CONTROL OF GIPSY MOTH BY FOREST MANAGEMENT. 



21 



CONTROLLING TREES OF THE WHITE-PINE REGION AND THEIR CHIEF SILVICAL 



CHARACTERISTICS. 



CLASS I : SPECIES THAT AKE FAVORED FOOD OF THE GIPSY-MOTH LAEViE IN ALL THEIR 



STAGES. 



Aspen (Poptilus tremuloides Michx.). 



Aspen, Large-tooth (Populus grandidentata Michx.). 



Beech (Fagus atropunicea [Marsh.] Sudw.). 



Birch, Gray (Betula populifolia Marsh.). 



Oak, Scrub (Quercus pumila [Marsh.] Sudw.). 



Oak, Black (Quercus velutina Lam.). 



Oak, Red (Quercus rubra Linn.). 



Oak, Scarlet (Quercus coccinca Muench.). 



Oak, White (Quercus alba Linn.). 



CLASS II : SPECIES THAT ARE FAVORED FOOD OF THE GIPSY-MOTH LARVAE AFTER THE 



EARLIER LARVAL STAGES. 



Chestnut (Castanea dentata [Marsh.] Borkh.). 

 Hemlock (Tsuga canadensis [Linn.] Carr.). 

 Pine, Pitch (Pinus rigida Mill.). 

 Pine, White (Pinus strobus Linn.). 



CLASS III : SPECIES THAT ARE NOT PARTICULARLY FAVORED, BUT UPON WHICH A 

 SMALL PROPORTION OF THE GIPSY-MOTH ~LARV2£ MAY DEVELOP. 



Maple, Red (Acer rubrum. Linn.). 

 Maple, Sugar (Acer saecharum Marsh.). 



CLASS IV : SPECIES THAT ARE UNFAVORED FOOD OF THE GIPSY-MOTH LABV.E. 



Ash, White (Fraxinus americana Linn.). 

 Cedar, Red (Juniperus virginiana Linn.). 

 Cedar, White (Chamaeeyparis thyoides [Linn.] B. S. P.). 



Chief silvical characteristics of controlling trees of the tvhite-pine region. 



Gipsy- 

 moth 



1. Adaptability to 

 certain sites. 



2. Tolerance 

 of shade. 



Power of abundant reproduction — 





caterpillar 

 food 

 class. 



3. By seed. 



4. By sprouts or 

 by root suckers. 



5. Rapid growth. 



I.. 











Aspen. 



Aspen, Large 

 tooth. 





Aspen, Large tooth 





Aspen, Large tooth 



Aspen, Large tooth 

 Beech 





Beech 









Birch, Gray 



Birch, Gray 



Oak, Scrub 



Oak,Blaek 



Oak, Red 



Birch, Gray. 



































Oak, Scarlet 



Oak, White 















II 









Chestnut. 





















Pine, Pitch 









Pine, White 



Pine, White. 



Pine, White 





Pine, White. 



Ill 





Maple, Red 







Maple, Sugar 



Ash, White 



Maple, Sugar 







rv 



Ash, White 



Ash, White 



Ash, White. 



































