TaBLE 1.—Tree and shrub hosts 
of Verticillium albo-atrum in Illinois. 
Host Plant 
Verticillium Isolations for 
Illinois, 1926-1968 Pathogenicity Tests 
Reported as a Host 
Number 
First Year Number of Number Number 
Isolated of Years Naturally of Plants of Plants 
in Illinois Isolated Infected Inoculated Infected 
Plants 
Almond (Prunus amygdalus Batsch. ) 1932 il 1 
Ash spp. (Fraxinus spp.) 1957 8 10 
Black (F. nigra Marsh. ) 1962 il 1 
Blue (F. quadrangulata Michx. ) 1957 3 3 20a 14 
European (F. excelsior L.) 1964 10b 6 
Green (F. pennsylvanica Marshall 
var. subintegerrima (Vahl) Fernald) 1957 3 4 20a 7 
White (F. americana L.) 1959 3 3 20a ILS 
Azalea (Rhododendron molle G. Don) 1964 1 1 10a 3 
Barberry spp. ( Berberis spp. ) 1957 5h 2 
Japanese (B. thunbergii DC.) 1933 5 6 10a 3 
Boxwood, Korean (Buxus microphylla 
koreana Nakai) 1960 1 il 5a il 
Catalpa spp. (Catalpa spp.) 1942 6 8 
Western (C. speciosa Warder ) 1936 3 4 
Coffee tree, Kentucky (Gymnocladus 
dioica (L.) K. Koch.) 1966 20b 6 
Cork tree (Phellodendron amurense 
Rupr. ) 1964 5b 2 
Elm, American (Ulmus americana L.) 1931 28 406 10a 4 
var. Augustine Ascending 1955 il i} 
Henry Field 1960 1 il 
Littleford 1939 il 4 
Moline 1939 3 5 
Chinese (U. parvifolia Jacq. ) 1951 il 1 
English (U. procera Salisb. ) 1955 il 1 
Slippery (U. rubra Muhl. ) 1951 2; 7 
Goldenrain tree (Koelreuteria paniculata 
Laxm. ) 1948 2 3 5a 3 
Linden, American (Tilia americana L.) 1939 4 4 20a 12 
Little leaf (T. cordata Mill.) 1964 20b AG 
Locust, Black (Robinia pseudoacacia L.) 1932 2 2 
Magnolia spp. (Magnolia spp.) 1951 3 3 
Saucer (M. soulangeana Soul.) 1959 3 3 5a 5 
Star (M. stellata (Sieb. & Zucc. ) 
Maxim. ) 1963 iL 1 5a 2 
Maple spp. (Acer spp.) 1947 24 
Amur (A. ginnala Maxim. ) 1958 1 1 10a 5 
Black (A. nigrum Michx. f.) 1936 1 
United States 
Ill. (Carter 1938 ) 
This report 
This report 
This report 
Colo. (Thomas 1950) 
This report 
This report 
Mass. ( Boyd 1930) 
Ill. (Carter 1945) 
N.J. (White 1936 ) 
This report 
Ill. (Carter 1938) 
Kans. ( Rogerson 
1957) 
This report 
This report 
Ill. (Carter 1938), 
widespread ( Kel- 
sheimer & May 
1940) 
Ill. (Engelhard & 
Carter 1956) 
This report 
Ill. (Carter 1940) 
Ill. (Carter 1940), 
Kans. ( Rogerson 
1957 ) 
Ill. (Engelhard & 
Carter 1956) 
Ill. (Engelhard & 
Carter 1956), wide- 
spread (Kelsheimer 
& May 1940) 
Ill. (Engelhard & 
Carter 1956), wide- 
spread (Kelsheimer 
& May 1940) 
Ill. (Engelhard & 
Carter 1956) 
Ill. (Carter 1940) 
This report 
Ill. (Carter 1938 ) 
Ill. (Engelhard & 
Carter 1956) 
Ind. (Schreiber 
et al. 1961) 
This report 
Calif. (Baker 
et al. 1940) 
This report 
Ill. (Carter 1938 ) 
Other Countries 
Canada (Quebec 
1961) 
Italy (Goidanich 
1935) 
