70 PAPERS OX INSECTS AFFECTING VEGETABLES. 



usually exceeds $o a ton. As previously mentioned, a defoliation by 

 the sugar-beet webworm may reduce the yield of sugar beets 1 to 5 

 tons to the acre and also cause a loss in sugar content and purity. 

 As this damage can be absolutely prevented at a cost not exceeding $2 

 an acre, the profits from spraying infested beets are apparent. 



CONCLUSION. 



An easily accessible supply of water will aid materially in keeping 

 down the cost of spraying. TVater from the irrigation laterals 

 may be used, but in all cases it should be carefully strained to pre- 

 vent dirrand other material from getting into the pump and clogging 

 the nozzles. TTater that is highly charged with alkali should be 

 avoided. 



After a sprayer is used it should be carefully washed with clean 

 water and all the working parts thoroughly oiled. It is a mistake to 

 allow a sprayer to stand in the field exposed to sun and weather, and 

 it will pay to keep it housed when not in actual use. 



As a final word, it ma}' be well to state that webworms, and with 

 few exceptions most other insects which affect sugar beets in the 

 Arkansas Valley, can be easily and cheaply controlled. When this 

 fact is more generally accepted by the beet growers it is safe to say 

 that sugar beets will produce still better profit-. 





ADDITIONAL COPIES of this publication 

 -£±- may be procured from the Superintend- 

 ent of Documents, Government Printing 

 Office, Washington, D. C, at 5 cents per copy 



