THE ORANGE APHIS. 73 



When the orangery is well established it will be safe 

 to go over it with a spraying apparatus and a weak 

 kerosene emulsion, say, one part of the emulsion to 25 of 

 water will be quite sufficient for the first dressing. This 

 should, of course, be done either on a dull (not wet) day, 

 or in the cool of the evening. The expense is incon- 

 siderable, and it will pay to do it. In spraying with any 

 material one must always be guided by common sense. 

 We know that a young and tender shoot is more liable to 

 injury than is a branch of the last year's growth. Buds 

 are also easily damaged, so that when spraying with a 

 material of a given strength is recommended it is supposed 

 and hoped that the grower to whom the information is 

 supplied will use some discretion, and take into considera- 

 tion the condition of the plant at time of spraying. 



It is a fact well known to both growers and economic 

 entomologists that certain fruits, even varieties of one 

 race, as apples, pears, &c., will not require or stand 

 spraying with a like proportion of any given material. 

 This must be determined by the experience of the grower, 

 who has the facilities which to the entomologist are often 

 unattainable. 



These remarks will apply generally, but particularly 

 in the case of peaches, plums, &c., also to oranges and 

 other members of the citrus family, so that a little care 

 is all that will be necessary to insure success in the 

 spraying line. 



Should the trees be badly affected a stronger dose of 

 the emulsion must be used, and of late years we have two 

 preparations, one by Messrs. Garrick, the other by Messrs. 

 Martin ; that of the latter firm, of London and Melbourne, 

 would appear to be eminently useful, being both safe 

 and effective. The materials here mentioned are some- 

 what of a novelty, and when they can be made and 

 disposed of at a cheap rate they will in all probability be 

 largely used amongst orchardists, who want something 

 both cheap, practical, safe, and handy. 



Kerosene emulsion is very distasteful to the Aphis family, 

 and the good old tobacco and soft-soap remedy has both 



