THE GRAPE PHYLLOXERA IN CALIFORNIA. 



61 



Table XIII. — Incubation and development of radicicole of the grape phylloxera 

 on living vines, Walnut Creek, Calif., 1913-1915 — Continued. 



SECOND GENERATION, 1913. 



Date egg 

 deposited 



Date egg 

 hatched. 



Incuba- 

 tion 

 period. 



Date 



insect 



matured. 



Growing 

 period. 



Total 

 period of 

 develop- 

 ment. 



Variety of vine and 

 number of cage. 



temper- 

 ature. 



Days. 



Days. 



Days. 



June 10 

 June 11 

 June 12 



...do 



June 30 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 

 July 1 

 ...do.... 

 ...do.... 

 June 30 

 June 26 

 ...do.... 

 ...do.... 

 ...do.... 



...do 



...do.... 

 ...do.... 

 June 27 

 ...do.... 

 June 30 

 ...do.... 

 ...do.... 

 ...do.... 

 July 1 

 ...do.... 

 July 2 

 ...do.... 



June 20 

 June 19 



...do.... 

 June 20 

 July 6 

 July 8 



...do 



...do.... 



...do.... 

 July 9 



...do.... 



...do.... 



...do.... 



...do.... 



...do.... 



...do.... 

 July 3 

 July 4 



...do.... 



...do.... 



...do.... 

 July 5 



...do.... 

 July 4 

 July 5 



...do.... 

 July 6 

 July 7 



...do.... 

 July 8 



...do.... 



...do.... 

 July 10 



July 8 



...do... 



...do... 

 July 11 

 July 20 

 July 22 

 July 23 



...do... 

 July 31 

 July 24 

 July 25 

 July 31 

 Aug. 4 

 Aug. 7 

 Aug. 11 

 Aug. 8 

 July 21 

 July 25 

 July 26 



...do... 

 July 28 

 July 29 

 July 31 

 July 28 

 July 31 

 Aug. 8 

 Aug. 10 

 Aug. 12 



...do... 



...do... 

 Aug. 13 

 Aug. 14 

 Aug. 18 



Mission VII. 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



Burger VI. 



do 



do 



do 



do 



do 



do 



do 



do 



Burger V . . 



do 



do 



do 



do 



do 



do 



do 



68 

 68 

 69 

 70 

 70 

 70 

 70 

 71 

 70 

 7n 

 71 

 71 

 71 

 71 

 71 

 70 

 70 

 70 

 70 

 70 

 70 

 70 

 70 

 70 

 71 

 71 

 71 

 71 

 71 

 71 

 71 

 71 



THIRD GENERATION, 1913. 



July 23 

 July 28 

 July 29 



...do 



...do 



July 31 

 Aug. 5 

 Aug. 7 

 ..do.... 

 Aug. 8 



Aug. 25 

 Aug. 28 

 Aug. 30 

 Sept. 1 

 Sept. 3 



Thompson's Seedless I. 



Muscat IV 



do.. 



do 



do 



FOURTH GENERATION, 1913-14. 



1 



Aug. 26 

 Sept. 1 



...do.... 



Sept. 3 



Sept. 8 

 Sept. 9 

 Sept. 10 

 Sept. 23 



8 

 7 

 8 

 9 



( 2 ) 



Sept. 18 

 Sept. 22 

 Sept. 30 

 Apr. 6 

 Apr. 9 

 Oct. 24 

 Apr. 6 

 Apr. 7 

 May 20 

 Apr. 15 

 Apr. 24 

 Apr. 28 







Thompson's Seedless I . . 



3 71 



2 



10 

 13 

 20 

 195 

 198 

 30 

 194 

 195 

 238 

 203 

 211 

 215 



17 

 21 

 29 



70 



3 



..do 



69 



4 



....do 



69 



5 



Muscat IV 





6 









do 





7 





Sept. 24 

 ...do 







....do 



66 



8 









....do 





9 





...do 







..do 





10 





...do 







....do 





11 





...do 







....do 





12 





Sept. 25 







....do 





13 









....do 



















FIFTH GENERATION, 1914. 



1 



Apr. 25 

 Apr. 26 

 ...do 



May 9 

 ...do 

 ...do 



14 

 13 

 13 

 12 

 12 

 11 

 11 



May 28 



...do 

 June 2 

 June 1 

 June 2 



...do 



June 3 



19 

 19 

 24 

 23 

 24 

 24 

 25 



33 

 32 

 37 

 35 

 36 

 35 

 36 



Muscat IV 



62 



2 



do 



62 



3 



....do 



63 



4 



Apr. 27 

 ...do 



...do 

 ...do 



. ..do 



63 



5 



..do 



63 



6 



7 



Apr. 28 

 ...do 



...do 



...do 



do 



....do 



63 



63 













J Indicates winged migrants. 2 Hibernant. 3 Indicates average temperature of incubation period alone. 



