CONFERENCE ON SPRAYING OF FRUIT TREES. 



357 



recommended. Messrs. Voss & Co. send out a tobacco extract, 1 lb. 

 of which equals 3 lb. of tobacco, and makes 10 gallons of wash. 



Time of Application.— Yov aphis and apple-sucker in early spring, 

 best just after the buds have burst. For thrips, &c, in May and June. 

 It may be used at any time, even on opened blossom. 



ACARICIDES for RED SPIDER. 

 Liver of Sulphur (Potassium sulphide). 



Formula : 



Potassium sulphide 3-5 oz. 



Water . 10 gallons. 



Preparation. — Dissolve the substance in water. 



Uses. — This is not only a fungicide, but it is also an acaricide, and may 

 be used on gooseberries for red spider. It may be mixed with paraffin. 

 Its action is somewhat uncertain as an acaricide, however, and its place 

 is being taken by paraffin jelly. 



Liver of Sulphur and Paraffin. 



Formula : 



Iron sulphate 2 oz. 



Quicklime. . . . . . 1 oz. 



Paraffin 16 oz. (liquid.) 



Potassium sulphide 4-6 oz. 



Water, up to 10 gallons. 



Preparation. — Dissolve the iron sulphate in 6 to 7 pints of water, and 

 add to this the quicklime, made into a milk, passing it through a fine 

 sieve, to strain off any grit, and then emulsify the above with 16 liquid 

 ounces of paraffin ; then dissolve the potassium sulphide in 9 gallons of 

 water and pour the emulsion into it and well mix. 



Uses. — This wash may be used in winter on bushes and trees attacked 

 by scale, or in late winter on bushes attacked by red spider. 



If employed in spring half the quantity of potassium sulphide should 

 be used. 



APPENDIX B. 



PRINCIPAL SPRAYS FOR USE AGAINST FUNGI. 

 Compiled by Mr. F. J. Chittenden, F.L.S. 



A. For Winter Use on Dormant Trees only. 



I. Iron Sulphate Solution. 



Iron sulphate (green vitriol or copperas) . 2 lb. 



Water 5 gallons. 



II. Acid Iron Sulphate. 



Iron sulphate 25 lb. 



Strong sulphuric acid . . . .1 pint. 

 Water 50 gallons. 



