Notes and Brief Articles 



337 



ease found on the fruit is the so-called anthracnose, which is iden- 

 tical with or closely related to the anthracnose of mango. Avo- 

 cado die-back is of frequent occurrence throughout the Colony. 

 This is due to Diplodia cacaoicola, which also causes die-back of 

 cacao and of rubber. It is thought to enter by way of very young 

 tissues through wounds made by the anthracnose fungus, growing 

 then rapidly down the tree and killing back the shoots for a dis- 

 tance of two or three feet from the tip. The same fungus also 

 attacks budded avocados. 



P homo p sis juniper ovora, a new species causing blight of nur- 

 sery cedars, is described and figured by G. G. Hahn in Phyto- 

 pathology for April, 1920. The disease is known in New York, 

 Pennsylvania, and several states of the middle West. 



Observations on some common and important diseases of the 

 rhododendron on the Pacific Coast, by Henry Schmitz, appeared 

 in Phytopathology for May, 1920. Sporocybe Azaleae attacks the 

 buds and causes them to rot, while Melampsoropsis Piperiana 

 attacks the leaves, producing the so-called " rust." Other fungi 

 attacking the leaves are : Lophodermium Rhododendri, Coco- 

 myces dentatus, Coryneuni Rhododendri, Sphaerella Rhodo- 

 dcndri, P estalozzia Guepini, and Cryptostictis sp. 



A note on our native barberry in connection with wheat rust, 

 contributed by Stakman and Krakover to the May number of 

 Phto pathology, mentions infected bushes found near Blacksburg, 

 Virginia, May 18, 1919, by Fromme and Massey. It might be of 

 interest to say here that in 1897 I made an extended survey of 

 the distribution of Berberis canadensis about Blacksburg and 

 found much of it infected with rust. Also, that the most badly 

 rusted wheat I ever saw was found growing about limestone and 

 shaly knolls covered with barberry bushes. Quantities of this 

 material in various stages was taken by me to Cornell in the fall 

 of 1897 and used there year after year in class demonstration and 

 laboratory work. 



