352 CONNECTICUT EXPERIMENT STATION REPORT, IQI2. 
and he also found occasional specimens in orchards. Selby has 
not since found that this was a serious trouble in his state, and 
apparently, the pruning off of the diseased branches is the only 
treatment necessary. From what we have seen of it in Con- 
necticut we do not consider it a disease likely to prove trouble- 
some here. Apparently it develops best on trees in a weakened 
condition. 
It was first found in Connecticut in October, 1911, by Dr. 
Britton, while inspecting one-year-old seedlings in one of the 
nurseries, and later the same nursery company sent the writer 
specimens, writing as follows: “We are sending you under 
separate cover some samples of peach twigs. These were sent us 
by a customer of ours in New York State. We think he planted 
these trees last spring, and he says that he has quite a few where 
the wood is black in the center and the foliage is turning yellow 
and the edges of the leaves have been looking bad since July 
15th.” 
An examination of both sets of specimens showed the fruiting 
stage of the Phoma fungus present. The twigs were partially 
or completely encircled by a depressed band of dead bark of 
varying width. This injury does not immediately kill the parts 
above, as the wood there often forms a greater growth than 
that below the cankers, giving rise to a slight swelling, though 
eventually the parts above afe killed. The leaves turn yellow, 
and finally drop off. Cutting through the wood,.we found a dark 
streak next the cambium, below the canker, but above it this 
was covered by the subsequent growth of the wood which formed 
the swelling. The stems were brittle and easily broken off at 
these areas. The fruiting pustules of the fungus show as small, 
more or less abundant, black specks. From these there ooze 
out the hyaline, oblong to broadly oval spores, which are round 
at the ends, sometimes slightly curved, and 7-10 » long by 3-3.5 4 
wide. 
PINES, Pinus sps. 
PInE-? Sotipaco Rust, Peridermium delicatulum A. & K. 
Plate XVIII a-b. Late in June, 1912, while examining the leaves 
of Pinus rigida at Granby for Peridermium acicolum, we not only 
found specimens of that rust, but also ran across specimens of 
another leaf rust on the same host, which was entirely dif- 
