STATE HORTICULTURAL SOCIETY. 219 



watchfulness some of them, h'uldcn among healtliy canes, would occa- 

 sionally escape notice, mature, and disseminate the rust. Of the two acres 

 before mentioned, not a single stjuare rod of it can now be found which 

 does not contain roots that send up diseased canes. 



But a few days since we inspected a lot of blackberry vines in the 

 grounds of B. L. Kingsbury, a neighbor (^f ours. His canes are growing 

 along a fence. Early this spring the rust appeared on a plant or two, 

 and in a few days spread about two rods, completely covering the under 

 side of all the leaves. But for a thicket of wild growth intervening 

 between these and other canes, it doubtless would have spread much 

 farther. 



Mr. K., fearing to cut and move the bushes lest the jarring should 

 cause the dust to be disseminated to other parts of the ground, by our 

 advice spread among them dry leaves, and burned the whole. Soon 

 after a plant assumes the yellowish hue, its growth is a good deal checked. 

 Under these conditions, each of the affected canes pushes from near the 

 ground a great number of other and smaller canes, or shoots, and each 

 of these being sooner checked than those that preceeded them, pushes a 

 great number of shoots, and each new cane prochiced, as we have 

 described, being incapable of perfecting leaves, the mother plant soon 

 becomes exhausted, and in the following spring rarely produces new 

 growth; or if new canes are produced, they generally show the rust 

 on the first leaves, and are soon killed. Such canes as are afiected late 

 in the f:dl may produce bloom in the following year, but will rarely 

 perfect fruit. We have likewise observed that the same rule will apply 

 to plants which were healthy in the fall which lose their new canes by 

 rust early in the spring, or such as are checked in their growth by it. 

 Whoever is familiar with the yellows of the peach can not but notice 

 the marked resemblance of the eflects of the orange-rust on the black- 

 berry and the yellows on the peach. Indeed, so closely are these two 

 diseases allied that, with the exception of slight diflerences, one descrip- 

 tion would answer well for both. 



The flesh of peaches grown on trees suffering from yellows shows a 

 peculiar logwood-red stain. The subsequent crops of shoots from the 

 canes of the blackberry show the same. The yellowed peach tree 

 exhausts itself by the production of new branches from the axils of all 

 its leaves, or from such buds as under normal concHtions would have 

 remained dormant until the following spring. The blackberry, by 

 pushing buds ordinarily dormant near the roots. The fungi on the 

 peach, though its cells are much smaller, closely resemble those found on 

 the leaf of the blackberry. The cells of each, thougli alike in form and 

 both yellow, diflcr, in that of the blackberry being higher colored. If 

 we are to judge of the relative productiveness of the two kinds of fungi 

 as it occurs on single leaves, then that found on the latter is a thousand 

 times more productive than tiiat of the peach. 



Next to a remedy, it is of interest to know how diseases are dissemi- 

 nated. To determine this point, if possible, with respect to the orange- 

 rust of the blackberry, a few days since, we selected healthy blackberiy 



