Card OHIO EXPERIMENT STATION: BULLETIN 214 
Rust. The development of the early form of the cedar rust sometimes occurs 
upo.: pear as upon apple. 
Sun-Scald is the name applied at times to the trunk injuries upon pear which 
are more commonly but the work of the pear blight bacterium at such points. 
Sooty Disease. A sooty disease of pear fruit like that which occurs upon 
apple (see pages 372-3) likewise occurs upon the fruit and is also controlled by 
similar treatment. 
: PELARGONIUM 
Dropsy. Some varieties of cultivated pelargonium, possibly called begonia, 
suffer seriously from dropsy. One bright scarlet flowered variety in particular 
has been cultivated at the Station. It often suffers from dead spots in the leaves. 
Before these spots in the leaves die, examination will show that there are wet 
looking places upon the under side of the leaf which appear translucent when 
held between the observer and the light. These are nothing more than leafcells 
which have become so gorged with water as to be ruptured. The break down 
extends to adjoining parts and then tends to produce the spots before described. 
This is purely a physiological trouble due to excess of water. The remedy is 
clear. Withhold water until absolutely necessary. 
PEONY 
Stem-Rot—Wilt. Frequent complaint comes to us of the dying of the stems of 
peony. The writer has had similar trouble. The disease has not been fully 
investigated. Massee and others have identified a rot fungus( Botrytis (Sclerotinia) 
paconiae Oud.) to which more or less of the stem rot may possibily be 
referred. The symptoms are a gradual dying of the leaves. Examination 
shows stems to be rotted near the ground or often very much higher. A strong, 
insoluble fungicide might be successfully sprayed upon the stems without cover- 
ing the leaves. 
PEPPERS 
Anthracnose. Two anthracnoses of peppers have been described from New 
Jersey, as occurring upon the leaves of the plants (Gloeosporium piperatum 
(E. & E.) (Colletotrichum nigrum (Ells. & Hals.) although the latter may at 
times be found upon fruits. In addition to these Dr. Halsted has demonstrated 
that cultures of the apple bitter-rot as well as the bean anthracnose, will flourish 
upon fruits of pepper. 
PERSIMMON 
Leaf Diseases. So far as known to the writer no strictly fruit diseases of the 
persimmon occur in our district. Wemay have at least three leaf diseases. 
These are an anthracnose fungus (Glocosporium diospyri (E. & E.), the true 
leaf-spot fungus (Cercospora atra (E. & E.) and a powdery mildew (Podosphaera 
oxyacanthae (D. C.) De By.). The mildew will show like others, as a whitish 
covering upon the leaves, while the others are likely to inflict real injury to the 
leaf tissues. All should be possibly controlled by spraying. 
PHLOX 
Leaf-Spot. Cultivated phlox is frequently attacked by a leaf-spot fungus 
(Septoria divaricatae E. & E.). This mars the appearance of the leaves but is 
not often serious. 
Powdery Mildew. There is a powdery mildew fungus also(Zrysiphe Cichor- 
acearum D. C.) sometimes found upon cultivated phlox. It develops as a whitish 
covering over the leaves and other parts. Both should yield to spraying 
properly done. 
