48 INJURIOUS INSECTS OF 1909 AND IQIO. 
ing, but it became less and less noticeable toward the last, as the 
second brood of maggots was beginning its work, and the discs had 
by this time become so covered up and out of shape that they were 
of little value. This will be shown best by the following counts. 
The count made on July 14th was as follows: 
RrCAted =e oorncr oer 92 infested, 56 free. 
GWECK rn eae aie oe 172 infested, 15 free. 
AUGUST 3d. 
IMTCATE Gian ee errtee eines 19 infested. 1 free. 
GCheckw tia sche 23 infested, 0 free 
Totalling the counts made on the dates above mentioned, we 
found of the treated plants 241 infested, 99 free; and of the checks, 
346 infested, 37 free. It should be noted here, also, that the marked 
roots in the treated rows were, as a rule, much less badly marked 
than were those in the check rows. It will be noted that the total 
number of counted plants does not equal anywhere near the number 
of plants first regarded as being included in the experiment. This 
was due to the fact that Mr. Fisher had already harvested part of 
the crop when we began counting, and that we left a part of the 
plants uncounted because it did not seem worth while to continue 
the count further. 
On July 16th we also counted the plants which were market- 
able, and were likely to become so, which remained in the treated 
and check rows at this date, part of the harvesting having been 
done. The plants, the heads of which were tied up, were counted, 
and the plants which had begun to develop heads and were large 
and thrifty were also counted separately. The results of these 
counts were as follows, the rows being given in the order of their 
position, T denoting the treated rows, and C denoting the check 
rows : 
Heads not tied up, 
Heads tied up. but of good size. 
GINS > crane rad Calan peice Gee 62 21 
Ys, nish stareispsueren grees eee: 82 27 
Cee ct Aine ete a apasbake eOe 68 20 
AL Se vetien wc snsitawep ates Seaeasgt ets eye 50 21 
Oe saasior RAIS -e oti hore ear 42 5 
MDiea a ohecs seen ewe eps Chote eek 60 13 
