

DISEASES OF PLANTS. 



Andromeda mariana. This species has been determined by C. H. P 

 as a new species to which the name Ramularia cylindriopsis was gi 1 



Notes are given of inoculation experiments conducted by the am 

 and G. \Y. Carver with Oymnosporangium macropus. The life hisl 

 of the fungus is discussed to a considerable extent. The experiuu 

 seem to indicate a great variation in the varieties of apples which 

 subject to attacks of this disease. 



Under the title "belted" apples, the author describes a condi 

 frequently met with in the past season in which apples and pe 

 otherwise perfect, were surrounded near the apex by a russet zone. 

 some cases the use of the Bordeaux mixture was considered to be 

 cause of this abnormal formation, but the author seems to think th; 

 is caused by the freezing of dew collected upon the fruit while yoi 



A new leaf spot of apples, which appears in the form of circ 

 brown dead spots about | of an inch in diameter, is described. '. 

 species, although occurring frequently, has seldom been considere 

 very destructive. The cause of the disease is a new species of P 

 losticta to which the name P. limitata is given by C. H. Peck, 

 fungus is described as follows: 



"Spots small; orbicular, commonly 1 to 3 lines broad, sometimes confluent, In 

 or reddish-brown, occasionally becoming gray or having a grayish center, < 

 sterile, definitely limited and surrounded by a narrow, slightly elevated brow 

 blackish-brown margin, perithecia epiphyllous, few, minute, punctiform, bl 

 spores elliptical, 0.0003 in. long, 0.00016 broad.'' 



Three applications of Bordeaux mixture are recommended for kee] 

 this spot in check. 



Field experiments with potatoes for 1896, B. D. Halsted ( 

 Jersey Stas. Bui. 120, pp. 19, figs. 4). — In continuation of experinn 

 reported in Bulletin 112 and the Annual Report of the station for : 

 (E. S. R., 7, p. 780; 8, p. 893), the author reports upon investigation 

 the prevention of potato scab by the use of various fungicides, 

 the experiments reported in this bulletin sulphur in varying amoi 

 was much more extensively used than in any of the previous tests 



From the details of the experiment given it appears that the r 

 receiving sulphur at the rate of 300 lbs. per acre, in 1895, showe 

 very noticeable diminution in the amount of seab present, seeinin 

 indicate a lasting fungicidal effect of the sulphur. Bordeaux mix 

 and ammoniacal copper carbonate were again tested and showed £ 

 results in checking the scab, but aside from these standard fungic 

 the results indicate that for soil treatment of scab sulphur surpa 

 any of the others. 



Experiments were conducted in which cut seed was rolled in sulp 

 another lot thoroughly dusted with acid phosphate, and a third ^ 

 sulphur and acid phosphate. The cuttings were planted a week 1; 

 and two weeks from that time the plants had come up only from 

 pieces which had been rolled in sulphur and the check. These t 



