2 FARMERS’ BULLETIN 2068 
irrigated European chestnut or- 
chards in California, but blight con- 
trol in other such orchards appar- 
ently has been successful in all 
cases. Every tree found to be 1n- 
fected is destroyed. In Washing- 
ton, Oregon, and California, State 
officials inspect chestnut plantings 
for the blight and take measures to 
control it; they also rigidly enforce 
an embargo on shipment of chest- 
nut nursery stock from the East. 
Control of the blight in the Pacific 
States is favored by the absence 
there of any native growth of chest- 
nut and by the fact that the chestnut 
plantings are isolated from each 
other. Any suspected infection in 
a western State should be reported 
to the State plant pathologist. 
Ficure 1.—Spread of the chestnut blight in the Eastern States. 
bounds the natural range of the American chestnut. 
The solid line 
Broken lines bound the areas 
within which the blight had killed at least half the American chestnuts at the 
dates indicated. 
