REPORT OF THE STATE ENTOMOLOGIST I915 45 



that it is impractical to control this psst or that failure to do so is 

 due to carelessness in individual applications. We are also unable 

 to see the necessity of making a later application, say the latter 

 part of June, for the purpose of destroying the late-hatching cater- 

 pillars though a spraying at that time would probably help more in 

 controlling the codling moth than a treatment given two or three 

 weeks after blossoming. There is a practical difficulty in attem.pting 

 to destroy these late-hatching individuals by spraying at about the 

 time they are entering the fruit, because the apples are then growing 

 rapidly and observations have shown that the period of entry may 

 extend over two or three weeks, makirig it almost impossible to 

 keep the expanding surface of the young fruit well covered with a 

 poison. 



OVIPOSITION AND EVENING TEMPERATURES 



Side injury has been so marked in certain apple regions in the 

 western part of the State that Mr L. F. Strickland, horticultural 

 inspector stationed at Lockport, made records concerning oviposit ion 

 and injuries caused by the young larvae. 



These records we have compared with a series of evening tem- 

 peratures calculated from m.inim.um tem.peratures of Chatham., 

 Wappingers Falls and Appleton, published by the United States 

 Weather Bureau Service and corrected by adding thereto the differ- 

 ence between the minimum tem.peratures for the localities given 

 and the mean hourly tem.peratures for Albany and Rochester based 

 on a five-year record, 1891-95, kindly calculated and placed at our 

 disposal through the courtesy of Dr P. C. Day, chief of the United 

 States weather bureau. The Albany data were used for the cor- 

 rection of the Chatham and Wappingers Falls temperatures and the 

 Rochester data for the Appleton records, the difference between the 

 m.ean minimiim of this period for June and July and the mean tem- 

 perature at 8 p.m. being added to the recorded minim.a, this cor- 

 rection amounting for June and July for Chatham and Wappingers 

 Falls, to 8° and 9° respectively, while for Appleton the difference 

 was 9° and 10° respectively. 



July 2, 19 12 Mr Strickland records that codling 2n.oth larvae were 

 entering the sides of apples in Mr John Garbott's orchard at John- 

 sons Creek, adding that almost every apple was entered at the 

 side and that it was by no m.eans necessary for another apple or 

 leaf to touch. At that time very few unhatched eggs were observed, 

 and on referring to the corrected evening records for Appleton, we 

 find that the thermom.eter reached 60° or over on the 15th to the 

 17th, on the 20th and 21st, and from the 24th onward there was a 



