40 



BULLETIN 173, U. S. DEPARTMENT OF AGRICULTURE. 



Table VIII- 



-Gomparative percentage of eggs deposited in fruit stems and leaf shins of 

 French prunes, San Jose, Cal., season of 1910. 



Xo. of ob- 



Number 

 of eggs in 

 leaf stems. 



Number 

 of eggs in 



No. of ob- 



Number 

 of eggs in 

 leafstems. 



Number 

 of eggs in 



servation. 



fruit 

 stems. 



servation. 



fruit 

 stems. 



1 



2 



7 



44 



1 



12 



2 



1 



10 



45 







11 



3 



5 



5 



46 



7 



8 



4 







12 



47 



3 



8 



5 



2 



13 



48 



7 



9 



6 



1 



6 



49 



5 



11 



7 



3 



8 



50 



2 



9 



8 







8 



51 



12 



9 



9 







8 



52 



10 



11 



10 



1 



9 



53 



2 



9 



11 



1 



8 



54 



3 



10 



12 



2 



10 



55 



7 



12 



13 



2 



4 



56 







6 



14 



5 



6 



57 



9 



10 



15 



3 



10 



58 



5 



10 



16 



2 



11 



59 



12 



4 



17 







5 



60 



5 



11 



18 



3 



12 



61 







17 



19 



3 



10 



62 



6 



9 



20 



1 



S 



63 



2 



13 



21 







6 



64 



4 



9 



22 







3 



65 



5 



12 



23 



3 



10 



66 



8 



6 



24 



1 



9 



67 







7 



25 



1 



5 



68 



11 



8 



26 



2 



13 



69 



8 



9 



27 



1 



10 



70 



5 



16 



28 



1 



5 



71 



9 



7 



29 



1 



9 



72 



3 



8 



30 



2 



8 



73 



2 



9 



31 







16 



74 



2 



7 



32 



2 



8 



75 



9 



11 



33 



2 



4 



76 



17 



8 



34 



1 



15 



77 



6 



10 



35 







9 



78 



11 



4 



36 







11 



79 



12 



8 



37 



1 



7 



80 



9 



14 



38 



4 



19 



81 



8 



9 



39 



7 



16 



82 



2 



S 



40 



2 



13 



83 



1 



11 



41 



5 



7 



84 







11 



42 

 43 



3 

 3 



12 

 9 









Total... 



299 



786 



It will be seen from this table that the average number of eggs 

 placed within fruit stems of prunes is more than twice the number 

 placed in the leaf stems. In pears a very large proportion of eggs is 

 placed in ribs and veins of leaves and a comparatively smaller per- 

 centage in the fruit stems. 



FIRST EGGS. 



The first eggs that were noticed in the vicinity of San Jose and in 

 Contra Costa County were placed about March 10 for the season of 

 1909, while most eggs were being placed about March 15 to 25, and 

 the last eggs in early April. The first eggs were deposited in 1910 in 

 the field about March 9, while maximum oviposition was from March 

 18 until about April 2. The last eggs were observed to be placed in 

 the field toward the middle of April. In the interior counties, espe- 

 cially Sacramento and Solano Counties, eggs were being deposited in 

 large numbers by March 15, and continued to be deposited in num- 

 bers until the latter part of March, a few being found in early April. 



