Dutch Emn disease
-compared to chestnut blight?
has not been as devastating as chestnut blight (affects American elm, a popular tree in towns and yards
symptoms: leaves begin to wilt, turn yellow, then brown, then drop off tree; fungal spores and tyloses interfere with water movement through the xylem
-first introduced into US in early 1930s on wood from Europe; originated in Asia; first foundin Ohio and seen as far west as Nebraska by 1935; reached CA by the 1970s