i\ J. F. shaaV 



117 



The distribution of these numbers of " tokras " is shown on the plan 

 (Text-figure 5), and it is at once clear that the western half of the field contaiia- 

 ed the larger number of " tokras " irrespective of any application of the nitrate. 

 It is most interesting to observe that 0. indica did not come up on the tobacco 

 although in the previous season it had been present on the tomatoes in this 

 field in relatively large numbers. 



Text-figure 5. 



(4) BiROWLiE — Season 1915-16. 



During March 1915 a field of tobacco at Birowlie Indigo Factory was very 

 badly infected with "tokra" of which the vast majority were 0. cemwa and a 

 few 0. indica. A portion of this field was, therefore, selected for experimental 

 work during the cold weather of 1915-16. The experimental area was about 

 one-fifth acre and was divided up into four plots (S, M, 0, P) ; two plots 

 were sown with mustard and two were planted with tobacco at the rate of 

 288 tobacco plants to each plot. One plot each of tobacco (S) and mustard (M) 



