344 CONNECTICUT EXPERIMENT STATION REPORT, IQI2. 



Orange Rust of blackberry, etc., was more common than usual, 

 as was also the Anthracnose of cherry. Sun Scorch and Black 

 Spot of maple were not uncommon. The Bark Disease of chest- 

 nut, on the other hand, seems to have been set back somewhat by 

 the moisture conditions more favorable to its host, since a number 

 of observers reported fewer infections, and old cankers with 

 less vigorous development than in the preceding year. Bacterial 

 Rot of cabbage did some damage in certain fields, and will be 

 described later in this report.* Anthracnose of currants caused 

 considerable .harm by premature defoliation. 



Leaf Spots of horse-chestnut and Boston ivy were more con- 

 spicuous than usual. Leaf Mold of melons caused considerable 

 injury, so that the sprayed vines did much better than those 

 unsprayed. Leaf Curl of peach was more conspicuous by far 

 than we have ever seen it, due to the favorable wet spring; 

 and Scab was also conspicuous. Brown Rot, on the other hand, 

 did comparatively little harm except to certain early varieties 

 like the Champion. This was due in part to the light crop, and 

 in part to the rather dry weather at harvest time. The Bac- 

 terial Blight of pear and quince and the Rust of the latter host 

 were more prevalent than usual, though not very serious. Early 

 Blight of potatoes developed somewhat, and there was consider- 

 able Tip Burn, but little or no Late Blight. There were a few 

 complaints of Yellows of raspberry and Mildew of rose. 



Beside the preceding, there were reported during the two 

 years a number of new or unusual troubles which we shall 

 describe more in detail under the following heads : 



B. DISEASES OR HOSTS NOT PREVIOUSLY REPORTED. 



APPLE, Pyrus Mains. 



RUST, ORANGE, Rcestelia aurantiaca Pk. We have already 

 reported two other species of rusts on the leaves and fruit of 

 apple, but this is the first species we have seen occurring on 

 the stems. This, however, is rather characteristic of the present 

 species, as we have found it on other hosts, the quince and 

 Cratsegus, not uncommon on the twigs. It was sent to the 

 Station from two different localities during the past season, but 

 evidently is not very common on the apple, as we have never col- 

 lected it ourselves on this host. It forms fusiform swellings on 



