P, A. VAN DER BlJL 



281 



Inoculated 31. ix. 14. Incubated 25° C. 



Re i.ti.-n on Dates of 

 Fuller's scale examination 



+ 170 



+ 190 



+ 210 



+ 220 



+ 240 



Control 



2. x. 14 

 7. x. 14 



10. x. 14 



2. x. 14 

 7. x. 14 



10. x. 14 



2. x. 14 

 7. x. 14 



10. x. 14 

 2. x. 14 



14 



10. 



2. x 



14 

 10. x. 14 



2. x. 14 



10. x. 14 



Nitric 



Starting 



Vigorous 



Lake brown 



Canary yellow 



(17. 4) 



Starting 



Vigorous. Colour 



as above 



Hydrochloric 



Good 



Rosv flesh 

 (134. 4) 



Feeble 



No growth in any of the tubes 

 No growth in any of the tubes 



Sulphuric 



Starting 

 Vigorous 



Rosy flesh 

 (134. 4) 



Starting 



Good 



Starting 



Feeble growth 



from piece of agar 



on rice 



No better 



Feeble growth, 

 starting 



Vigorous white growth. Colour on glass pearl grey 



(354 4) with, in patches, canary yellow (17. 4). 

 Colour on glass terra cotta (331. 1) and pearl grey. 



Note On the rice kernels small black pycnidia-like bodies were freq»ea%«»bmei 

 Notpores were found in them and they would appear to be of the nature of sclerot.a. 



VI. Experiments in the Laboratory with various Soil Fungicides. 



The quantities stated in the tables below were added to 50 c.c. 

 neutral beef-broth agar. The formalin, carbolic acid and hycol solutions 

 were added after sterilisation and the flasks immediately inoculated. 

 The other substances were added before sterilisation and the flasks 

 then autoclaved. The flasks were inoculated by dropping into them 

 pieces of the fungus on beef-broth agar and then shaking up well. 

 Ill the cultures were incubated at 25° C. and controls in every instance 

 incubated at the same time. 



18—5 



