240 DISEASES OF FIELD & GARDEN CROPS. [CH. 



X-IOOO 



FIG. 112. MILDEW OF PARSNIPS. 



Peronospom nivea, Ung., enlarged 400 diameters ; conidia and zoospores, 



enlarged 1000 diameters ; oospore or resting-spore, enlarged 



400 diameters. 



