178 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
Throughout the season there was no apparent difference in the 
appearance of the foliage on the rows sprayed with bordeaux only 
and that on the rows sprayed with bordeaux and paris green. ‘There 
was no indication that the paris green in the bordeaux was injurious 
to the foliage. The check rows receiving paris green in lime water 
blighted considerably and died somewhat prematurely, but there was 
no evidence that the foliage was injured by paris green. 
The potatoes in this experiment were dug by hand October 26. 
The yields are shown in the following table: 
TABLE XIV.—SHOWING YIELDS IN Paris GREEN EXPERIMENT. 

YIELD OF FIVE YIELD PER ACRE. 
ROWS. 
TREATMENT. | Rows. — 
tage = Small. | Market able.| Small 
Lbs. Woke | exh lbs. | Bu. Ibs. 
Bordeaux with paris green..| 1, 2, 7, 10, 13. 579 84 | 325 53 | 19 8 
Bordeauxtonly..5 ci wsisn = tee 2 65S te l4 570 37 | 320 49 | 20 49 
Paris green in lime water...| 3, 6,9, 12, 15. 378 44 | 212 45 | 24 45 
Difference in favor of bordeaux with paris green, 5 bu. 4 Ibs. per 
acre. 
The results of these experiments agree with the experience of 
potato growers who practice spraying. During the past four years 
the writers have been close observers of potato spraying and have 
seen no evidence that potatoes are in any way injured by paris 
green properly applied; viz., in moderate amount (one to two 
pounds per acre) with bordeaux mixture. 
In a former experiment it was shown that paris green has some 
value as a preventive of potato blight.2* With this fact in mind 
some potato growers have raised the question as to the advisability 
of using paris green with the bordeaux regularly. Our opinion is 
that it would not be profitable. Paris green should be added only 
when there are bugs or flea beetles to poison. 
* See Bulletin 267 of this Station, page 272. 
