338 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Peach, Brown-rot Canker. By R. A. Jehle {Phytopathology, 

 iii. p. io6, Apr. 1913 ; plate). — Canker wounds in peaches were found 

 to be due to Sclerotinia cinerea, and successful infection experiments 

 were carried out. Self-boiled lime-sulphur (8-8-50), atomic sulphur 

 (5-50), and sulphur in suspension (5-50) were all found to reduce the 

 infection of the fruit to a very considerable extent. The stem cankers 

 were cut out, the diseased cambium and bark being completely 

 removed, the wound disinfected with corrosive subHmate (i-iooo), 

 and coated with gas tar, with the result that they healed well. — F. J. C. 



( Peach * Frances.' By U. P. Hedrick (U.S.A. Exp. Sin., Geneva, 

 New York, Bull. 364) . — A variety raised in Texas, which is considered 

 likely to fill a gap in the season of American varieties. — E. A. Bd. 



Peach * Miss Lola.' By U. P. Hedrick (U.S.A. Exp. Stn., Geneva, 

 New York, Bull. 364). — This is described as the. best of its season. 

 Extremely hardy and productive. — E. A. Bd. 



Pear * Lucy Duke.' By U. P. Hedrick (U.S.A. Exp. Sin., Geneva, 

 New York, Bull. 364) . — A supposed hybrid between ' Williams ' and 

 ' Winter Nelis.' Was considered by Charles Downing to be not far 

 behind ' Seckel ' in the matter of flavour. Tree characters much resemble 

 ' Winter Nelis. A. Bd. 



Pecans, Some Diseases of. By F. V. Rand (Jour. Agr. Research, 

 i. pp. 303-338 ; Jan. 1914 ; fig.). — Pecan cultivation has recentty 

 spread to a very considerable extent in the States, and it has become 

 necessary to study in some detail the insect and fungus pests to which 

 it is liable. The diseases dealt with do not include " scab," w^hich is 

 a very serious trouble, but " nursery-blight," due to Phyllosticta 

 caryae Peck, is fully described. Only young trees appear to be 

 attacked, and the foliage of these is frequently so peppered with the 

 grey spots produced by the fungus that the growth of the tree is 

 seriously impaired. Brown leaf-spot due to Cercospora fusca is less 

 serious, and may be controlled by three sprayings with Bordeaux 

 mixture. Reddish-brown spots are produced on the leaves, which, as 

 in the case of nursery-blight, are the only parts of the plant attacked. 

 Anthracnose due to Glomerella cingulata (Stonem.) S. and v.S., produces 

 leaf-blotch or " rust " on leaves and nuts. This fungus is better 

 known as Gloeosporium fructigenum and produces bitter rot in apples 

 and grapes, and " anthracnose " in a great number of hosts. " Kernel- 

 spot " is characterized by dark brown or almost black, sunken spots on 

 the kernels, invisible until the latter are freed from the shell. It is 

 found to be due to Coniothyrium caryogenum sp. n. Crown-galls 

 due to Bacillus tumefaciens were found on a few young trees, and 

 the organism was isolated from the tissues. Some excellent figures 

 illustrate the paper. — F. J. C. 



