12 CIRCULAR 4 64, U. S. DEPARTMENT OF AGRICULTURE 



Class 1. — Species that are favored food for the gypsy moth larvat 



Alder, speckled 



Apple 



Aspen, American 



Aspen, large-toothed 



Balm-of-Gilead 



Birch, gray 



Birch, paper 



Birch, red 



Blueberry (Yaccinium angusti folium) 



Boxelder 



Gum, red 



Hawthorn 



Hazelnut 



Hazelnut, beaked 



Larch, American 



Larch, European 



Linden, American 



Linden, European 



Mountain-ash 



Oak, black 



Oak, dwarf chestnut 



Oak, rock chestnut 

 Oak, bear 

 Oak, bur 

 Oak, pin 

 Oak, post 

 Oak, red 

 Oak, scarlet 

 Oak, shingle 

 Oak, swamp white 

 Oak, white 

 Poplar, Lombardy 

 Rose, pasture 

 Serviceberry 

 Spruce, blue 4 

 Sumac, mountain 

 Sumac, scarlet 

 Sumac, staghorn 

 Willow, glaucous 

 Willow, sandbar 

 Willow, white 

 Witch-hazel 



Class 2. — Species that are favored food for the gypsy moth after the earlier larval 



stages 



Beech, American (l) 4 



Cedar, red (4) 



Chestnut 



Hemlock 



Pine, jack 



Pine, pitch 



Pine, red 



Pine, Scotch 



Pine, western white 

 Pine, white 

 Plum, beach 

 Spruce, black 

 Spruce, Norway 

 Spruce, red 

 Spruce, white 



Class 3. — Species that are not favored but upon vjhich a small proportion of the 

 gypsy moth larvae may develop 



Barberry, European 



Bayberry 



Birch, black 



Birch, yellow 



Blueberry, low 



Blueberry, tall 



Butternut (4) 



Cedar, southern white (4) 



Cherry, sweet 



Cherry, wild black 



Cherry, wild red 



Chokeberry 



Chokecherry 



Cottonwood 



Cranberry, American 



Elm, American 



Elm, European 



Elm, slippery 

 Gum, black 

 Hickory, bitternut 

 Hickory, mockernut 

 Hickory, pignut 

 Hickory, shagbark 

 Hophornbeam 

 Hornbeam, American 

 Maple, Norway 

 Maple, red 

 Maple, silver 

 Maple, sugar 

 Pear 



Poplar, silver 

 Sassafras 

 Sweetfern 

 Sweetgale 



4 Numbers in parentheses refer to the original classification of plants that have been reclassified, 

 spruce has been subsequently added. 



Blue 



