CONTROL OF GIPSY MOTH BY FOREST MANAGEMENT. 



31 



The Class III trees (not particularly favored food) will also be 

 favored in the first cutting. On this lot these were only a few red 

 maple and pignut hickory. 



The Class IV trees (unfavored food) will not be cut, even if de- 

 fective or suppressed. On this lot they were white ash. 



In a stand as dense as this (500 trees per acre) about 60 per cent 

 of the total number present should be removed. The result upon the 

 actual stand now under consideration, of following either of the two 

 plans of cutting proposed, appears clearly in the following table : 



Stand and cutting table, Dover, Mass. Mixed oak stand, four-tenths white oalc. 





Original stand. 



Number per acre left under 

 two plans proposed. 



Trees which control if in sufficient 

 numbers. 



Trees which 



control on 



this lot. 



Other spe- 

 cies present. 



Number 

 per acre. 



1. Radical 

 conver- 

 sion — one 

 cutting 

 (now). 



2. Gradual conver- 

 sion — successive 

 cuttings. 





First 

 (now). 



Second 



(in 5 to 10 



years). 



Class I: 







229 



59 



193 



1 



17 



5 

 3 



3 





130 

 36 



28 





























Gray birch.. 



White pine. . 



Red maple.. 

 Hickory 



White ash... 







Class II: 



White pine 





17 



17 



2 

 2 



3 



17 



Class III: 



Red maple 





2 









2 



Class IV: 





3 













510 



17 



220 



24 



The lot should be planted at once with some moth-resistant species. 

 Red or white pine, or a mixture of both, may be used, 1,000 to the 

 acre, with entire confidence. 



The site as a whole is too dry for white ash, but a few, 25 or 50, 

 could be planted at the lowest part of the lot with benefit to its 

 eventual moth-resistant character. 



Cleanings will be necessary for at least five years, as in the case 

 of clear cutting. (See p. 29.) ' 



The second cutting should be made just as soon as the trees planted 

 are established and have gained a decisive lead over the sprouts from 

 stumps of trees cut. This would be not less than five years after the 

 first cutting. If it were delayed until 10 years after, the planted 

 trees would probably be secure against being overtopped by sprouts 

 from the second cutting. If cut after five years, a cleaning in the 

 second and another in the fourth year would probably be necessary. 

 The second cutting should remove all remaining Class I trees of the 



