PART II: MANAGEMENT OF TYPICAL WOODLOTS 
‘-INFESTED WITH THE GIPSY MOTH IN THE WHITE- 
PINE REGION. 
By WILLIS MUNRO, 
Assistant in Forest Management. 
CONTENTS. 
Page. Page. 
Susceptibility to gipsy-moth attack as a basis Typical stands—Continued. 
Of Manage Menges seme eee aree ace atcliees = 17 Mixed oaks, two-tenths white oak, at 
Other factors in management for moth con- Wareham Masset saat ae ae 35 
LAZO) MSA aT NO gcse i By pe a 18 Mixed hardwoods, one-tenth white oak, 
Some controlling factors in management.... 18 at-Medfield sMasseeaenese can seeee ees 38 
Mreesiwhich:controleeseeser esate ee sees ee 19 Old field growth, one-twentieth white oak, 
MSV OICAT SCAMS erase eee ete eae erent Biel 28 AtVATES DUTY MASS seit ieee ye see eee 40 
Mixed oaks, four-tenths white oak, at Northern hardwoods, no white oak, at 
ID) OVCLS MASS Seale ANIC UNI NT ca USL 28 INorthy Berwick. Meese. sees aeeers 43 
Mixed oaks, three-tenths white oak, at Conclusions fia ase cee eee ee sen eee ere 48 
xe ter ING Heya gees See yee yey FHT oy os) OCG Lio ek Coa Mens Spe ce en Get SRE Nee sy ete ol 
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?! we get the fol- 
lowing results: 
Composition of stands by percentage of susceptible trees present. 
Ware- North Ames- Med- 
ham, | Berwick,| bury, field, 
Classes of trees based on UAteontanilite as | Dover, | Exeter, 
Mee Mass. Me. Mass. Mass. 
food for gipsy-moth caterpillars. Mass. 
Per cent. | Per cent. | Per cent. | Per cent. | Per cent. | Per cent. 
I. Favored food in all larval stages...... 94 88 83 50 45 38 
Il. Favored food after earlier stages.....- 3 4 16 4 36 61 
TII. Not particularly favored food.......-- 2 8 1 45 12 1 
IVE sUmiavored {ood eee eee asses see Tg rears Metros [eee aueei 1 Ug ie ase ce 
WWilkoleRStamdls) 205 ie sy ee aie Sm aes 100 100 100 100 100 100 
Number per acre alive...-.--...---.------ 510 291 306 407 321 426 
Average diameter breast high in inches.... 4.9 6.1 7.0 6.5 4.9 6.6 
Number of species. ....------------------- 8 15 9 14 19 6 
1 Food Plants of the Gipsy Moth in America, F. H. Mosher, Bulletin 250, U .S. Dept. of 
Agriculture, 1915. 
64360°—Bull. 484—17-—_3 a 
