834 CONNECTICUT EXPERIMENT STATION REPORT, I907-I908. 



gallon of water and 15 c.c. of crude carbolic acid. On this date 

 we were not able to detect any signs of the work of the maggot. 



Rows 9, 10, II and 12 were treated with salt on May 30th by 

 the owner, nearly a teaspoon ful to each plant being placed around 

 the stem at hoeing time. This treatment was evidently too late, 

 as the maggot had already begun its work on some of the plants 

 in the other rows before this date. 



Mr. Walden visited the field May 28th and examined the 

 plants. A few were beginning to wilt from the attacks of the 

 maggot on rows treated with lead arsenate, carbon disulphide and 

 carbolic-lime mixture. On digging, maggots were found at the 

 base of most of these wilted plants. The two rows treated with 

 the tarred paper disks looked the best of any and showed no 

 indication of the presence of maggots. 



On May 29th and 30th, carbon disulphide was injected arotmd 

 each of the plants in the two rows which at setting had been 

 dipped in lead arsenate, and likewise in the two rows treated 

 earlier with carbon disulphide. This time a hole about one inch 

 in diameter and three inches from the stem, slanting toward the 

 root, was made with a pointed stick, and the liquid was injected 

 through an oil can, using one pound to one hundred plants, or 

 about one-sixth of an ounce per plant. 



On June 6th, Mr. Walden visited the field and made a record 

 of the infested plants. Rows i to 5 contained from two to nine 

 infested plants per row, the first four rows each having more than 

 the check (Row 5). Row 8 had four infested plants. Row 6 

 had none and Row 7 had but one. These two rows were treated 

 with the tarred paper disks. Rows 9 to 12 showed no infestation, 

 but as they were not set out until considerably later than the 

 others, it is doubtful if the result should be attributed to the 

 application of salt, which was made too late to entirely keep away 

 the maggots. 



Another examination of the plants was made July 3d, and 

 they were found to be in about the same condition as on June 

 6th, except that those plants which had wilted beyond recovery 

 had been removed, some slightly injured plants had recovered 

 and were beginning to head, and no additional plants showed the 

 attacks of the insect. A few of the plants were well headed and 

 ready to cut. 



