ines 
~ 
New York AericutruraL Experiment STArIoN. 555 
and from the latter cultures inoculations were made on healthy 
pods kept in moist chambers. These inoculations produced decay 
atthe spots where the virus was introduced, while punctures made 
at the same time, but not inoculated, showed no signs of decay. 
The germ grew less readily on pods of wax or kidney beans kept 
in moist chamber and had but slight effect on the seedlings of 
Phaseolus vulgaris when applied to the unbroken epidermis. The 
tests thus far made indicate that the blight of Lima beans may 
be propagated by planting the diseased seed. The only treatment | 
at present recommended is the selection of healthy seed. 
Bean Rust. 
Uromyces Phaseoli, (Pers.) Winter. 
Figure 9 gives an illustration of the true rust of the common . 
field or garden bean, Phaseolus vulgaris, L. as it appears on the 
leaves and pods. It may be found also on the stalks and petioles. 
So far as is known from our investigations, it is not nearly so 
destructive to beans as either the anthracnose or the blight and 
it is so distinct from either of them that a careful observer will at 
once recognize the difference. It certainly assumes importance in 
some localities, for Dr. Halsted includes bean rust in the class of 
“Worst Fungi of Garden Crops.”* On certain plots of beans 
grown at this Station during the past season the rust was very 
abundant, but the attack came quite late in the season and the 
foliage suffered but slightly as compared with the injury to other 
plots from blight and anthracnose. The disease was seldom 
found on the pods and did no perceptible injury to them. Specimens 
of the fungus were submitted to Prof. George F. Atkinson, who 
reported that “The specimens of Uromyces on Phaseolus vulgaris, 
L. I find on comparison to be the Uromyces appendiculatus (Pers.), 
Ley. It agrees with specimens in Rabenhorst’s Fungi Europaei 
marked No. 1292, U. appendiculatus (Pers.), Lev., and No. 2168 
U. Phaseolarum (Wall.), DBy, a synonymous species. Probably . 
the question as to what the name is is one of synonymy. Uromyces 
Phaseoli (Pers.), Winter§ is probably the name that should be 
used. 
* Proceedings New Jersey Hort. Society, winter meeting 1889-90. 
§ Die Pilze, bd. I., p. 157, Winter’s Rabenhorst’s Kryptogamen Flora. 
