



175 



Life History. — The life history of this scale greatly resembles that 

 of the pernicious or San Jose scale, except that it is entirely a leaf 

 and not a bark feeder. 



Distribution.— This scale is 

 very abundant in the central 

 and northern parts of the 

 State. 



Food Plants.— The following 

 pine trees are attacked : digger 

 pine, Monterey pine, yellow 

 pine and knob-cone pine. 



Control.— If necessary, use 

 same remedies as recommended 

 for the San Jose scale. 



THE GREEDY SCALE 



Aspidiotus camelliw Signoret 



(Aspidiotus rapax Comstock) 



(Fig. 154) 



Description. — The scale is 

 thin, light gray, very convex, 

 being noticeably pointed with 

 the dark brown exuvia subcen- 

 tral or near the edge. The sur- 

 face is often roughened by fine 

 concentric ridges. The diam- 

 eter is 1-20 inch. The female 

 body is oblong or nearly circu- 

 lar and yellow. The male scale 

 is not as convex as the female, 

 is more elongated and very 

 much smaller. 



Life History.— The life history is practically the same as that of 

 the San Jose scale. 



Nature of Work.— Though this scale is often abundant upon the 

 limbs and leaves, it seldom does much damage. However, growth is 

 sometimes stunted where infestation covers a long period of time. 



Distribution.— The greedy scale is one of the most common scale 

 insects and occurs throughout the entire State. 



Food Plants.— This species is an omnivorous feeder, attacking a 

 large number of plants, including acacia, almond, apple, buck brush 

 (Ceanothus cuneatus), camellia, camphor, chapparal broom (Bacclmris 

 pilularis), cherry, Cissus, Cottonwood, English ivy, Eucalyptus, Euony- 

 mus, fig, fuchsia, Genista, grape, heath (Erica), mountain holly, honey- 

 locust, Japanese quince, California laurel, Lavatera, locust, mistletoe, 

 myrtle, nightshade, olive, palms, passion vine, pear, pepper tree, Pitto- 

 sporum, pomegranate, quince, red-bud, sage, rose, Sedum, Strelitzia, 

 umbrella tree, English walnut, willow and yam (Dioscorea). 



Fig. 153. — The California pine-leaf scale, 

 Aspidiotus californicus Colm., on the needles 

 of yellow pine. Enlarged twice. (Original) 



