A Dry Rot of the Irish Potato Tuber 
25 
0- septate 18 per cent. 
1- septate 64 per cent. 
2- septate 12 per cent. 
3- septate 5 per cent. 
4- f- septate Few. 
In incubator, potato plugs moist, temperature 25° to 27°C. 
humidity 98 per cent, 70 days old. 
0- septate 7 per cent. 
1- septate 82 per cent. 
2- septate 8 per cent. 
3- septate 2 per cent. 
4- (--septate Few. 
Potato plug dry. 
0- septate 2 per cent. 
1- septate 71 per cent. 
2- septate 20 per cent. 
3- septate 5 per cent. 
4+ -septate Few. 
Average of six tubes. 
0- septate 4 per cent. 
1- septate 80 per cent. 
2- septate 12 per cent. 
3- septate 4 per cent. 
Tubes wraped in black paper, potato plugs dry. temperature 
22° to 25° C, humidity 40 to 55 per cent, 70 days old, in room. 
0- septate . . .Few. 
1- septate 98 per cent. 
2- septate 2 per cent. 
3- f-septate Few. 
Potato plug wet. 
•0-septate 5 per cent. 
1- septate 77 per cent. 
2- septate 13 per cent. 
3- septate 5 per cent. 
4+-septate Few. 
Potato plug always dry. 
0- septate Few. 
1- septate 98 per cent. 
2- septate Few. 
3- septate Few. 
