U.S. DEPARTMENT OF AGRICULTURE. 
DIVISION OF ENTOMOLOGY. 
BULLETIN No. 20. 
THE 
ROOT-KNOT DISEASE. 
OF THE 
PEACH, ORANGE, AnD OTHER PLANTS 
IN 
FLOR EDA, 
DUE TO THE WORK OF ANGUILLULA. 
PREPARED, UNDER THE DIRECTION OF THE ENTOMOLOGIST, 
BY 
J. C. NEAL, Pu. D., M. D.- 
WASHINGTON: 
GOVERNMENT PRINTING.OFFICE. 
1889. 
