52 



DESTRUCTIVE INSECTS OF VICTORIA: 



saturating the tree being to cause the liquid to run down 

 and penetrate into the hollow cavity in the young fruit, 

 by which means the newly-hatched grub is destroyed. 

 A second application a few weeks later would be of advan- 

 tage, when there is every reason to believe that the first 

 batch of grubs, at any rate, will be quite destroyed. 



The use of London purple and Paris green (both being 

 of a poisonous nature) has been objected to by niany 

 excellent authorities, but it has been proved, beyond all 

 doubt, by means of carefully conducted experiments 

 carried out in America and elsewhere, that the fruit so 

 treated is perfectly free from even a taint of the poison ; 

 still such materials should always be used with a reason- 

 able amount of precaution. The use of kerosene in an 

 emulsified form is also highly recommended, and for those 

 who wish to try it against the Codlin Moth, I may say that 

 the American formula, as adopted by the late Mr. Crawford 

 and others, coupled with personal observations, is as 

 follows : 



The above, as Mr. Crawford remarks, are the propor- 

 tions to make the strongest wash recommended, being one 

 part kerosene to fourteen parts water. To make the 

 emulsion, if hand soap is used, cut the quantity required 

 into thin slices, so that it should dissolve easily in the 

 proper amount of rain water when being heated to boil- 

 ing point. As soon as it is all dissolved, pour the boiling 

 solution into a vessel containing the kerosene, and churn 

 the mixture for five or ten minutes by means of a garden 

 syringe or force-pump and nozzle. The emulsion, if pro- 

 perly made, forms a cream-like substance, which thickens on 

 cooling, and should, if properly made, adhere without oili- 

 ness to the surface of the glass. The emulsion should not 



