EXPERIMENT STATION EEPORT. 557 



applied aceurding to directions, and, in addition, carlxilic acid 

 and slaked lime had been used on the older plants. 



June 7 til, Mr. Dickerson made a final examination and foiTnd;. 

 that there had been very little feeding in the onion patches, the' 

 only sufferers being on the outside or check rows. One row was^- 

 devoted to each of the experiments and the remainder of the patclx 

 Avas treated with the lime and carbolic acid. Mr. Stemler's place- 

 was badlv, infested last year (1905), and this year (1906) the in- 

 festation was so slight that it was scarcely noticeable, while neigh- 

 bors on either side of him have badly infested plots. The planta- 

 tions of 1906 were not far from those of 1905, so that distance could 

 not be responsible for the exemption ; besides, flies were actually- 

 observed on the onion j^lants May 19th. Mr. Steniler furnishes-, 

 details of the applications made. 



Tobacco, white hellebore, kerosene and sand, one row each p 

 kerosene and sand was made by adding one pint of kerosene to- 

 eight quarts of sand. 



First application was very freely applied just before the onions- 

 came up. 



Second application was made three days later. This and all 

 the following were somewhat lighter than the first application. 



Third application was made five days after the second. 



Fourth application was made seven days after the third. 



Fifth application was made seven days- after the fourth. 



Sixth application was made seven days after the fifth. 



Seventh application was made seven days after the sixth. 



In each case the material was put on while the plants were wet^ 

 with dew. 



Scalecide, carbolic emulsion and kerosene emulsion were used 

 as killing agents, each on one row. Scalecide was used 1 to 25 r, 

 carbolic emulsion was used 1 to 50 ; kerosene emulsion was used 

 1 to 12. 



First application was made just as soon as the onions Avere- 

 fairly up. 



Second, third, fourth and fifth applications were made at in- 

 tervals of seven days between each. 



In the field, the first, fifth and ninth rows were left as checks^ 

 where no remedy was applied. On all other parts of the field 

 outside of the experiment and check rows, lime and crude carbolie 



