OUNG PINES, both nursery stock and natural 
reproduction, are often defoliated by larve of 
Leconte’s sawfly. Defoliation of young pines is usu- 
ally severe in its effects, killing, misshaping, or 
weakening the trees to such an extent that attacks 
of secondary enemies will kill them. 
This insect is common on the scrub pines through- 
out the eastern United States and is a constant 
menace to the better species in nurseries or reforest- 
ing areas. It can be controlled in nurseries and 
parks, when the infestation is heavy, by spraying 
with lead arsenate at the rate of 2 pounds of the 
powder to 50 gallons of water; or, if scatteringly 
present, by hand methods such as knocking the 
larve from the trees and crushing them. 
In larger and less accessible areas, where it would 
be impractical to attempt control by spraying, rang- 
ers and lumbermen should make a practice of de- 
stroying the colonies of these larvae whenever they 
are found. 
Contribution from the Bureau of Entomology 
L. O. HOWARD, Chief 
Washington, D. C. January, 1922 
