REPORT OF THE STATE ENTOMOLOGIST I918 23 



Through the kindly cooperation of George W. Mead of Barker and 

 E. E. Crosby of Lockport, temperature records were kept through 

 most of June and July. The two localities were selected for the 

 purpose of ascertaining what differences might exist between the 

 Barker orchard located about 2 miles from Lake Ontario and at an 

 elevation 200 feet high, and the Lockport orchard some 14 miles 

 from the lake and with an elevation of approximately 600 feet, this 

 latter being on the Erie plain. The cool breezes of midsummer are 

 very evident near the lake and less apparent in the vicinity of Lock- 

 port. The temperature records were made at 8 and 9 p. m. (daylight 

 saving time) or 7 and 8 p. m., sun time. The latter record is the 

 most significant so far as codling moth activities are concerned. It 

 will be noted on referring to these records that the thermometer at 

 9 p. m. did not reach 60 degrees F. or higher until the 24th, rising 

 the last of the month to 70 degrees. It is interesting to note in this 

 connection that field observations resulted in finding eggs in orchards 

 June 2 7th for the first time and a markedly greater abundance of 

 eggs July ist, the latter almost exactly coinciding with the decidedly 

 higher evening temperatures. Again there was an increased ovi- 

 position July 12th which, on referring to the temperature records, 

 will be found to follow a series of decidedly higher evening tempera- 

 tures, and this was even more marked on July i6th and i8th. 



The temperature and oviposition records given below justify the 

 statement that codling moths will not lay many eggs when the early 

 evening temperatures, namely 8 p. m. sun time, are below 60 degrees 

 and a rise to this point or above is very apt to be followed by the 

 deposition of large nvmibers of eggs, specially in orchards badly 

 infested by this pest. It is not difficult to corroborate this general 

 statement by finding the tiny, glistening, semitransparent or whitish 

 specklike eggs with a diameter a little less than the head of an 

 average pin upon the leaves, and particularly the smooth surface 

 of the fruit. The period of most active egg laying in the western 

 part of the State comes in early July, very likely the first week, 

 though sometimes it may be delayed until the second or even the 

 beginning of the third week. 



