ii.] CLOVER SICKNESS CLOVER MILDEW. 11 



the best mode of preventing attacks is, where possible, to 

 destroy all clover refuse with fire, and not allow any to 

 rot on the surface of the ground. This treatment will, of 

 course, not only destroy the eggs of any nematoid worms, 

 but the spawn of the other fungi so frequently seen on 

 sickly clover plants in the summer and autumn. 



The Nematodes appear to be attracted to the decayed 

 spots caused by the Peronospora, for in these positions, in 

 company with resting spores of the parasite, which un- 

 doubtedly causes one form of putrescence, we have com- 

 monly found them. 



