72 



JOUBNAL OF HOETICULTUEE AND COTTAGE GASDENER. 



[ JoJy 23, 1875. 



Judging from the nature of other resting-spores, the resting- 

 sporo of the Potato disease at first germinates in the earth 

 like Dodder, and if (again like Dodder) it cannot find a fit 

 plant to grow npon it speedily perishes ; but should a Potato 



plant be in the -vicinity, the poiseuone threads of the resting- 

 epore roach it, find their fitting food in it, and doubtless at 

 once enter the skin, as the threads from the more fragile simple 

 spores and zoospores are able to do. When these threads 



W.CS.AD.NATJEL, 



Fig. 9.— The potato ftjnocs and its ebstinq-spoees. 

 Taken from the Stem of one of the Ohiawick plants, 



once get in or on the plant they speedily produce tho simple 

 pporoB just described, and these get blown amongst the Potatoes 

 in every direction, and the regular recurrence of the disease 

 is the result. The conclusion of the sad history is this, that 



when the plants are prostrate and on tbe point of death they 

 beoomn tho prey to insects, as Mr. Berke'ey thirty Tears ago 

 pointed out. Iti the same way the noble lion is preyed upon 

 by baser animals when weak and dying ; but Potatoes are not 



