CHAPTER XI 

 PRINCIPAL INSECTS AFFECTING CITRUS FRUITS 



PROBABLY the worst pests with which orange and lemon 

 growers have to contend are the various scales found on branches, 

 trunks, twigs, and leaves, and in some instances on the fruit 

 itself. But a number of other insects attacking citrus fruits are 

 discussed in this chapter. 



FIG. 190. The red scale: a, winged male; b, female scale; c, male scale. 



Scale Insects. Among the scale insects may be mentioned 

 the following: (1) The red or orange scale (Chrysomphalus auran- 

 tica) (Fig. 190). 



(2) Yellow scale (C. aurantica var. citrinus). 



(3) The black scale (Saissetia olece) (Fig. 191), indirectly the 

 cause of black fungous growth on the tree. 



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