350 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



make it much more effectual 

 is made as follows : — 



and this wash, known as the Woburn wash, 



Woburn Winter Wash (A) (non- fungicidal). 



(1) Formula : 



Soft soap . ^ lb. 



Paraffin 5 pints. 



Caustic soda 2 lb. 



Water . 9^ gallons. 



Preparation. — Dissolve the soap in warm water, churn the paraffin 

 into it, and then shake in the caustic soda. This soap emulsion does 

 not seem as good in winter as the metal emulsion, made with iron 

 sulphate. 



(2) Formula : 



Iron sulphate h lb. 



Lime 



Caustic soda 

 Paraffin . 

 Water . 



\ 



lib- 



2 lb. 



5 pints. 

 10 gallons. 



Preparation. — Dissolve the iron sulphate in nine gallons of water ; 

 slake the lime in a little water and then add more, so as to make it into 

 milk of lime ; then run the milk of lime into the dissolved iron sulphate 

 through a fine sieve, to strain off all grit ; then churn the paraffin into the 

 iron sulphate and lime, and finally add the caustic soda. 



Uses. — This wash acts as a cleanser of the trees, removing moss, 

 lichens, algae, &c. It also kills the delicate ova of the mussel scale. 

 The caustic soda does just the same, but is not so rapid in action on the 

 delicate ova of the mussel scale. 



Time of Application. — Any time between November and February. 

 This may be advised as a wash in old orchards, or where mussel scale and 

 oyster shell bark louse are troublesome. 



Woburn Winter Wash (B) (fungicidal). 



It is doubtful whether winter fungicidal washes pay for the cost of 

 material, but if considered necessary the following is the best : — 



Formula : 



Copper sulphate 1^ lb. 



-quick . 



Lime- 

 Paraffin . 

 Caustic soda 

 Water . 



1 lb. 



5 pints. 



2 lb. 



10 gallons. 



in eight or nine gallons of 



/ reparation. — Dissolve the copper sulphate 

 water, slake the lime in water, and add to the dissolved copper sulphate, 

 running it in through a fine sieve, to strain off all grit ; then add the 

 paraffin and churn, and then add the caustic soda and water to bring 

 the whole up to ten gallons. 



