CONTEOL OF WHITE GEUBS. 



Experiment X. — Experiment with Carbolineum and Lime Against the White 



Grub. 



The carbolineum, both alone and mixed with liiiu". had appar- 

 ently no effect at all upon the grubs as a killing agent. Whether 

 or not it had any value as a deterrent was determined in a field trial 

 together with a number of other chemicals. The results are shown 

 in the following table: 



Experiment XI. — Experiment with Lime and Combinations of Lime and Other 



Chemicals Against the White Grub. 



The sugar cane used in this experiment was phuitcd in January, 

 lino, and reaped in April, 1911. The lime and other chemicals were 

 applied Alay, 11)10. As is shown hy the table, none of the treated 

 plots did so well as the check plot. Plot 3, although higher in yield 

 per acre, was extraordinarily low in i)\irity, but wlietiier this was 

 due to the treatment received or to some other factor, it is difficult 

 to say. 



The fact that more grubs were found per stool in the check plot 

 Mould suggest that some of the chemicals applied exercised a slight 

 deterrent power, but not sufficient to liave any practical value. 



