4 SUGGESTIONS FOR OWNERS OF WOOD LOTS IN NEW ENGLAND. 



2. Species of trees having the highest commercial value should be given every 

 opportunity to grow and develop well. All other trees interfering with their growth 

 and development should be removed. 



3. Most trees to grow to the best advantage need a large amount of light. A thin- 

 ning should aim to space the trees so that each individual shall have a proper amount 

 of light. 



4. The foliage of certain species of trees is more desired by gipsy moths than that 

 of other species. The removal of such trees may often afford relief from these pests. 



5. The price of lumber is rising, and the value of woods of good quality will rise 

 correspondingly. Thinning may often be a great help in the production of such 

 woods, besides increasing the rate of growth. 



6. Cutting clean is injurious to forest soil, and a long time must elapse before another 

 cut can be grown. Since no one can predict how long war conditions will last, it 

 seems advisable to cut gradually, removing the poorest trees first and saving the 

 better ones for higher prices. 



There are 75 species of native and naturalized trees growing in 

 this region. Realizing their varying liability to gipsy-moth attack, 

 the Bureau of Entomology has conducted extensive laboratory 

 experiments for a series of years to determine the susceptibility of 

 each of these species. It has been found that the small caterpillars 

 will not feed on certain kinds of foliage, although they may seriously 

 injure the same trees after becoming nearly full grown. Other 

 trees are eaten freely by caterpillars of all sizes, while some foliage 

 is never attacked. 



All of the laboratory experiments were supplemented by extensive 

 observations on the feeding of the caterpillars in the field, and from 

 the data secured the forest trees have been grouped in the following 

 classes : 



CLASS I. Species that are favored food of gipsy-moth larvx in all their stages. 



Ash, Mountain. 



Aspen. 



Aspen, Large-tooth. 



Balm of Gilead. 



Basswood. 



Beech. 



Birch, Gray. 



Birch, Paper. 



Birch, River. 



Boxelder. 



Oak, Black. 



Oak, Bur. 



Oak, Chestnut. 



Oak, Pin. 

 Oak, Post. 

 Oak, Red. 

 Oak, Scarlet. 

 Oak, Scrub. 

 Oak, Swamp white. 

 Oak, White. 

 Service Berry. 

 Sumac, Dwarf. 

 Sumac, Staghorn. 

 Tamarack. 

 Willow, Glaucous. 

 Witch Hazel. 



CLASS II. Species that care favored food for gipsy-moth larvse after the earlier larva stages. 



Chestnut. 

 Hemlock. 

 Pine, Pitch. 

 Pine, Red. 



Pine, White. 

 Spruce, Black. 

 Spruce, Red. 

 Spruce, White. 



