191 1.] International Agricultural Institute. 993; 



was taken in 1909-10. Information is given, however, 

 respecting the position of this country as regards all the 

 scheduled pests, and the reasons which led to their inclusion 

 in the Order. In the case of the Large Larch Saw-fly, special 

 inquiries were made into its prevalence and as to the influence 

 of certain ichneumon and other flies in exterminating it. 



Wart Disease of potatoes received much attention, and as a 

 result of careful inquiry it is stated that— 



1 . The disease known as Wart Disease and by several local 

 names has been present in Great Britain for many years, in 

 some places for more than twenty. In most of the places 

 where it is now found it has been present for seven to ten 

 years, though not all the gardens in those localities are 

 affected even now. 



2. The disease spreads slowly, and in spite of the length of 

 time it has been present in Great Britain it has only spread 

 over a limited area. It is carried from place to place by 

 infected "seed," and once it has become established in a new 

 centre, it is spread chiefly by infected manure produced by 

 animals fed on raw diseased potatoes. 



3. The disease is very difficult to eradicate, and the infec- 

 tion lies in the soil for many years without losing its vitality. 



A number of experiments on Wart Disease were carried 

 out, and the information obtained was communicated to the 

 public by means of a printed memorandum which appeared 

 in this Journal, December, 1909 (p. 762). 



An inquiry was also made as to the Felted Beech Coccus,, 

 and also as regards several local attacks of insects and fungi. 



The Report is illustrated with various coloured maps show- 

 ing the prevalence of American Gooseberry Mildew, the 

 Large Larch Saw-fly, and Wart Disease. 



The Board have received from Mr. Percy C. Wyndham, 

 the British Delegate on the Permanent Committee of the 

 International Agricultural Institute at 

 Rome, the following report, dated 

 January 25th, 191 1, on the work 

 of the Institute during the past 

 year : — 



"I have the honour to report that the International 



Keport on the 

 Work of the 

 International Agri- 

 cultural Institute 

 during 1910. 



