126 



OROMNCHE AS A PARASITE IN BIHAR 



IV. CONCLUSIONS. 



Considering the question whether applications of sodium nitrate can be 

 advocated as a preventive for " tokras " the results of the experiments 

 described in this paper cannot be said to support that view. 



In the case of cabbage the field experiments at Pusa did not show any 

 diminution in the amount of 0. indica in the plot which had the nitrate, 

 relative to that which had not received any nitrate. With mustard, both 

 at Pusa and at Birowlie, it was found that the plot which had the larger 

 number of " tokras " (0. indica) in one season was that which had the larger 

 number in the previous season and that the application of sodium nitrate did 

 not alter these proportions. It is of course not contended that the 

 application of sodium nitrate is without benefit to the mustard but simply 

 that it is not a specific against the "tokra " which is parasitic upon mustard 

 and cabbage 



