THE LEGUME POD MOTH. 



99 



Table II. — Mean 'percentage of damage done by the legume pod moth to all plats in full 



bloom on a given date in the season of 1910. 



Date of full bloom. 



June 16 

 June 17 

 June 21 

 June 23 

 June 24 

 June 25 

 June 26 

 June 2S 

 June 30 



Mean 





per cent 



Number 



of seed 



of plats. 



damaged. 





0.1 



1 



.1 



2 



.0 



3 



.1 



3 



.3 



2 



.0 



1 



.4 



6 



.3 



1 



1.0 



6 



Date of full bloom. 



July 1 . 

 July 3. 

 July 6. 

 July 9. 

 July 12 

 July 14 

 July 17 

 Julv 24 



Mean 



per cent 



of seed 



damaged. 



0.2 

 2.1 

 1.1 

 2.5 

 2.3 

 5.1 

 1.1 

 1.3 



Number 

 of plats. 



/ 



2 



15 



8 

 1 

 2 

 1 

 1 



? O 



CO 



s.o 



+.0 



JO 



z.o 



/.o 



<s3 



v. 



^ 



\ 



^ 



CM 



C\l 





<b 







X 



^ 



^ 





# 



S 



^ 



v, 



^3 



<M 



^3 



.Fig. 36. — Diagram showing maximum and minimum damage done by the legume pod moth to varieties 

 of peas in full bloom on a given date in 1910. (Original.) 



EXPERIMENTAL WORK CARRIED ON DURING THE SEASON OF 1911. 



Sixty-seven varieties of field peas were planted in 1911 on the 

 farm of the State College at Pullman, Wash. The field selected was 

 in a draw, or ravine, bordered on three sides by grain fields and on 



