REPORT OF THE STATE ENTOMOLOGIST 19IO 21 



nection with the bordeaux mixture. This latter consisted approxi- 

 mately of eight pounds of copper sulfate with enough lime to 

 satisfy the copper, to 150 gallons. 



The day was lowery with an occasional sprinkling of rain, but 

 at no time did enough water fall to materially affect the work. 

 The pressure was uniformly maintained at 85 to 100 pounds, a one 

 horse gasolene engine supplying the power. Friend nozzles were' 

 employed, set at an angle and on the end of long extension nozzles, 

 one man standing in a wagon, thus being able to throw the spray 

 down upon even the highest blossoms. The actual experimental 

 trees and the barriers separating them were Baldwins, while the 

 two rows of barrier trees on the northwest were Wagners, and the 

 same was true of the first barrier row on the southeast, the second 

 being Baldwins. The blossoms had just dropped from the trees 

 and the time of application was therefore nearly ideal. 



Plot 2 was sprayed a second time June ist and plot 3 for the first 

 time on the same date. The day was cloudy with an occasional 

 mistiness which did not interfere with the work, as there was not 

 at any time enough moisture to wet the foliage. Six pounds of 

 arsenate of lead (15 per cent arsenic oxide) was used to each 50 

 gallons of water and approximately the same formula as given above 

 for the bordeaux mixture. 375 gallons of spray were applied to 

 the 85 trees, it being sufficient to cause dripping in almost every 

 instance. There was at this time no evidence of codling moth work, 

 aside from possibly one apple which may have been entered at the 

 side. Larvae of the green-striped apple worm, Xylina anten- 

 na t a Walk, and also those of a Tortricid, w^ere rather abundant. 

 The latter hid betw^een the leaves and ate them as well as contiguous 

 fruit. Apples were picked up under the experimental trees and 

 classified August 24th, September 13th and October 4th-5th. 



An examination of this orchard June 30th showed that the con- 

 ditions were not so satisfactory as at Arlington. There was con- 

 siderable bordeaux injury, especially on the plots receiving the 

 early application. The poison was very evident on all "the experi- 

 mental trees. Those of plot 3, sprayed only en June ist, showed 

 less bordeaux injury than the others. The fruitage on some of the 

 trees was disappointing, since many of the blossoms failed to set. 

 Work of the Tortricid leaf roller, mentioned above, and the green 

 fruit worm was quite evident. 



