490 



AMERICAN FORESTRY 



solved. While we have a decrease in 

 the number of nests found in residen- 

 tial sections, we find they have spread 

 to the forests in nearly every section 

 of the city. This can best be combated 

 by applying modern forestry methods 

 to the care of woodlands. By judicious 

 thinnings, i. e., removing such trees as 

 are food for moths and leaving only 

 the most resistant species the 

 moths will soon be removed 

 from the list of dangerous pests 

 if not exterminated altogether. 



"A list of trees that should be 

 removed and one of those that 

 should be retained is appended. 

 This list applies only to forests 

 and not to orchards or shade 

 trees. In both lists first choice 

 is given at the top of the 

 column. The bottom of both 

 columns are interchangeable ac- 

 cording to conditions of wood- 

 land. 



"To he Removed—Old Fruit 

 Trees, Red and Choke Cher- 

 ries, White Oaks, Thorn Ap- 

 ples, Grey Birch, Willows, 

 Witch Hazel, Alder, Hack- 

 berry, Shadbush. Hornbeam, 

 Hop Hornbeam, Black Cherry, 

 Poplars, Elm, Mountain Maple, 

 Striped Maple. 



"To be Left — Pines, Spruces, 

 Hemlocks, Firs, Cedar — Juni- 

 per and Larch, Ash, Hickory, 

 Basswood, Sugar Maple, Red 

 Maple, Black and Yellow Birch, 

 Tupelo and Sassafras, Beech, 

 White Birch, Black Oaks, 

 Chestnut, Locust. 



"This list is only for the guidance of 

 those owning woodland and wishing to 

 do some thinning. It does not mean 

 that all those trees in column headed 

 'To be left' will not be attacked by the 

 gypsy moth, as practically all of them 

 are food for the full-grown caterpillar. 

 It has been found from experiment, 

 however, that the young, newly hatched 

 caterpillar cannot eat the leaves of most 

 of these trees and will therefore starve 

 to death if its 'infant food' (the leaves 

 of the trees in other column) is re- 

 moved. 



"A new method of combating the 

 brown-tail was tried. During the win- 

 ter the nests were removed from the 

 trees as usual. This has been cus- 

 tomary for years and will probably 

 have to be resorted to, in some in- 

 stances, for some years to come. For 

 the past two years we have been con- 

 ducting an experiment on a small scale 



Improved Method of Spraying for Gypsy and Brown-Tail 

 Moth at Fitchburg, Mass. 



with spraying in the fall for brown- 

 tails. We have become so well con- 

 vinced that this method is both suc- 

 cessful and cheaper, that this summer 

 all street and roadside trees were 

 sprayed. At the present time I am sat- 

 isfied that it has been successful and 

 will save the city much money the com- 

 ing season. 



"The brown-tail caterpillar or larva 

 hatches out about the first week in 

 August. An illustration of the life his- 

 tory of the brown-tail moth is here in- 

 serted and referred to by numbers. For 

 the first two or three weeks the young 



