SPRAYING 215 



strengths of nicotine may be added to the 

 Bordeaux, but no additional effectiveness 

 will be given to the mixture as an insecti- 

 cide. Any nicotine solution that is used 

 for Aphis containing four-hundredths of 

 one per cent nicotine will be effective if 

 the work is thoroughly done." 



For greenhouse purposes the Auto Spray 

 No. 1 is a very desirable spraying machine 

 (fig. 43) . It may also be used outdoors on 

 small garden lots. In California, where 

 large acreages of sweet peas are grown for 

 seed, a gasoline sprayer is the proper ma- 

 chine. However, as the plants reach three 

 to four feet and as the rows begin to touch, 

 spraying by power machinery which has to 

 be drawn by horses becomes prohibitive. 

 In this case two to three Auto Sprays No. 1 

 will answer the purpose very well. 



