34 



BUELETIX 847, U. S. DEPARTMENT OF AGRICULTURE. 



























•a 



-e^i 









: — a 









~ 



^■a 





"S « . u 



■8 



- 1- f'Jfc 



3 



I 



- >>- >>§:-*£ 



3 -deS -dSgba* 



m 



3d o* g.3 o 6 dS £•=• | M - 

 c ££o SScBfigS-S 





fc c-S-ZI ^J fc^O 



w ^2 ^ -3 •PR 



1 ! 



o> i-5 ci O i-I tH CO ' t^ C: O N t> ^< 



NCXOM^O re BO o 



5050 i-H 



Total 

 num- 

 ber 

 of 

 borors 



in 

 check 

 trees. 



CMN~;XffiC:^NC<NJ 



j O»o to 



rH r-1 





_ 



t^ 



ooco : 



















u- to 



"3 





i-IW-* • 



















C3 























9 



1-1 



































c® 



"o 



£^£ : 



■ r~ ec 



■f 00 













a © 



c; 





<N -<J< 































I- o 





io >o cq ■ 



ia csi ta 



»N 













(5 © 



»H 



<M 



<N (N 



































2 » 





















3 P 















•* 



N^N^-^CN^ 



^i i-. 















Nih r-HrH ,-, 













(-r C3 



Ci 















c © 

































M 



t*i es 



CiOi 



Tjl 





DOHO 



to 



























z 



2 



















~ . m "S . 



NNSCCCNXMCJCf 



5S 0C t- 



Tola 



man 



ber 



of 



borer 



in 



treatc 



trees 





,a 



^. 



Ni-ICC ■ 











05 







x r~ 



o 























15 



© 



1 11* 



s 





















50 



-*<NOa : 



■ XH 



o«c 



















?5 ^ 















a 







































b"S 















































c c 













JO -3 





















fe ® 



OJ 



















s ^ 





















"c-rt 





















TH 



^fflHOHOUl 





Tj«0 













s 





















































O 00 



C<1 <N 



«aoc 



?C 00 





















z 



s 















a '£<- « s 



io»OTjieqeoeo-*r-<w«ocqiH 



-- 



Z^ >> = 







' r^' 





.,. . 



Sfe-i" 



^trtccC^T:-:^^?:^^:-: 



M <N DO 



= .5 c £ 3 











































































XT. 



a 



u 



c 



©T3.5 

 2 ® o 



• 

 « ; 



















1 = 





© 

 o 



ill! 



£2-2 : 



rj-aia ; 



| c3 







a 

 c 



- 



X 



9 



a 



9 

 P 

 P 



a 



a " 



3 -a 



o a 

 I- a 



■a ^ 



§§* i 



• O ■ 





a - «- a 

 — - — 



Hi § 



a 



s 



oo£o 



— i — C fc. 



'.si esi£:~ p,* 

 : « ^ * g -g p. £ 



e J 



o 3 t3 





© © a tx 



■S 03 O 







s 



£ 



C 



< 



3 x 



< 



g 



^ 



- 



P 



- 



* 



c 









