•288 JOUKNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



powder is supposed to be made from the powdered dried flowers of the 

 thru m cincrariw/olium, a hardy perennial, easily raised from seed. 

 It might answer for gardeners to make their own. — C. W. D. 



Raspberry Cane Blight and Raspberry Yellows. By F. C. 



Stewart and 11. .1. Eustace (U.S.A. Exp. Stn. New York, Bull. 226, 

 IS 1 !)<):> ; 6 plates).— Cane blight is caused by a fungus attacking the 

 fruiting cunes (occasionally the first season's canes), causing them either 

 wholly or in part to die suddenly. It frequently starts in a small wound, 

 Uld causes the death of the bark and the wood, thus hindering the passage 

 of water ; the wood becomes discoloured. The fungus was first attributed 

 to a species of Phoma, but is now believed to be Coniothyrium sp. 

 (probably C. Fuckelii, Sacc), and its pycnidia and the exuded spores 

 nr. ( xtremely common on the dead and dying branches. The fungus is 

 parasitic and is disseminated by means of infected nursery stock; by 

 wind, rain, and washing of the soil ; and in picking, pruning, and laying 

 down the canes. Diseased canes should be removed and burnt. 



Bluish-black areas are frequent on the stems of red Raspberries in 

 August and September (generally near the ground), and are caused by a 

 tongue called Sphcerella rubina, Peck, but are in no way connected 

 with the cane blight, and apparently do no harm to the plants. 



' Raspberry Yellows ' is a name applied to a disease especially attacking 

 the Marlboro variety. The plants attacked are characterised by the 

 dwarfed growth, small slightly curved leaves, mottled yellow 7 colour 

 suggestive of Peach yellows, much of the foliage withering, and the drying- 

 up of the berries before ripening takes place, while those that ripen are 

 undersized and insipid. The cause and remedy are not known ; spraying 

 baa no effect. — F. J. C. 



Raspberry Cane Maggot. By W. E. Britton (U.S.A. Exp. Stn. 

 Coin. Eep. of Entomologist, part ii. 1902; 1 fig.). — The maggot of the 

 two-winged fly Vliorbia rubivora, Coquillett, bores into the canes in April, 

 \\ 1h n the latter are only a few inches high, and tunnels only the pith, 

 causing the wilting and death of the shoot. The only remedy is to cut 

 out and burn the infested canes.— F. J. C. 



Raspberry Shoots, Effect of Pinching- back. By F. Cranefield 

 [U.S.A. Exp. Stn. Wisconsin t Rep. 1902; 3 figs.). — The record of experi- 

 mentfl extending over four years shows that in one variety, 'Gregg/ 

 pinching the growing shoots at 18 ins. and 24 ins. increased the yield of 

 fruit and the production of shoots, while pinching at 12 ins. had an 

 injurious effect In the 1 Cuthbert ' variety less fruit and" fewer suckers 

 were the results when pinching back was practised. — F. J. C. 



Ravenelias of the United States and Mexico. By W. H. Long, 

 Jr. [B << . wxv. NO. 2, ]). Ill; 2 plates).— This genus of Uredincre 

 BBemi to be mainly tropical and subtropical, only two species being found 

 a'noM- lat. ::.s . They are confined to the Lcguminosa, and chiefly Cces- 

 alpinea and Mimosea. Two species only occur on Phyllanthus. Twenty 

 •species are described. 



