PART II: MANAGEMENT OF TYPICAL WOODLOTS 

 INFESTED WITH THE GIPSY MOTH IN THE WHITE- 

 PINE REGION. 



By Willis Muneo, 



Assistant in Forest Management. 



CONTENTS. 



Page. 

 Susceptibility to gipsy-moth attack as a basis 



of management 17 



Other factors in management for moth con- 

 trol 18 



Some controlling factors in management 18 



Trees which control 19 



Typical stands 28 



Mixed oaks, four-tenths white oak, at 



Dover, Mass 28 



Mixed oaks, three-tenths white oak, at 



Exeter, N. H 33 



Typical stands — Continued. 



Mixed oaks, two-tenths white oak, at 



Wareham, Mass 



Mixed hardwoods, one-tenth white oak, 



at Medfield, Mass 



Old field growth, one-twentieth white oak, 



at Amesbury , Mass 



Northern hardwoods, no white oak, at 



North Berwick, Me 



Conclusions 



Appendix 



Page. 



35 



The preceding pages have been devoted to the general subject of 

 the gipsy moth in woods. In those which follow an attempt will be 

 made to coordinate the results of the food-plant experiments with 

 known principles of forest management and with economic condi- 

 tions in the infested region, to see how far we may reasonably expect 

 to rely upon forest management to control the moth. 



SUSCEPTIBILITY TO GIPSY-MOTH ATTACK AS A BASIS OF 

 MANAGEMENT. 



TYPICAL STANDS COMPARED. 



The composition of some of the statnds used in the management 

 experiments was shown in Part I (p. 6). By taking these same 

 stands and grouping the species according to their susceptibility to 

 attack by the gipsy moth, as determined by Mosher 1 we get the fol- 

 lowing results: 



Composition of stands by percentage of susceptible trees present. 



Classes of trees based on acceptability as 

 food for gipsy-moth caterpillars. 



Dover, 



Mass. 



Exeter, 

 N. a. 



Ware- 

 ham, 



Mass. 



North 



Berwick, 



Me. 



Ames- 

 bury, 



Mas's. 



Med- 

 field, 

 Mass. 



I. Favored food in all larval stages 



II. Favored food after earlier stages 



Per cent. 



94 



3 



2 



1 



Per cent. 



88 



4 



8 



Per cent. 



83 



16 



1 



Per cent. 

 50 



4 

 45 



1 



Per cent. 



45 



36 



12 



7 



Per cent. 



38 



61 



1 

















100 



100 



100 



100 



100 



100 









510 



4.9 



S 



291 



6.1 



15 



306 



7.0 



9 



407 



6.5 



14 



321 



4.9 



19 



426 



Average diameter breast high in inches 



6.6 

 6 







1 Food Plants of the Gipsy Moth in America, F. II. Mosher, Bulletin 250, U .S. Dept. of 

 Agriculture, 1915. 



64360°— Bull. 4S1— 17 3 17 



