CONTROL OP GIPSY MOTH BY FOREST MANAGEMENT. 33 



ing the stand regarded as the price the owner has paid for the satis- 

 faction of not denuding his land, for relief from annual expenses, the 

 results of which are only palliative, and for future insurance against 

 damage by the gipsy moth. 



The possibility of control by management, without planting, is the 

 object of experiments now in progress. 1 Pending their conclusion, it 

 is believed that sufficient information has been given in the foregoing 

 to guide owners of stands of this character who wish to do something 

 at once. 



Of the two plans outlined, the first, clear cutting and immediate 

 planting of the whole area, is preferable from considerations of forest 

 management, of moth control, and of minimum expense. Economic 

 conditions preclude the expectation of its general adoption in the 

 near future, but it is strongly recommended to owners willing to meet 

 the expense. 



Others must face the fact that they can not at present expect to 

 secure moth control by forest management. 



STAND AT EXETER. NEW HAMPSHIRE. 



THE MANAGEMENT OF A TYPICAL MIXED OAK STAND WITH THREE-TENTHS WHITE OAK. 



The woodlot of 2.5 acres contained 15 species, but since red, white, 

 and black oak together constituted 87 per cent of the whole, it may be 

 considered from the standpoint of management as a mixed oak stand. 

 It is on good agricultural soil, a dark, brown, sandy loam, deep, moist, 

 and well drained. The trees averaged 6.1 inches in diameter breast 

 high and about 35 years old. 



The surrounding region had been infested with the gipsy moth 

 since 1908, the infestation coming apparently from the northeast. 

 In 1913 the count on this lot disclosed 949 egg clusters per acre. 

 There was very severe defoliation, but it was not all due to gipsy- 

 moth caterpillars. They were responsible for part of it, but a very 

 large part was the work of brown-tail and forest tent caterpillars. 



If the stand were not infested, it could be handled like that at 

 Dover, as a sprout forest. 



If the owner wishes to attempt to control the gipsy moth by forest 

 management, the two methods suggested for Dover will be applicable, 

 with certain modifications. 



One cutting. — If cut clear and planted, the products will be less, 

 because, though the trees averaged a little larger, there were only 

 three-fifths as many — 300 per acre. The product wiH probably be 

 about 20 cords of good cordwood per acre, worth, as this lot is 

 situated, about $3 per cord on the lot. 



1 See also, Results of Experiments in Controlling the Gipsy Moth by Removing Its 

 Favorite Food Plants. By A. F. Burgess and D. M. Rogers, Journal of Economic Ento- 

 mology, Vol. VI, pp. 75 to 79 (1913). 



