MISCELLANEOUS SUBJECTS 653 



was made of the disease on both cultivated and indigenous 

 coffees, and no difference was observable, and having 

 seen H. vastatrix B. et Br. at Durban some years ago, 

 I was able to identify both as H. vastatrix. 



Kew, however, said that the indigenous coffee was 

 suffering from H. Woodl'i, but after further work had 

 been done on the subject, the Kew Bulletin No. 5 of 1913, 

 p. 170, confirmed my original diagnosis by stating that 

 " The chief result of the examination of the various type 

 specimens is therefore the establishment of the fact that 

 there is no record of coffee being attacked by any species 

 of Hemileia other than H . vastatrix." 



Treatment was taken in hand immediately, and it was 

 recommended that where the trees were badly affected 

 they should be uprooted and burned. 



In other cases diseased leaves were picked and burned, 

 and the plants sprayed with either Bordeaux or Burgundy 

 mixtures. Wind breaks and light shading were also 

 recommended. 



NOTE BY MR. SMALL. 



The source of infection was and is most likely the 

 disease as it occurs on native coffee. Experiments have 

 been conducted to determine this point. These are in- 

 complete and will be continued, but so far results have 

 been of a negative kind. In other words, spores of 

 Hemileia from leaves of Coffca robusta. Linden, have 

 failed to infect leaves of cultivated coffee. Transport of 

 Hemileia spores is easily accomplished. Inquiries made 

 in Uganda have shown that the most frequent agency in 

 the spread of infection from one place to another, or 

 from one part of an estate to another, apart from natural 

 agencies such as the wind, has been native labour. 



The drier weather of 1913, especially towards the end 

 of the year, arrested the progress of the leaf disease, and 

 at present before the onset of the April-May rains of 

 1914 many of the estates which were seriously ravaged 

 by the disease are able to show masses of fresh new 

 foliage, new shoots, and prospects of good crops. 



Should this state of affairs be repeated frequently, and 

 should Hemileia be less virulent than before, it is justi- 

 fiable to conclude that the original severity of the outbreak 



