1908.] Brown Scale of Gooseberry and Currant. 199 



are well sprayed as the insects are usually more abundant 

 in such situations than on the exposed and more accessible 

 portions of the bushes. It is also advisable to complete the 

 pruning before spraying operations are commenced ; and in 

 the case of old and badly infested plants it is desirable to 

 remove as much of the old wood as is practicable. The 

 spraying apparatus should have the nozzle fitted at an angle 

 of about 45 degrees so that the spray may be conveniently 

 directed to the under sides of the branches. In the case of 

 the gooseberry, " sponging " or " brushing " is practically 

 impossible owing to the spinose character of the branches. 



(1) Caustic Soda Wash* 



Sulphate of iron ... ... ... ... ... \ lb: 



Lime ... ... ... ... ... ... ... % 



Caustic soda ... ... ... ... ... ... 2 



Paraffin ... ... 5 pints. 



Water to make 10 gallons. 



The wash should be prepared as follows : — (a) Dissolve the 

 iron sulphate in about 9 gallons of water, (b) Shake the lime 

 in a little water and then add a little more water to make it 

 into a milk, (c) Run " b " into " a " through a piece of 

 coarse sacking to 1 keep back grit, (d) Churn the paraffin into 

 the mixture, (e) Add the caustic soda in the powdered con- 

 dition. It is not wise to add the caustic soda till just before 

 using. 



(2) Paraffin-Soda Wash. 



Caustic soda 2 lb. 



Soft soap ... ... ... ... h yj 



Paraffin ' ... 5 pints. 



Water ... ... ... ... ... ... 10 gallons. 



Dissolve the soft soap in a gallon of boiling water. Add the. 

 paraffin while the soft soap solution is still boiling hot, and 

 chum thoroughly until an emulsion is obtained. Dissolve the 

 caustic soda in the rest of the water, just before using, and then ; 

 pour it into the paraffin emulsion, mixing well, and using at once. 



Rubber gloves should be worn by the sprayer as a pro- 

 tection against the effects of the caustic soda, and goggles 

 fitted with a piece of rubber sheeting or waterproof of some 

 kind are an excellent safeguard for the eyes and face. 



* Leaflet No. 70. Board of Agriculture and Fisheries. This is the spray known, 

 as the " Woburn Wash." See Woburn Experimental Fr-uit Farm report for 1906. 



