L76 



[NJURIOUS AND BENEFICIAL INSECTS <>F CALIFORNIA. 



Control.— It is seldom, if ever, necessary to use control measures 

 for this scale, but should it prove to be a pest the remedies are the 

 same ;is recommended for the San Jose 



scale. 



Natural Enemies. — The internal 

 hymenopterous p a rasi t e, Aphelinus 

 fuscipennis How. has been reared in 

 ureal numbers from this species. 



THE IVY OR OLEANDER SCALE 



ispidiotus In i/< r<i (Vallot) 



( Chermcs In ih in Yallot ) 



Description. — The female scales are 

 flat, nearly circular, light gray and from 

 1 -120 to r^ inch in diameter. The exuviffi 

 are light yellow and central or sub- 

 rental. The bodies are oval and light 

 yellow. The male scales are light gray, 

 elongated and 1-25 inch long. When 

 feeding upon the fruit of lemons this 

 species often assumes a pinkish color 

 and may he mistaken for the red scale 

 Chrysomphalus aurantii), but the light 

 color of the .scales, the yellow exuviae 

 and the Mat surface make it easily distin- 

 guished from the latter. 



Life History. — The life history is 

 practically the same as that of the San 

 • lose scale. 



Nature of Work.— This species attacks 

 all parts of the host. It is a greenhouse 

 pest and often causes alarm to citrus 

 growers by appearing on the fruit, but 

 it seems p» attack only old "tree ripes" 

 and is of little consequence in this con- 

 nection. Until recently it was thought 

 to he a pest in the olive orchards of the Sacramento Valley, attacking 

 fruits, making them unfit for pickling purposes." 1 



Distribution. — The ivy scale is abundant throughout the State and 

 count ry. 



Food Plants. — Acacia, aloe, asparagus ferns, betel nut, boxwood. 

 buckthorn, butcher's broom, California laurel, camellia, carob, Carpo- 



""It has been recently discovered by Mr. Geo. Coleman that the scale usually found 

 attacking the fruit 01 the olive in the Sacramento Valley is not the ivy or oleander 

 scale, but a closely allied species known as Aspidiotus simillimus translueens Ckll. 

 llus scale greatly resembles the ivy or oleander scale in general appearance and can 

 only be distinguished from it by an expert. Besides the olive it also attacks tea, 

 uoranthus and Dalbergia championii. 



The cyanophyllum scale. Aspidiotus cyanophylli Signoret has been recently taken 

 on grape from the vicinity of Sacramento. It also attacks Cinchona. Cyanophyllum, 

 I ir„s laurel, moonflower, orchids, palms and sago palm. The specimens were deter- 

 mined by Geo. A. Coleman. 



Fig. 154. — The greedy scale, 

 Aspidiotus camelliw Sign., on aca- 

 cia. Enlarged twice. Collected at 

 Ventura by S. H. Essig. (Original) 



