. - 44 - 



to 100 gallons of water, but more than that amount may damage 

 the buds of some varieties. As much lime as possible should be 

 used so as to make a thick coating. 



KENNETH G. FURLEY. Spraying for Apple Sucker. The Jour, 

 of the Board of Agric., Vol. XVI, No. n, p. 934, Febr. 1910. 

 London. 



In the winter of 1906-07, a number of washes used were tried 

 on seven plantations in Worcestershire, against the eggs of the 

 Apple Sucker, Psytta Mali. The principal washes used were: 

 Lime and salt wash ; strong paraffin emulsion ; lime, sulphur, and 

 caustic soda wash. In addition, six other washes were used, in- 

 cluding medium and weak strengths of paraffin emulsion, Mr. Spencer 

 U. Pickering's paraffin and soda wash, and a lime and paraffin 

 wash. It was also thought advisable to try the ordinary caustic 

 alkali wash, which was at one time thought to have an injurious 

 effect on the eggs, in order to settle once for all that in this re- 

 spect it is useless, and consequently it is a waste of money to 

 apply it. The double strength of caustic soda was used as welL 



The spraying was done in October, November and March, in 

 order to find which month was most suitable, should any of the 

 washes prove successful. The only wash that was found to have 

 any appreciable effect on the ova was the lime and salt wash. In 

 1907-08 this was again tried, and also VI Fluid, a proprietary fluid 

 advertised to destroy the eggs of Apple Sucker. The latter did not 

 prove successful. The lime and salt wash was made according to 

 the following formula : Best selected white lime (freshly burnt) 

 i r / 2 cwt, agricultural salt 30 Ibs., water 100 gallons. The lime is 

 first slaked and should be well stirred until all lumps disappear, 

 when the salt is added. In order to prevent the coating flaking 

 off the trees when dry, several "fixatives " were added to the wash. 

 Of these waterglass at the rate of about 5 Ibs. per TOO gallons was 

 the most effective, but also the most expensive. Powdered alum. 

 3-4 Ibs. per 100 gallons, and a few pounds of soft soap and of 

 paraffin-soap jelly were also found to be more effective than most 

 of the fixatives used. The lime and salt wash was again very ef- 

 ficacious in most cases, although in the first year of application j 

 the infestation was often only reduced. It was found necessary to 1 

 apply it thickly, and the best results were obtained when spraying \ 

 was done as late as possible up to the time when the buds began '< 

 to burst. 



