INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



149 



THE EUROPEAN PEACH SCALE 



Lecanium persicce (Fabricius) 



(Coccus persicce Fabricius) 



(Lecanium magnoliarum Cockerell) 



(Fig. 127) 



Description. — The full-grown females of this species are rich chest- 

 nut-brown in color, oval in shape, with the ends pointed and much less 

 convex than the European fruit Leca- 

 nium, which it greatly resembles. The 

 length varies from y'V to T 5 ¥ inch and 

 the width is one fourth less. 



Life History.— The life history of this 

 scale does not differ materially from 

 that of the European fruit Lecanium. 



Nature of Work.— The scales settle 

 upon the stems and smaller limbs and 

 twigs in such numbers as to overlap. 

 Like other members of the genus, the 

 honey-dew and smutting results in the 

 chief injury. 



Distribution.— Under the name of 

 Lecanium magnoliarum 86 Ckll., this 

 scale has been known to exist at San 

 Jose since 1897, ST where it was first col- 

 lected by E. M. Ehrhorn. In the spring 

 of 1914 Earl Morris, horticultural com- 

 missioner of Santa Clara County, col- 

 lected large numbers of the same scale 

 on English ivy at San Jose. The pest 

 was believed to have been introduced 

 from Japan. 



Food Plants. — The following trees are 

 attacked: Elceagnus augustifolia, Eng- 

 lish ivy, ginko, gooseberry, grape, Amer- 

 ican holly {Ilex opac-a) , Japanese quince, 

 magnolia, mulberry, nectarine, peach, 

 pear, plum, rose and silver thorn. 



Control. -Control measures are the Fig 127 _ The European peach 

 same as recommended for the European scale, Lecanium persicce (Fab.), 



<? •, t • on English ivy. Enlarged twice, 



iruit Lecanium. (Original) 



THE FROSTED SCALE 



Lecanium pruinosum Coquillett S8 

 (Fig. 128) 



Description. — The fully-matured females are among the largest of 

 the common California!! unarmored scales, often being nearly ^ inch 



s, Sanders, J. G., Jr. Ec. Ent. II. p. 441, 1909. 

 "'Cockerell, T. D. A., Ent. News IX, pp. 145-146, 1898. 

 S6 Sanders, J. G., Jr. Ec. Ent. II, p. 442, 1909. 



