44 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Copper sulphate here shows up in a very disappointing manner. 

 Though Lysol and Carbosol had been put on at double the strength 

 of the previous year they failed to get the upper hand as mercury 

 bichloride, potassium cyanide, and phenol did. Common salt did not 

 quite eliminate the worms, though apparently it is harmful to them. 



Turning next to the plots which were treated, for two years running, 

 with the same substance the results are as follows : 



Table XI. 



riot. 



Substance applied. 



Infection at 

 end ot igi5. 



Infection at 

 end of 1916. 



3 



Potassium sulphate ■ . 



X 



XX 



IO 



Izal . . 





0 



14 



Black Carbolic Disinfectant 



XXX 



X 



15 



Jeyes' Fluid . 



XX 



0 



19 



Lysol .... 



XXX 



XXX 



57 



Creol .... 



XXX 



'XX 



The Lysol result is rather anomalous, and potassium sulphate 

 is not so effective as kainit has shown itself to be, nor yet as good as 

 common salt. Creol lowered the infection, and Izal and Jeyes' Fluid 

 did very well. 



The results of the carbolic group of plots are given in the next 

 table, No. XII., and from it one would conclude that the quantity 

 was too small. Better results were certainly expected, for cresylic 

 acid is said to be more powerful than carbolic acid as a germicide, and 

 242 gallons, 333 gallons, 465 gallons, and 1,089 gaH° ns weigh about 

 1 ton, 1 J tons, 2 tons, and 5 tons respectively. As phenol at 29 cwt. 

 and 34 cwt. does well, and even at 15 cwt. an acre, these large 

 quantities of cresylic acid ought to have done better. The .latter 

 acid does not appear to be as powerful a vermicide as phenol, whatever 

 it may be as a bactericide. 



Table XII. 



Plot. 



Application. 



Quantity 

 applied to 

 the acre. 



Degree of 

 end of 1915. 



Infection at 

 end of 1916. 



35 



Cresylic acid | 



333 gals. 



XXX 



XXX 



36 





333 » 



X 



Tr 



39 



»» • • 



333 i« 



X 



X 



42 



11 • •■* 



4 6 5 11 



XX 



X 



43 



>> • • 



242 ,1 



X 



X 



44 



11 • 



385 1. 



XX 



XX 



61 





1089 „ 



X 



0 



47a 



Phenol . 



29 cwt. 



XX 



0 



476 



> > 



29 11 



XX 



X 



47c 





29 1. 



XX 



0 



47<* 



> > • 



29 11 



XX 



0 



