104 KePOKT of 'I'lIK BoTAMIST OK THE 



tightly to the wood. Between the bark and the wood there may 

 be much fungus mycelinm, probably the mycelium of Irpex lacteus 

 Fr. since pilei of that fungais were found on one of the djdng 

 trunks. One of the diseased trees was dug up for the purpose of 

 examining the roots, which were seemingly healthy and free from 

 fimgus. There was no sharp line of demarcation between the dis- 

 eased and healthy wood at the point where the scion joined the 

 stock. ^^ The trees were thrifty, having been well cultivated and 

 cared for. The cause of this disease is unknown to us. It occurs 

 in other parts of the state, sometimes causing heavy losses. 



BLACKBEimY DISEASES. 



ORANGE BUST. 



(Puccinia peclciana Howe. Syn. Caeoma nitens Schw.) 



Orange rust, although less distructive than usual, was abundant 

 and undoubtedly the worst blackberry disease. For several years 

 W. D. Bams & Son of Middle Hope have persistently fought the 

 disease by digging out and burning the affected plants. It is 

 probable that thas treatment has materially lessened the ravages of 

 the disease, but in spite of their efforts it continues to cause con- 

 siderable damage every season. To get the best results from suck 

 treatment the diseased plants should be removed promptly upon 

 the first appearance of the disease to prevent the spores from 



ripening. 



At Mr. Barns' place our attention was called to an interesting 



effect which rust has upon the canes of raspben-ies and blackbemea. 

 Canes affected with rust were much freer from pricMes^^ than were 

 h^ealthy canes. 



These observations were made on May 8, at which time the 

 rusty canes of the preceding season's growth were easily recognized 

 although the Eecidiospores were not yet mature. Among black- 



11 The stock was peach. 



12 No reference to this phenomenon has been found in the literature at 

 hand. Mr. W. Paddock informs us that he has observed it at Oaks Corners, 

 Ontario county. 



