THE WOOLLY WHITE-FLY. 71 



Aschersonia aleyrodis, in Cuba, and Mr. W. L. Tower, entomolof^ist of 

 the Porto Rican Experiment Station, reports that in Porto liico it 

 is held in check by fungi (undetermined). 



REMEDIES. 



So far as known to the writer no remedial measures have been 

 adopted agamst this pest up to the present time. Its recent dis- 

 covery has not made it possible for experiments leading to its con- 

 trol to be concluded although such experiments are now in progress. 

 From present indications it seems proba])le that this white-fly will 

 be more easily controlled by fumigation than by spraymg, inasmuch 

 as when nearly mature it is very well protected from spray liquids 

 by the secretions mentioned aboA^e. Present indications are that 

 during the early larval instars it is as well controlled by spra^'ing 

 as are the citrus and the spotted-wing white-flies, with which it is 

 found associated. 



78936"— Bull. 64—11 6 



