1919] 



DUGGAR AND DAVIS SEED DISINFECTION 



165 



TABLE III 



DISINFECTION OF SEED BY CHLORINATED LIME AND CHLORINATED POTASH 



FINAL OBSERVATIONS AFTER 96 HOURS 



Disinfectant 



Treatment 1 hour 



i 



u O 



O d 



E 



C 

 O 



o 



o 





c 







o 



Treatment i hour 



u C 



1 



E 



o 



G 

 O 



U 





c 



o 



T3 



c 

 o 



U 



Peas 



Corn 



*20% 



20% 

 *10% 



10% 



* 5% 

 5% 



*20% 



20% 

 *10% 



10% 



* 5% 

 5% 



chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 



lime 



lime 



lime 



lime 



lime 



lime 



potash 



potash 



potash 



potash 



potash 



potash 



*20% 

 20% 



•10% 

 10% 



* 5% 



5% 

 *20% 



20% 



*10% 



10% 



* 5% 

 5% 



chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 

 chlor. 



lime 



lime 



lime 



lime 



lime 



lime 



potash 



potash 



potash 



potash 



potash 



potash 



34 



3 



Fair 



100 



6 



Good 



37 



13 



Good 



93 



13 



Good 



75 



6 



Fair 



75 







Good 



80 



20 





75 



13 





77 



22 



Good 



87 



6 



Good 



94 



16 



Good 



93 



13 



Good 



83 







Fair 



88 



20 



Good 



97 



6 



Good 



95 



6 



Good 



88 



6 



Good 



88 







Good 



75 



3 



Good 



67 



6 



Good 



86 







Good 



83 



13 



Good 



81 



23 



Good 



83 



6 



Good 



23 

 87 

 77 

 93 

 77 

 100 

 80 

 87 

 77 

 93 

 77 

 87 



17 







3 





 General 







6 



6 

 50 



6 

 50 







89 

 67 

 67 



72 

 78 

 88 

 75 

 77 

 67 

 83 

 75 

 77 





 

 

 

 10 

 

 

 



General 





 General 

 General 



Fair 



Good 

 Fair 



Good 



Fair 



Good 



Good 

 Good 

 Good 

 Good 

 Good 



Good 



Good 



Fair 



Fair 



Fair 



Fair 



Fair 

 Fair 

 Fair 

 Fair 



* In these cases the seed were soaked for four hours prior to treatment, while 

 in the other cases dry seed were treated. 



Although rather more erratic than results with other hypo- 

 chlorites, the trial was of importance inasmuch as some dishes 

 were free, or practically free, of contamination, and the per- 

 centage of germination relatively high. After further tests, 

 however, it appeared that stronger solutions might be em- 

 ployed, and later a series of experiments was made in which 



this agent was 



ed with the potassium salt and 



chlorazene, as shown by the data in table 



These result 



are much more favorable than before for sodium hypochlorite ; 

 but the uniformly high percentage of germination, the good 

 condition of the seedlings, and the freedom from coutamina- 



