292 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



These authorities recommend four applications of lime sulphur against 

 scab : 



ist, just as colour shows itself in blossom buds. 



2nd, just as soon as blossoms fall. 



3rd, two weeks later. 



4th, nine weeks later for apples. 



The addition of lead arseniate adds to the effectiveness of the spray 

 against scab ; thus while the controls gave 100 per cent, infected trees, 

 lime sulphur alone 73 per cent., the addition of lead arseniate reduced 

 the infection to 117 per cent. Pear scab requires constant washing 

 first year, to be effective. Spraying reduced pear scab from 85 per 

 cent, to 4*5 per cent., also increased the quantity of good fruit by 

 sixteen times. — G. P. C. 



Lime Sulphur, Lead Benzoate, and Bordeaux Mixture for Spray- 

 ing Potatoes, A Comparative Test of. By F. C. Stewart and 

 G. T. French (U.S.A. Exp. Stn., New York, Bull. 347).— Lime 

 sulphur 1 in 40, dry lead benzoate 1 lb. in 50 gallons, Bordeaux 

 mixture, 6-6-50, were proportions used in above experiments. Six 

 applications in all, the results being that lead benzoate only equal 

 to control plots, lime sulphur not so good as control plots, Bordeaux 

 strikingly superior. 



In the resulting crops, Bordeaux gave an increase of 100*3 bushels, 

 lead benzoate a decrease of 6 bushels, lime sulphur a decrease of 30/5 

 bushels an acre as compared with unsprayed controls. 



Lime sulphur not only decreased the yield but considerably dwarfs 

 the plant.— G. P. C. 



Lime Sulphur, Spray Injury by. By Errett Wallace (U.S.A. 

 Exp. Stn., Cornell, Bull. 288; December 1910). — Spray injury mostly 

 caused by over-spraying, the fluid running down and forming 

 heavy drops on tips of leaves. As the water evaporates, the lime 

 sulphur becomes concentrated and burning ensues ; the damage 

 being caused by soluble calcium sulphide. 



All types of arsenical washes cause greater injury than lead 

 arseniate in combination with lime sulphur. 



Lime sulphur causes less russeting than Bordeaux, the ratio being 

 as low as 16 per cent, for the former to 58-2 per cent, for the latter. 



G. P. C. 



Lime Sulphur, The Preparation and Use of Concentrated (U.S.A. 

 Exp. Stn., Pennsylvania, Bull. 115). — The above bulletin deals with 

 the manufacturers' side of lime-sulphur washes. 



It is divided into three sections, as follows : — 



(1) The description of materials and apparatus necessary for 

 manufacturing lime sulphur on a large scale. 



(2) The tables of density of sprays and times of application of 

 same, for scale and scab. 



