174 



INSECTS AFFECTING CITRUS FRUITS 



(4) The soft orange scale or broad scale (Coccus hesperidum) 

 (Fig. 192), everywhere very common. 



(5) The cottony cushion scale or ribbed scale (I eery a purchasi) 

 (Fig. 193), one of the pests of citrus fruits, but now held fairly 

 well in check by predaceous insects introduced from Australia. 



(6) The purple scale (Lepidosaphes beckii) (Fig. 194). 



(7) The long scale (Mytilaspis gloveri) (Fig. 195). 



FIG. 191. Black scale. 



(8) In addition, growers have to contend with the circular 

 scale (Aspidiotus ficus) (Fig. 196). 



(9) The greedy scale (A. rapax) (Fig. 197). 



(10) The white scale (A. nerii). There are also two or more 

 troublesome varieties of mealy bugs (Pseudococcus sp.) (Fig. 198). 



Space hardly allows a detailed description of all of the above. 

 They all yield to the same general treatment. Briefly, it may be 

 said that under the chitinous covering referred to as a ' 'scale" 



