610 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



3-gallon compressed-air sprayer. This should be done early in the 



morning, while the ants are least active. 



" Inspection should be made weekly for the discovery of rein- 



festedtrees,thebands 

 being renewed where 

 necessary and the 

 branches of the trees 

 kept from coming in 

 contact with weeds 

 or the ground." 



Whiteflies* 



The whiteflies are 

 the most important 

 of the insects attack- 

 ing citrus fruits under 

 the conditions exist- 

 ing in Florida but are 

 not so serious in Cal- 

 ifornia, as they are, 

 as yet, present in that 

 state in only one or 

 two restricted locali- 

 ties. Indications are 

 that, once they are 

 established, they will 

 be as important there 

 as in Florida. 



According to 

 Watson (1. c.) there 

 are eight species of 

 FIG. 532 Adults of the common white fly crowd- wn iteflies attacking 

 mg the under surface of new orange leaves. . . . 



Adults appear slightly less than normal size. Citrus fruits in 

 (Morrill and Back.) U. S. Dept. of Agr. Florida. Two of 



these, the Common Whitefly f and the Cloudy- Winged WhiteflyJ 

 are pests of the first importance while a third is occasionally 



* Family Aleurodidae. 



f Dialeurodes citri R. & H. 



j D. dtrifolii, Morgan. 



