120 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
The unsprayed rows died about three weeks earlier than the 
sprayed. The test rows were dug by hand and much care taken 
to secure accurate weights. There was no rot on either the sprayed 
or the unsprayed rows. ‘The variety was Rural New Yorker No. 2. 
Experiment No. 10.— The unsprayed rows were dead three weeks 
before the sprayed ones. Mr. Sterling writes as follows: “ The 
spraying also lessened the work of digging by half as the rank 
foliage kept down the late grass and weeds. On the unsprayed 
rows the grass and weeds were very bad and made digging very 
difficult.” | 
Experiment No. I1.— Concerning the blight on the unsprayed 
rows Mr. Kirkland writes: * some blight was in evidence, but at 
no time was the attack virulent. Over the greater portion of the 
rows not much difference [between sprayed: and unsprayed] was 
noticeable until after August 20; then the contrast was plainly dis- 
cernible, but at no time was the contrast in appearance as sharply 
drawn as in 1905.” ‘There was no rot anywhere in the field. 
The items of expense for spraying 5 acres 6 times were as 
follows: 
3007 Ibs: copper sulphaté @ GI4E. i.e Ai ce bebe oe ame tee ee $19.50 
23) Ibs. paris green, @ 256". s/s a pee ble «oso niet Sys 
Freight Ot. ADOVE ' << 4 a/ace.» ja. « stele a (055 wialedealemnigh spouse enemies an sae aaa .28 
DOTS iss lela le'a fe nve, of a TaSeue fw laltwr'w wl or ailgiea les She he: Rds al it tet eta a ake FO ore 
s: brs. labor for man ‘(@ 12}4¢e0. £2. 1b5. asa. Ve eh, Wie oy neal ne 6.38 
si Hrs, labor for horse @ ?10¢! \h3..0k 245 4) = ee 8 ied 5.10 
Total hee als cee ok Sei ny SE ahs tee hata 4) Rae a Se $38.11 
Four rows were left unsprayed and the gain due to spraying was 
determined by comparing the yield of one of the middle unsprayed 
rows with the second sprayed row on one side. 
Experiment No. 12.— The total expense of spraying 13 acres six 
times,— labor, chemicals and allowance for wear of sprayer,— was 
$68.02. The unsprayed rows died about three weeks before the 
rest of the field. Mr. Doolittle states that in his neighborhood blight 
affected some fields more than others and that some of his neigh- 
bors, judging by the greenness of their own fields, doubted that 
spraying had been profitable for him. However, the test rows 
show that it was highly profitable. The yields were as follows: 
Sprayed row, 530 Ibs. = 256 bu. 31 lbs. per acre. 
Unsprayed row, 350 lbs. = 169 bu. 24 Ibs. per acre. 
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