LARCH MISTLETOE. 



23 



part of the tree and are very frequently more than 10 feet in length. 

 Streaks of discolored wood, usually pitchy, and long checks may often 

 extend from burl to burl, producing a very poor grade of lumber. 

 Table IV shows the quantity of culls resulting from the mistletoe 



burls. 



Table IV. — Culled larch lumber resulting from mistletoe burls. 





Tree No. 



Trunk burls. 



Basal branch burls. 



Age 



of 



tree. 



Burl 

 No. 



Average diam- 

 eter. 



Length. 



Volume, b. m., 



of culls due to 



burls. 



Maxi- 

 mum 

 diam- 

 eter.a 



Num- 

 ber. 



Volume, b.m., 



of culls due to 



burls. 





At 

 base. 



At 

 top. 



Each. 



For 

 tree. 



Each. 



For 

 tree. 



years. 



6 



{ i 



{! 



i 

 i 

 i 

 i 



Inches. 

 6.6 

 3.5 



Inches. 

 6.1 

 3 



Feet. 



Feet. 



Feet. 



Inches. 

 7.0 

 3.5 





Feet. 



Feet. 









m 





1.4 







43 





96 







20 



100 



7 



8 



12.3 

 11.5 

 10.1 

 15.1 



8.1 

 13.5 



8.6 



12 

 11 

 10 

 14.8 



7 

 12.7 



8.3 



1.5 

 1.2 



1 

 3 

 9 

 3 

 2 



12 

 9.3 

 5.5 



25 



14.5 



20 

 8 



I 26.8 



25 



14.5 



20 



8 



( 12.3 

 \ 11.5 

 I 10.1 



15.1 

 9 



13.5 



16 



3 



> 28.2 



105 



1 

 1 



8 



2 



3 



5 



1.4 



2.5 

 1.4 



20 

 5 



10 



30 



J 



27.5 



106 



10 



15.9 



]99 



123 



25 



40 

 13 



128 



13 



10 





3c 



!! 



12 

 11.6 



11.4 

 10.8 



11.8 

 11.5 

 11.3 

 10.6 



2.3 



2 

 2 

 2 



15 

 10 



6.5 



6 



1 37.5 



f 12 

 1 11.6 



1 11.4 



I 10.8 















23 





ISO 



12 

 6 

 12 



30 

 180 

 175 

 170 



J 

 180 



183 



31 



l 

 l 

 l 



{ I 



23.2 

 13.1 

 18.5 

 18.1 



17.7 



23 



13 



18 



17.9 



17.5 



3 



3.5 

 4 

 16 

 2 



70 

 25 

 67.5 

 190 

 22 



(d) 

 } 212 



23.2 

 15.5 

 18.5 



/ 20 



I 18 



245 



205 



15 



195 



216 



16 



67.5 



222 



17 



5 



5 

 4 



12 

 9 



11 

 5 

 6 

 5 

 4 

 7 



21 



10 

 6 

 3 



80 

 80 

 30 

 20 

 140 

 190 

 150 

 60 

 80 

 70 

 60 

 75 

 190 

 110 

 95 

 120 



| 292 

 30 



224 



36 



225 



20 



l 

 l 



13.1 



12.8 



13 

 12.3 



2.5 

 4 



20 

 25 





13.5 



12.8 



40 



226 



35 



165 



227 



33 



190 



229 

 233 



28 



34 



l 



IS 



17.8 



7 



110 





18 



260 

 60 



235 



18 

















80 



245 



30 

















70 



245 



37 

















60 



248 



32 



l 



10.9 





16 



70 





12 



145 



240 



2 



190 



249 



12 

















110 



252 



3S 

















95 



253 



2) 



l 



18 



17.8 



16 



210 



(0 



19 



330 



a Average diameter taken between middle line of burl and either extremity. 

 b Tree culled. 



c See figure 8. 

 d See figure 10. 

 « Bee figure 9. 



METHOD OF CONTROL. 



Since mistletoe is propagated and spreads from tree to tree by 

 means of seeds, the method to be employed in eradicating it is similar 

 to that which is now being adopted in many sales areas for reducing 

 the ravages of forest-tree fungi. Results will be obtained in a much 

 shorter t.i tie, however, than in the case of fungous enemies. Mistle- 

 toe occupies only the aerial part of the host. Fungi attack all parts 

 roots, -tiiii-. and leaves; hence, cutting an infected tree docs not 



