110 Jnl'KNAL OK THE ROYAL HORTICULTURAL SOCIETY. 



Tim only known method of preventing an epidemic through infection 

 of the leaves by Moating spores is spraying. Dilute Bordeaux mixture 

 should bo used ; this, however, is of real service only when applied as a 

 preventive. D<> not wait until damp warm dull days suggest an epidemic ; 

 it is then practically too Late. Spray first about midsummer, and again 



Fki. LM. I'm v join i iioka inkkstans. (( I nrdcncrs' Chronicle.) 

 Showing fungal threads Lciirin^ <ronidiu passing through a stoma, a, stoma 

 111 natural state; 6, stoma distended to allow of passage of the fungal 

 threads. Highly magnified. 



after an interval of a month if the disease has not appeared in the 

 '"(•an! ime. II' there are the slightest signs of the disease, spray at once. 

 Unless Bpraying is properly done, it is absolutely useless. To be well 



done the under surface of the foliage should he thoroughly covered. 

 Add a pound ol soft soap to every five gallons of solution. 



A MOOnd very fertile source of disease is duo to planting infected 



