Fungoid Diseases of the Carnation: -- 147 
Carnation Spot. 
The above is a well-known disease of Carnations 
on both sides of the Atlantic. It 1s also known as 
Leaf-spot, Septoria Dianthi Desm. and .Uredo 
Dianthi. The fungus lives in the tissue of the 
leaves and when about to develop its spores it pro- 
duces circular or oval spots surrounded by a dark 
purplish band. The grayish centre is marked with 
black specks, which consist of the fungus breaking 
through the skin of the leaf to develop and scatter 
the spores. This fungus also attacks the stem, 
though the spots are less well defined than on the 
leaf. If the disease happens to extend across the 
leaf the portion above the spot dies. 
Whether in pots or in the open ground, Carna- 
tions get affected by Spot under unfavourable con- 
ditions. In the open they are most likely to get 
attacked during long spells of cold wet weather 
during summer or autumn. Under glass a stagnant, 
moist atmosphere is most to be dreaded by Carna- 
tion growers, and means should be taken to dispel 
the moisture. This apples not merely to the plants 
themselevs but also to the cuttings of tree and 
American Carnations while being rooted during 
winter or spring, under the moist conditions of the 
propagating case or in pits. . 
REMEDIES.—Whether in the open or under glass 
Carnation Spot may be combated by the same 
fungicides as recommended for Carnation Rust. 
Spraying with Bordeaux Mixture or potassium 
sulphide can only act by destroying the spores, pre- 
venting them from germinating, and thus holding 
the fungus in check. Cuttings being rooted should 
have the worst leaves removed and burned. The 
spraying should be done earlyin the day, so that the 
foliage may get perfectly dry before night. A 
bright day should be selected for the operation. 
Carnations in pots should be kept cool and dry, 
avoiding spilling water in the house. Less water 
will be required by the roots in winter, but they 
must not be allowed to suffer. The worst leaves 
may always be removed and burnt, especially when 
attacked in autumn. When the plants commence 
growing in spring the disease often. disappears. 
Plenty of ventilation night and day, except in the 
severest weather, is of the utmost importance in 
maintaining the health of Carnations. The crowd- 
ing of the plants must at all times be avoided, and 
