PESTS AND DISEASES 85 



during the winter season, are grown cool, and perfectly 

 dry, and at no time subjected to close forcing treatment. 



Rust is general mainly on yellow sections of Carnations, 

 rendering the foliage unsightly, and in all cases weakening 

 the plants affected. When noticed, the tips of the leaves 

 should be cut off along with just a little of the clean 

 portion, and the foliage sprayed from time to time, 

 choosing a dry day for the purpose. In America another 

 parasite, Darluca filma, has lately been discovered growing 

 on the rust plant Uromyces caryophyllinum and acting as 

 a destructive agent. 



Spot is a fatal affection, not only to many Carnations, 

 but to Dianthi species. It is called Septoria (Uredo) 

 Dianthi, the ammoniated carbonate of. copper solution 

 already mentioned being a sure repressive remedy, though 

 a continuance of dull, damp weather renders abortive all 

 attempts to stop the disease. Spot is always troublesome 

 in low-lying, damp localities, while it rarely appears where 

 the air is dry, hard, and bracing, and the situation open 

 and exposed. 



