oo THE FLORIDA BUGGIST 
THE CITRUS WHITE FLY (Dialeurodes citri R. & H.) 
It has been known for many years that low temperatures do 
not kill the citrus white fly. It survives on privet in the tem- 
peratures of North Carolina, and the recent cold wave did not 
injure this species on privet in any section of the State. It is 
very doubtful if the recent freeze in Florida has directly killed 
any pupae of the citrus white fly. The defoliation of citrus trees, 
however, has resulted in reducing the number in many places 
and localities to the point of almost complete extermination. 
This is especially true in all the counties of group one. In Put- 
nam and Volusia Counties the only specimens of white fly pupae 
were found on privet, or in groves that had been fired. In 
Marion, and parts of Lake and Orange Counties, a few survived, 
but not sufficient to be of importance for at least a year. This cold 
has given the white fly such a severe setback in these counties 
that it will be many years before it will become as abundant as 
formerly. Examinations made October 3rd still showed this 
pest to be very scarce in this temperature zone. No spraying 
has been necessary to control this pest this season. There were 
a few groves that were fired from which, and the privet, the white 
fly will re-infest all the groves in the community. 
Since there were scattering leaves left on thousands of trees, 
there were many more of the citrus white fly in the counties of 
groups 2 than group 1. Probably not more than 1 pupa in 1000 
emerged. On October 3rd the white fly was about as abundant 
as if no freeze had occurred, and much sooty mold appeared on 
the trees. Many groves should have been sprayed during October 
and November to control this pest. 
In the warmest zone examinations were made only in Pinellas 
County. Although there was considerable defoliation, it was not 
of any great importance in reducing the numbers of the white 
fly. On May 10th there were many groves that needed to be 
sprayed for this insect. On October 3rd the white fly had black- 
ened many groves. More perhaps were present than at any time 
since its first appearance in this section. 
THE CLOUDY-WINGED WHITE FLY (Dialeurodes citrifolit 
MORGAN). 
This species infests only citrus and is found largely on grape- 
fruit. Since the grapefruit suffered such a complete defoliation 
in the counties of both groups 1 and 2, and a much greater de- 
foliation in group two than oranges, this species of white fly has 
