76 



Table V. — Effectiveness of Trtatmenls, Littleton, 1923. 



Summary 



The Amherst Experiment. — The experimental field at the Massachusetts Agri- 

 cultural Experiment Station contained twenty-eight rows, twelve feet apart, with 

 nine hills, eight feet apart in each row. Each treatment was applied to each of 

 three separate plots, and each treated plot was flanked by a check plot with which 

 its infestation was compared. The plan was as follows: — 



Four applications were made: on Jul}^ 7, July 17, July 23, and August 2. The 

 first appUcation was made wdth a compressed air spraj^er, and the other three Avith 

 a power outfit. Before the last application it was found necessary to move some 

 runners from the path of the spray rig as it passed between the rows. 



On July 24, a count of eggs and larvae present in the different plots gave the 

 following results : — 



Table VI. — Status of Infestation, Amherst, July £4, 19:23. 



