3^4 



Journal of -ii^ri culture. 



[lo June, 1910 



All of the pots 

 were examineii 



carefully every 



week after the 

 tubers began to 

 form. The first 

 indication of dis- 

 ease was noticed 

 on 13th February, 

 w h e n slightly 



brow n patches 

 made their ap- 

 pearance, and by 

 the :!oth these had 

 l)roken into well- 

 defined blotches. 

 It was noticed 

 that the tubers 

 most affected were 

 those that formed 

 near to. or touch- 

 ed, the blind sec- 

 tions, whilst those 

 furthest awav were 

 hut little diseased. 

 In the case of pot 

 No. 4, the pro- 

 duce of this .«et 

 was all diseased — 

 the plant did not 

 produce a single 

 clean tuber. 

 * * * * -x- 



Experiments car- 

 ried out during 

 one season cannot 

 be considered con- 

 clusive, and no- 

 more is claimed 

 for them than an 

 attempt to throw 

 some light on this 

 vexed question. 

 They are sub- 

 m i 1 1 ed without 

 any expression of 

 opinion as to 

 whether the dis- 

 ease is caused bv 

 a fungus or a 

 worm. 



