500 



JOURNAL OF THE ROYAL HORTIC I ■ L TT H AL S()('II<yrV. 



it has an excellent record, both as an insecticide and fungicide, being 

 first used by Oordley of the Oregon station in 1907. 



Details of preparation are given, and a table showing the best 

 times and strengths of application for the various insects and diseases 

 for which the spray is used. — V. G.J, 



Lime-sulphur Sprays. By W. M. Scott {U.S.A. Dep. Agr., 

 Bur. PI. Ind. Bull. 188; March 1910; 8 fig3.).~The russet effect so 

 common on apples sprayed with Bordeaux mixture results from a 

 slight burning of the young fruits caused by the early sprayings. 



The application made as soon as the petals fall, and the one three 

 weeks later, are chiefly responsible for this injury, the older fruit being 

 more resistant. As the young fruit grows the injured portions of the 

 skin become larger, resulting in russet blotches and streaks, which 

 greatly mar the appearance and market value of the mature fruit. 



The foliage is also injuriously affected by applications of Bordeaux 

 mixture. It produces spots, similar to the leaf -spot, and Bordeaux 

 injury is often mistaken for leaf-spot disease. 



Experiments conducted by the writer in Virginia during 19U9 

 indicate that the Virginian apple-growers may largely substitute lime- 

 sulphur preparations for Bordeaux mixture with satisfactory results. 



This paper contains an account of these experiments together with 

 general directions for the treatment of apple diseases in Virginia. 



V. G. J. 



Lime-sulphur Wash, A Chemical Study of. By L. L. Van 



Slyke, 0. G. Hedges, A. W. Bosworth, and P. J. Parrott {U.S.A. Exp. 

 Stn., Bull 319 and 320, Dec, 1909).— These bulletins describe the 

 composition of various commercial preparations, and the influence of 

 conditions of preparation upon the composition of lime-sulphur. 



V. G. J. 



Maize, Diplodia Disease of. By F. D. Heald, E. M. Wilcox, 



and Venus W. Pool {U.S.A. Exp. Stn. Nehrasha, 2271(1 Ann. Rep. 

 pp. 1-22 ; with 21 figs. ; 1909). — This paper gives a very complete 

 account of the life history and parasitism, and of the synonomy, 

 symptoms, and cultural characteristics of the fungus Diplodia Zeae, 

 which causes a very serious " dryrot " of the ear of Indian corn. 



G. F. S.-E. 



Maple Worm, The Green-striped. By L. 0. Howard and 

 F. H. Chittenden {U.S.A. Dep. Agr., Bur. Ent., Circ. 110; 1909).— 

 Anisota rubicu7ida, together with the fall webworm and tussock moth 

 caterpillar, defoliates maples of all kinds, besides other shade trees. 

 There are two or three generations a year. Many birds (but not the 

 English sparrow) feed on the caterpillars, and arsenical spraying is 

 effective if used as directed in Farmer's Bull. 99 and when the cater- 

 pillars are young. Individual choice trees must be protected bv hnnd- 

 ],ickino- the eggs and moths. — C. H. L. 



