630 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Apple Scab, On the Use of the Lime-Sulphur Wash against. 



By E. S. Salmon, F.L.S. (Jour. S.E. Agr. Coll., 1911; p. 12).— The 



general absence of *' scab " in the season of 1911 nullified experiments 

 on its control. Most apples were found to withstand spraying with 

 lime-sulphur of a specific gravity of 1.01 and Oox's Orange Pippin at 

 the strength of sp. gr. 1.005 even when two applications were made. 



F. J. G. 



Bark-Weevils of the Genus Pissodes, Contributions towards 



a Monog-raph of the. By A. D. Hopkins, Ph.D. {V.S.A. Dep. 

 Agr., Bur. Entom., Tech ser. xx. pt. 1; Jan. 1911; 22 plates, 

 9 figs.). — The genus Pissodes is of special interest in connexion with 

 forest entomology, and represents an important class of enemies of 

 pine, spruce, and fir trees. For this reason there is likely to be 

 a demand for information on the subject, and for practical methods 

 of preventing or reducing the damage caused by their attacks. Hither- 

 to little has been known of the North American species, and the 

 author of this monograph revises the generic and specific descriptions, 

 describes the species recognized by him as being new to science, 

 and records some of the results of the more technical features of the 

 investigations. — F. G. J. 



Beet Web-worm, The Hawaiian. By H. O. Marsh {U.S.A. 



Dep. Agr., Bur. Entom., Bull. 109, pt. i. ; Nov. 1911; 1 plate, 

 2 figs".). — In the Hawaiian Islands the larvae of the beet web-worm 

 {Hymenia fascialis Cram.) include among their food plants, table and 

 sugar-beets, mangel-wurzels, several species of Amaranthus , Euxolus, 

 purslane, cucumbers, and Chenopodiaceous weeds. Unless it can be 

 controlled it is unlikely that sugar-beet can be profitably grown, as, 

 next to Amaranthus, the beet is its favourite food. 



The author describes experiments carried on with various insecti- 

 cides, the best of which is apparently a solution of 2 lb. Paris 

 green, 8 lb. whale-oil soap in 100 gallons of water. If properly 

 applied to the under surface of the leaves it is absolutely effective 

 in destroying the larvae and does no harm to the foliage. — V. G. J. 



Beet Web-worm, The Southern. By F. H. Chittenden, Sc.D. 

 {U.S.A. Dep. Agr., Bur. Entom., Bull. 109, pt. h. ; Nov. 1911 ; 1 fig.), 

 The Southern Beet web-worm {Pachyzancla hipunctalis Fab.) is allied 

 to the Hawaiian Beet web- worm, and is undoubtedly of tropical 

 origin though inclined to be cosmopolitan in any climate that suits 

 -it. It is recorded from Pernambuco, Bonito, Brazil, Florida, the West 

 Indies, and South Africa. 



A spray of Paris green, as recommended in part i. of this bulletin 

 for the Hawaiian Beet web-form, is the best means of exterminating it. 



V. G. J. 



Bleeding- of Plants. By Wlad. Schaposchnikow {Beih. Bot. Cent. 

 Bd. 28, Abt. i. Heft 3, pp. 487-506; 4 figs.).— The author experi- 



