ROOT-KNOT DISEASE OF TOMATOS. 39 



Tables III., IV., V.— (cont.). 



in. iv. v. 



No. 

 of 



srlol. . 



Nodules in 



Trim '1 t"r\ 



Roots. 

 p= found 

 a=not found. 



Nodules in 

 Cucumber 



Roots, 

 p = f oun d 

 a=not found. 



Degree of 

 Infection at 

 End of 1914 

 Season. 



1 



Degree of 

 Infection at 

 End of 1915 

 Season. 



Injurious 

 Effect on 

 Tomatos. 



29 



a 



a 



XXX 



O 





31 



a 



a 



X 



O 





34 



a 



a 



X 



O 





41 



a 



a 



xxxx 



O 





45 



a 



a 





O 





46 



a 



a 



X 



O 



i 



2 



a 



p 



XX 



X 





3 



a 



p 



XX 



X 





10 



a 



p 



XX 



X 





15 



a 



P 



XXX 



XX 





19 



a 



P 



xxxx 



XXX 





37 



a 



P 



X 



X 



i 



39 



a 



P 



X 



X 





43 



a 



P 



XX 



X 





14 



P 



P 



XXX 



XXX 





17 



P 



P 



XXX 



XXX 



i 



18 



P 



P 





X 





20 



P 





XXX 



xxxx 





25 



P 



? 



XXX 



xxxx 





27 



P 



P 



xxxx 



xxxx 





32 



P 



P 



XXX 



XXX 





33 





P 



XXX 



XXX 





35 



P p 



P 



XXX 



XXX 





36 



P 





X 



X 





42 



P 



p | 



XXX 



XX 





44 



P 



P 



XXX 



XX 





In Table III. the plots are sorted out into three groups, of which 

 the first nineteen had no nodules in either crop, the next eight had no 

 nodules in the tomatos but there were nodules in the cucumbers 

 which succeeded them, and the last dozen had nodules in both 

 crops. 



Taking the first nineteen and referring to Table IV. it would appear 

 that the results in Plots 4, 5, 7, 23, 24, 29, and 41 are specially good, 

 but 5, 7, 23 were plots on which the plants were abnormal, so that only 

 4, 24, 29, and 41 are the plots left which were entirely satisfactory. 



The substances used on these plots were phenol, potassium cyanide, 

 mercury bichloride, and potassium cyanide respectively. 



Plots 6, 21, 22, and 26 are also interesting, for the disease had 

 apparently been exterminated. Plots 21 and 22, however, were treated 

 with substances which produced stunting of the plants. Plots 6 

 and 26 were dressed with Clubicide and Lysol respectively. 



Regarding the rest of the plots, though it was obvious that many 

 of the treatments had had an inhibiting effect (to say the least for 

 them), we decided that it was rather premature to form any definite 

 opinion. 



