144 REPORT OF THE BOTANIST OF THD 
remained green until the middle of October, but observation 
showed that it was only the growth made between July 1 and 
August 10 that survived the attacks of the rust until October 
15; that is, a growth that was completed, hardened, and thor- 
oughly sprayed before the rust struck the bed. Al] the new 
sprouts which came up in the sprayed rows after the rust ap- 
peared in the field were destroyed. There were two and possibly 
three of these periods of late growth, namely, about August 15 
and September 15. As in tests of 1898, the asparagus foliage 
was not injured in the least by the resin-Bordeaux mixture. 
Tests in laboratory showed that the solution of copper sulphate 
could be neutralized by the use of the resin solution alone, but a 
mixture of resin soap resulted which would have been impossi- 
ble to spray. Possibly the excess of potash in the resin solu- 
tion was the neutralizing agent and not the resin itself. Which- 
ever it was, this is certain: that by first making the Bordeaux 
mixture with lime in the usual way, and then adding the stock 
resin solution at the rate of one gallon to twenty-four gallons 
of Bordeaux mixture, a fungicide was obtained which has not 
injured the asparagus foliage in the least during three seasons’ 
trials, namely, 1898, 1899 and 1900; furthermore, the resin solu- 
tion aids somewhat in making the mixture adhere to the smooth 
surface of the asparagus. | 
During 1900 the crop cut from all the rows of the test acre 
“was weighed as in 1899. As the fifteenth row showed a slight 
advantage in yield (about 18 pounds) over the other rows pre- 
vious to spraying, its yield is not included in the tables, although 
it was sprayed, hence the sprayed portion was two-fifths of 
an acre. 
RESULTS. 
The first cutting in 1900 was made May 14, and the last on 
July 2, the total number of cuttings being thirty-eight. This 
method gave us not only the yield of the sprayed rows before 
and after spraying, but also the yield of the adjoining unsprayed 
rows for two seasons. 
The prelimmary cuttings made in the season of 1899 brought 
