16 EEPORT OF SEARCH FOE ENEMIES OF CITRUS WHITE FLY. 



The month of August was spent in southern Spam, chiefly at Malaga 

 and Valencia in company with Comte de Montornes, Royal Commis- 

 sioner of Agriculture to the Province of Valencia, and Leopoldo Salas, 

 Agricultural Engineer to the Province of Malaga. During this time 

 the equipment essential in fumigation was acquired until a crew was 

 properly fitted for field work. Demonstration work was then carried 

 on in training the crew until it had become familiar with the general 

 procedure of fumigation. Meanwhile experimental work was being 

 carried on, the results of which furnished a basis for dosage against 

 the msects treated. 



Abundant opportunity was found during this demonstration to 

 study the msect pests of citrus trees in different parts of the country. 



^ 



Fig. 1.— Map shovtiDg present known world distribution of the citrus white fly {Aleyrodes citri). 



(Original.) 



The citrus white fly, however, could not be found m Spain. From 

 Spain the writer continued to Italy and Sicily and these countries 

 were searched but failed to reveal the presence of Aleyrodes citri; 

 nor has this insect ever been found in European orchards. Thus 

 the great citrus belt of Europe, although beset with many injurious 

 insect pests, most of which are mentioned in the appendices of this 

 bulletin, has not yet become infested with this particular menace, 

 the citrus white fly, which has proven so discouraging to the orchard- 

 ists of Florida. 



INVESTIGATIONS IN CEYLON. 



Leaving Naples, direct passage was taken to Ceylon, which was 

 reached September 30. Citrus fruits are not grown commercially 

 in Ceylon, their production being confined to scattering trees, in 

 yards and gardens, and are grown for decorative purposes as well 

 as for fruit. Orange trees do not appear to grow with much vigor 



