NOTES AND ABSTEACTS. 



273 



Sphaeropsis malorum, which rarely fruits on Hving apple leaves in New 

 York, as only one of the causes. 



Myxosporium canker, formerly attributed to Macroplioma malorum, 

 should be described under the name Myxosporium corticolum , which 

 also occurs on dead pear bark. 



Scab, Venturia inaequalis, is frequently, in the opinion of the author, 

 indirectly the cause of spray injury, for the cuticle is ruptured by the 

 fungus, and the poisonous compound thus reaches the delicate under- 

 lying cells. Baldwins were more affected than Greenings, Eussets least 

 of all. 



Eust, caused hj Gymnosporangiummacropus, is rarely injurious to 

 apples, though it is common on the alternative host, Juniperus virgin- 

 iana. It is occasionally troublesome, and 'Wealthy,' 'Boiken,' and 

 * Eome ' have been found more susceptible than ' Hubbardston ' and 

 'Sutton,' while 'Mcintosh,' 'Yellow Transparent,' ' Gravenstein,' 

 ' Eed Astrachan, ' and ' Oldenburgh ' were practically immune. Bord- 

 eaux mixture checked the disease. 



Mildew has been found to be due, as in England, exclusively to 

 Podosphaera leucotricha, and the occurrence of perithecia as early as 

 the end of June is reported. ' Black Ben Davis ' and ' Chenango ' are 

 particularly susceptible. 



Sphaerostilhe coccopkila Tul. is reported as growing parasitically 

 on San Jose scale, and doing much to keep it in check in an orchard on 

 Long Island. This fungus does not appear to be an effective check on 

 the scale except in Florida, climatic conditions so far north being 

 usually against it. 



Asparagus. — Eust, Puccinia asparagi, is very prevalent, but it is 

 reported that spraying with Bordeaux mixture is very profitable. 



French hean. — The occurrence of a mildew, probably Erysiphe 

 polygoni, is reported. 



Beech. — Fomes igniarius, F. fomeniarius and F. pinicola, causing 

 decay of the wood, are reported. 



Beet. — Cercospora heticola is a very common cause of a destructive 

 leaf spot on beets in New York, and the evidence suggests the proba- 

 bility of its being carried in the ' seeds.' Phyllosticta hetae has occurred 

 once. 



Begonia. — A mildew (unidentified) and an attack of eelworm are 

 reported. 



Blackberry . — Eust, Gymnogonia Peclciana, is a pest of blackberries 

 and black raspberries ; Kuehneola alhida also occurs. 



Blueberry. — Witch's broom on Yaccinium corymbosum, caused by 

 Calytospora Goeppertiana on Long Island is reported. 



Box. — The failure to root of some box cuttings was found to be 

 associated with the presence of a fungus, Phoma stictica. 



Brussels sprouts were attacked by Plasmodiophora brassicae, but 

 this disease does not appear to be very common. 



Cedar. — The rust, Gymno sporangium nidus-avis, which has as 



VOL. XXXVII. T 



