New York AGRICULTURAL EXPERIMENT STATION, 143 
ditions in this experiment were unusual. The sprayer failing to 
arrive from the factory as soon as was expected, bugs became very 
numerous in both fields before any spraying could be done. The 
first spraying was made July 7 with bordeaux and paris green. A 
second spraying was made on July 11. These two applications 
checked the bugs so effectually that the sprayed rows required nc 
more poison during the remainder of the season. But on the un- 
sprayed rows it was different. Although in both fields the un- 
sprayed rows, also, were treated with paris green on July 7 and 11, 
by means of a powder gun, the bugs continued their depredations ; 
and even by three additional applications of paris green (once with 
a powder gun and twice with a hand sprayer) the bugs were only 
partially controlled. In spite of all that could be done the un- 
sprayed rows in both fields were ruined by bugs. Most of the 
damage was done by mature beetles which bit off the leaf stalks 
to such an extent that the ground was covered with the fallen leaves. 
Mr. Hyde is of the opinion that spraying drove the beetles to the 
unsprayed rows causing these rows to be more severely attacked 
than they would have been had no spraying been done. Such may 
have been the case. Our personal observations were too few to 
enable us to express a positive opinion on the subject. Whatever 
the true explanation, the fact stands out prominently that two ap- 
plications of paris green with bordeaux gave full protection against 
bugs where five applications by ordinary methods utterly failed. 
Neither early blight nor flea beetles were important factors in 
this experiment. Late blight probably hastened the death of the 
unsprayed rows, particularly in Field No. 2; but most of the injury 
was due to bugs. 
Because of the uncertainty as to what part of the gain in this 
experiment should be credited to spraying, the results have not 
been used in making up the averages on page 161. Had this ex- 
periment been included, the average gain due to spraying in the 
business experiments would have been 5514 bushels per acre. Mr. 
Hyde is satisfied that the spraying was highly profitable. He be- 
lieves that it doubled his yield. 
THE CASSVILLE EXPERIMENT. 
This experiment was conducted by P. S. Doolittle, Cassville, 
Oneida county. Eleven acres of potatoes, variety Carman No. 3. 
