Carnation, Cauliflower. 273 



tory, and the greatest reliance was placed upon the production 

 of an extremely fine spray, the particles being so small that 

 they adhered without much difficulty. If thorough applications 

 are made at intervals of one to three weeks, little trouble should 

 be experienced from carnation rust. It is said that the 

 disease may also be controlled by the use of the sulphide of 

 potassium. 



Spot; Blight (Septoria Dianthi, Desm.). Description. The 

 spot of carnations may be recognized by the presence of grayish- 

 brown spots, more or less circular in outline, and surrounded by 

 a conspicuous purple band which is well defined on the inner 

 edge, but mingles with the healthy green tissue at the outer 

 margin (Fig. 50). Both stems and leaves are attacked, and 

 much damage is inflicted. The foliage cannot perform its 

 functions properly, and the stems may be so severely attacked 

 that all portions beyond the diseased areas die. 



Treatment. It is probable that proper application of fungi- 

 cides, as described under RUST, will prevent the malady from 

 becoming serious. 



CATALPA. 

 FUXGOUS DISEASES. 



Leaf Spot (PJiyllosticta Ca talpce, Ell. & Martin ). Description. 

 During early summer the leaves of catalpa trees often become 

 disfigured by circular brown spots which under favorable cir- 

 cumstances increase to such an extent that the trees may almost 

 entirely lose their foliage before the middle of August. When 

 the attack is less severe the affected portions frequently drop 

 from the leaves, causing the latter to be more or less perforated. 



Treatment. Spraying the trees early in the season with the 

 Bordeaux mixture or some other good fungicide would prob- 

 ably largely prevent the trouble. Two or three applications 

 made at intervals of two or three weeks should suffice. 



CAULIFLOWER. 



The enemies and diseases of cauliflowers have been consid- 

 ered under CABBAGE, which see. Care should be taken in 

 treating this crop, that the center or "flower" of the plant 

 remains uninjured by the applications. 



