INSECTS, DISEASES, AND SPRAYING J I 



air sprayers, costing about $6, complete, 

 will be very satisfactory. They have a sling 

 and are carried under the arm. The capacity 

 is about two gallons of liquid. The knap- 

 sack sprayer, which is carried on the back as 

 its name Implies, is also quite a good one, 

 but has not the high pressure of the former. 



For field work the size of sprayer would 

 depend on the acreage planted, the kind of 

 sprayer would depend on the man's likes 

 and dislikes and the amount of money he 

 has to invest. For small fields where the 

 grower is just starting in, and wishes to, or 

 has to, practise economy, a barrel pump, 

 mounted in a good oil barrel, with the 

 necessary hose, nozzles, piping, etc., is a very 

 practical outfit. 



A man with some mechanical ability can 

 arrange with gas pipe a four-rowed sprayer, 

 mounting the complete outfit on a two- 

 wheeled rig, having the wheels so that they 

 spread two rows of plants, the horse walking 

 in the middle cultivated strip. With a good 

 horse, one man can pump and drive. 



For larger fields some of the much adver- 

 tised spray rigs with all their equipment are 

 advisable. Some of these sprayers have 



