104 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



Table XXXIX. — Band records taken from ten apple trees during 1908. 



No. of 



record. 



Date of 

 collect- 

 ing. 



Number 

 of larvae 



and 

 pupae. 



Number of 



emerging 



moths. 



1908. 



1909. 



1 

 2 

 3 

 4 

 5 

 6 



8 

 9 



10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 



July 18 



July 25 

 Aug. 1 

 Aug. 8 

 Aug. 14 

 Aug. 22 

 Aug. 29 

 Sept. 5 

 Sept. 12 

 Sept. 19 

 Sept. 27 

 Oct. 3 

 Oct. 12 

 Oct. 18 

 Oct. 26 

 Nov. 2 

 Nov. 9 



84 



121 



90 



54 



52 



20 



27 



102 



105 



101 



29 



85 



28 



10 



6 



2 



66 

 69 

 87 

 25 

 4 

 1 



1 



1 



13 

 27 

 33 

 38 

 14 

 25 

 43 

 92 

 56 

 26 

 50 

 20 

 7 

 2 

 1 





993 



252 



449 



Table XL.— Band records of 1908. Summary of Table XXXIX. 



Larvae from band collections. 



Transforming larvae of band collections 



Wintering larvae of band collections 



Relative proportion of first-brood larvae. . . 

 Relative proportion of second-brood larvae 



Transforming larvae of first brood 



Wintering larvae of first brood 



Parasitized, injured, and dead larvae 



Percent- 

 age. 



35.9 



64.1 



50 



50 



67.7 



32.3 



30.1 



WEATHER RECORDS FOR 1907, 1908, AND 1909. 



During the three seasons that the life history of the codling moth 

 has been studied in northwestern Pennsylvania (1907-1909) daily 

 records have been kept of the maximum and minimum temperatures, 

 together with other climatic conditions. In preparing the tempera- 

 ture curves shown in figures 28-30 use has also been made of the 

 weather records of the Weather Bureau made at Erie, Pa. 



The climatic conditions have been strikingly different during the 

 three seasons. The year 1907 was marked by an abnormally low 

 temperature, a late spring, and an earl}' fall with a rather high pre- 

 cipitation for the summer months. The month of May was the 

 coldest on record during a period of eighteen years. In 1908, on the 

 contrary, the spring was very early, the mean temperature was above 

 normal, and the summer was marked by two periods of severe 

 drought, the dry condition being especially felt during the latter 

 part of August. In most respects 1909 was considered normal. 



By comparing the daily fluctuations of temperature with the various 

 records showing the behavior of the codling moth it will be found 



