104 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
was applied to the adjacent sprayed rows with the bordeaux 
mixture in the first two sprayings. Messrs. Van Sise were of 
the opinion that the paris green was more effective where used 
with’ water than where used with bordeaux. The writers did 
not see the experiment at the time when this point could be 
determined, but from observations on numerous other experi- 
ments we have reached a directly opposite conclusion. 
On July 17 a thorough examination was made of both fields. In 
the smaller field the plants almost completely covered the ground 
and were looking well. They were thoroughly covered with bor- 
deaux showing that the spraying of July 14 had been well done. 
It was evident that “ bugs” had done no damage to the unsprayed 
rows. There was no early blight whatever and only a trace of late 
blight. In walking the entire length of the unsprayed rows only 
four leaves affected with late blight could be found. Flea beetles 
were very numerous and were just beginning to injure the plants. 
They had injured the unsprayed rows slightly more than the sprayed 
ones, but this was the only observable difference between the 
sprayed and unsprayed rows at this time. 
In the larger field the vines did not yet cover the ground. The 
sprayed and unsprayed rows were practically alike in general ap- 
pearance. Both had been considerably injured by flea beetles which 
were very numerous. On the unsprayed rows there was a little 
early blight and a little late blight. Twenty-five leaves affected with 
the latter disease were found. The sprayed rows were entirely 
free from both diseases. No damage had been done by “ bugs.” 
Subsequently, there was much damage. done by flea beetles and 
considerable by late blight in both fields. We are of the opinion 
that a fourth spraying made about July 25 would have largely in- 
creased the net profit in this experiment, but the owners were unable 
to make it owing to the pressure of other work. 
The items of expense for spraying 8.75 acres three times were 
as follows: , 
174 lbs./copper ‘sulphate. @°6'4F: .\...'. Lue ene. sc ee hae ale $11.31 
PRBS 5 PLA ee treanetans aie on hes Se leet dee LI 2 iit ieee 1.35 
25 vilbs.! paris ereem @i25¢ bees « Baw shee cd chee seed cle Ve 7.00 
29 thrs.labor: for man andshorse@ 306 wie!) <b) es ype eee 8.70 
209 hrsz labor, for).extra:man @nis¢s s,s ors eee 3.00 
Wear of sprayers! iia Wel eka bt acs (lel 3 Gti «ye 2.25 
