258 ANNUAL RHPORT OF THE Off. Doc. 



irregularity in results. Yet on peach it may be safer to apply the 

 twenty-five per cent, mechanical mixture, unless either the lime, salt 

 and sulphur or the soap mixture is preferred.* The former may be 

 applied any time when a dry spell seems likely. The latter should 

 be delated just as long as it is safe to do so. 



If undiluted oil is used, it should not be too cold. It is very fluid 

 at ordinary temperatures but thickens a little when they are low. 

 The oil is a bad conductor and if a barrel comes from a room at 

 sixty degrees, it can be completely sprayed out before it loses very 

 much, even in a freezing temperature. 



The horticulturist must ever be observing, ready to act at a mo- 

 ments notice, persistent in the fight, ready to take advantage of 

 any opportunity to lessen the pest and studious to find what is the 

 best practice in his own surroundings. He must not be afraid to 

 try experiments and should not allow an occasional failure to dis- 

 courage him. 



The man who brings the most intelligent consideration to bear 

 upon his own case will be most successful in the end. 



MACHINERY AND HOW TO USE IT. 



Tlie important point to be looked to, if oil is to be used, is the 

 nozzle. Any good pump will do to supply the power; but there must 

 be a Vermorel nozzle with a fine tip to distribute the material. This 

 should be so, even if a mechanical mixture is used. On large trees 

 a group of two nozzles or even a triplet may be used; but always get 

 the cap with the smallest opening. A gas pipe spraying rod ten 

 feet long is an excellent bit of accessory apparatus and it should have 

 a shut off at the bottom. 



For whale oil soap, a Vermorel nozzel wdth an opening of larger 

 size may be used; ©r a Seneca, Bordeaux or McGowan nozzle will 

 answer. For lime, salt and sulphur the Bordeaux nozzle is especially 

 suitable, but there are others that will serve almost equally well. 



The Vermorel nozzle may be obtained from all makers of insecti- 

 cide machinery, and almost every one of these has something that 

 corresponds with the Bordeaux nozzle, throwing an adjustible, fan- 

 shaped spray. It is important that a nozzle for the lime wash be 

 easily cleaned in case it becomes obstructed. 



As to the pump for straight forward spraying, there are so many 

 good machines on the market that it is unjust to recommend any one 



*Tbe tlm«. lalt and sulphur wash it now recommended In prefereoct to all other*. 



