14 



The self-cooking method is not eonsitleretl satisfactory, according to tho 

 V. S. Report quoted above, in which the following remark occurs : — " In the 

 experiments of the Bureau of Entomology this wash has not been satisfactory. 

 .Sufl3cient heat is not generated during the slaking of the lime to bring into 

 solution a sufiicient quantity of sulphur." Nevertheless, Mr. W. E. Scott, whose 

 formula here follows, has had the greatest satisfaction from the self-boiled 

 spray. 



Formula fob Self-boii.ing Lime, Salt and Sulphur. 



To. 1 Si>ray. — For winter use. while the trees are dormant : — 



By W. E. Scott, Ganges Harbour, member of the Board of Horticulture. 



1. Take 20 IT)s. flowers of sulphur and stir into a paste with a little hot 

 water in a coal-oil can. (Refined sulphur should only be used.) 



2. Take 40 lbs. fresh lime — slaked lime is useless. (The better the lime 

 the better the spray.) 



3. *Pour into a 50-gaIlon barrel, from 12 to ].j gallons boiling water and 

 immediately add the lime and sulphur. Cover the mouth of barrel with thick 

 sacks to retain the heat and stir occasionally, whilst dissolving, with a wooden 

 paddle. 



In half an hour the sulphur will be well dissolved, and the mixture is 

 ready for use after adding l.!> 1T:)S. salt and lilling the barrel full up with hot 

 water. 



Strain into the spray barrel through a fine brass-wire sieve to prevent 

 the nozzle clogging. 



General Remarks. 



1. Apply this sjiray as hot as possible, the hotter the better. 



2. A great many authorities omit the salt. The writer favours the use of 

 it on account of it making the solution adhere better to the trees. 



3. A nozzle which will throw a fine mist-like spray should be used, such 

 as the 2 or 3 cluster spra motor nozzle. 



4. Use a good spray pump and apply the mixture with as much force as 

 possible. 



r>. Spraying to be cffirtirc iiiKxt he thorough, so as to cover evenj part of 

 the tree with the mixture. To spray a tree, say 10 to 15 years old, it is 

 necessary to spray from at least two sides, and preferably from three. 



0. A bamboo extension rod. long enough to reach the tops of the trees, 

 should always be used. 



7. To keep the spray pump in good working order, run thmugh about five 

 gallons of clean water every day when you have finished siiraying. This is 

 very hnportunt. 



5. Anyone who has the means of generating steam on the ])lace can 

 improve this mixture by turning steam into the barrel, after it has been self- 

 boiled, for about a quarter of an hour longer. 



*Mr. Scott alliKU'S tn .Vmericin sallon.s in his formiil;v, uiiiial to aliout 42 imnci'ial 

 gallons. 



