Oct. 2, 1908.] Agricultural Gazette of N.S.W. 863 



Mussell Scale, Woolly Aphis, Lichen, Moss, &c. 



No. 1. Wohurn* Improved Einulsion : Caustic Winter Wash. — This may 

 be used for removing moss, lichen from trees, and destroying mussel-scale, and 

 possibly some other pests. The wash is identical with the Wol^urn wash, 

 -except that iron sulphate is substituted for soap. 

 Formula. — For 10 gallons of wash : — 



Iron Sulphate ... ... ... ... ^ lb. 



Lime ... ... ... ... ... j ,, 



Caustic 8oda ... ... ... ... 2 ,, 



Parrafin (kerosene) ... ... ... 5 pints. 



Water to make ... ... ... ... 10 gallons. 



Dissolve the iron sulphate in about 9 gallons of water; slake the lime with 

 a little water to make it into milk of lime ; run this into the iron sulphate 

 solution through a piece of sacking, so as to remove any gross particles which 

 might clog the spraying machine. The kerosene is then churned into the 

 mixture, and the caustic soda added. It is not necessary to dissolve this 

 separately in water before adding it, especially if it is in a powdered condition. 



The amounts of the ingredients in this wash may all be varied to a certain 

 extent without affecting the character of it. The kei'osene may be increased or 

 diminished almost ad libitum — -so may the caustic soda ; but if this is reduced 

 below 20 per cent, the cleansing of the trees will not be perfect, and an in- 

 crease beyond this quantity renders the wash more dangerous to the workman. 



No. 2. Woburn Improved Combined Emulsion and Fungicide. 



Formida. — For 10 gallons of wash : — 



Copper sulphate ... ... ... IJ lb. 



Quicklime . ... ... . . J ,, 



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



Kerosene... ... ... ... ... .5 pints. 



Water, to make ... ... ... ... 10 gallons. 



This is made in exactly the same way as the wash with iron sulphate. 

 The amount of copper sulphate given is nearly the same as that used for 

 " normal " Bordeaux mixture. In most cases this mixture will turn grey 

 in the course of a few days, owing to the formation of copper oxide, and in 

 course of time the basic sulphate would probably be entirely converted into 

 oxide, and the mixture would lose its fungicidal properties. Lime-water 

 ■cannot be substituted for milk of lime in this case. 



Aphis, Caterpillars, &c. 



No. .3. Woburn Summer Insecticide and Fungicide. 

 Bordeaux mixture (without caustic soda) may be emulsified with kerosene, 

 and this forms a wash for dpstroying aphis, caterpillars, kc, as well as fungi. 

 Formula. — For 10 gallons of wash: — 



Copper sulphate ... ... ... lOoz. 



Lime-water 8 gallons, ."5 pints. 



Kerosene I pint, 2^ oz. 



Water, to make up to 10 gallons. 



• Eighth Reijort Woburn E.xperimental Fruit Farm. 



