U. S. DEPARTMENT OF AGRICULTURE BULLETIN NO. 484. 



Complexity and variable composition of woods in the area infested by the 



gipsy moth. 



1 acre in Dover, Mass. Mixed 

 hardwoods. 



5.4 acres in Wareham, Mass. 

 Mixed hardwoods— Con. 



3.4 acres in North Berwick, Me. 

 Northern hardwoods. 



Species: 

 Red oak 



Per cent. 



45 

 38 

 11 

 3 



(>) 



(') 



(') 



( l ) 



S pecies — Cont inucd . 



G ray birch 



Black gum 



Per cent. 

 ft 



Species: 



Per cent. 

 45 





Hop hornbeam 



Sugar maple 



Red maple 



Black birch 



Hemlock 



16 





14 





100 



8 



Red maple 



4 





1.3 acres in Medfield, Mass. 

 Mixed hardwoods. 



4 



Pignut hickory 



Yellow birch 



3 

 2 



Paper birch 







100 







Species: 



Per cent. 

 52 

 21 

 10 

 9 

 7 

 1 



1 





Big-tooth poplar. . 



(') 



1 



0) 



21 acres in Exeter, N. H. Mixed 

 hardwoods. 





American elm 



White oak 



White pine 



(') 







100 



Species: 



Per cent 

 31 

 30 

 26 

 7 

 4 

 (J) 

 (') 



('; 

 (') 

 0) 



(») 

 (') 

 (') 

 (') 

 <■) 



Red maple 









100 







11 acres in Westbrook, Me* 





White pine and mixed hard- 





4.2 acres in Amesbury, Mass. 

 White pine and mixed hard- 

 woods (old-field growth). 



woods. 



White pine 





Pignut hickory, 

 Black birch 



Species: 



Per cent. 



Species: 



White pine 



Gray birch 



Per cent. 



28 



21 



16 



10 



8 



5 



5 



2 



1 



© 



1 



0) 

 (') 



(•) 

 (') 



a 



23 







Pitch pine 



Yellow birch 



Aspen 



Gray birch 



Red maple 



20 

 16 

 7 

 3 

 2 



Black cherry 



Elm (American)... 



Red maple 



Pitch pine 



White oak 



Red cedar 



Paper birch 



Shagbark hickory. 

 Balsam fir 









100 





1 





White ash 



Big-tooth poplar . . 



Choke cherry 



Hop hornbeam 



1 





Swamp white oak. 



1 





1 



5.4 acres in Wareham, Mass. 





(*) 



Mixed hardwoods. 



Black birch 



Pignut hickory 





w 





Black oak 



(') 





Per cent. 



54 



21 



15 



8 



1 



(') 



(') 



Sugar maple 



(1) 



Species: 



Scarlet oak 





(1) 



Wild red cherry... 

 American elm 

 Hop hornbeam 







100 



White pine 

















100 





Red maple 





1 Less than 1 per cent. 



The physical condition of the., trees composing the woods in the 

 infested region is extremely poor, due largely to the action of re- 

 peated fires which destroy the litter and decomposed vegetable mat- 

 ter so essential to successful tree growth. Fire is also responsible 

 for physical injury to trees and the admission through fire wounds of 

 injurious fungi and insect borers. A very high percentage of the 

 deciduous trees in the infested region is of sprout origin. The stools 

 from which these have sprung are often worn out and more or less 

 decayed, and from such impaired stock it is unreasonable to expect 

 successful tree growth. 



Owing to poor physical condition, small size, and limited propor- 

 tion of desirable species, the woods of the infested region are of rela- 

 tively low commercial value. Under present conditions a large 



