Bui. 787, U. S. Dept. of Agriculture. 



Plate 1 1 . 



Fig. I.— Natural Growth of Locust in an Old Abandoned Field of Some 

 60 Acres in Extent at Falls Church, Va. 



An isolated clump of some 30 trees, 2 to 4 inches in diameter. These were growing close together and 

 mixed with tall weeds and sassafras bushes. Illustration after clearing the trunks in July when 

 not a single borer was present. In September these were heavily infested. 



Fig. 2.— Illustration of a Fence Row at Falls Church, Va., Showing 

 Thick Locust Growth of 2 to 5 Inches in Diameter near Base. 



None of these trees contained borers in July, 1918, when the imderbrush and small branches were 

 cleared from the trees in the foreground. These trees were infested in September. 



PROTECTION FROM THE LOCUST BORER. 



