512 
The Ohio Naturalist. 
[Vol. VI, No. 6, 
losa.'* A critical examination of the species of Leguminosae 
grown at the station in 1904 and 1905, showed all of these to be 
free. Following are the results from the various Leguminosae 
grown on the Station variety plots in 1904 and 1905: 
Host. 
Examined 
July 22, 1904. 
Examined 
July 28, 190.5, 
Hairy Vetch 
Free 
Free. 
S])ring Vetch 
Slightly on leaves... 
White Lupine 
Free 
* 
Lentils 
“ 
Grass Peas 
Free. 
French June Peas 
Very bad 
Very bad. 
On leaves and stems 
Scotch (jrav Peas 
Slightly on leaves.. . 
Velv'et Beans 
Free 
* 
Horse Beans 
Free. 
IMedium Green Soy Beans. . . 
“ 
. 
Mammoth Yellow Soy Beans 
“ 
* 
Beggar Weed 
■¥ 
Free. 
Yellow Lupine 
* 
** 
Flat Peas 
Alfalfa 
Free ; . . . 
Egyptian Peas 
“ 
Russian Blue Peas 
No planting.* 
Climate certainly determines largely the seriousness of at- 
tacks by this fungus. For example, Lochhead'" describes a ser- 
ious outbreak on Egyptian-peas in Ontario in 1903. V^et, while 
we have experienced an exceptional attack by the fungus during 
1904 and 1905, Egyptian-peas have proved to be entirely free of 
the disease. Excessive moisture during these two years, is 
doubtless the chief factor in this outbreak. Added to this, is 
the continual growing of peas on the same ground. When peas 
have been planted on the same soil for two or more successive 
years, the loss may be considerable, even in ordinary seasons. 
Two years rotation in other crops, relieves the land of the trouble 
for the time at least, showing that the fungus lives over in the 
soil or compost as well as in seed peas. 
Previous outbreaks have been reported. Krueger’’^ states 
that in one place, the cultivated field crop was a complete failure 
in LS94. Combes" reports it as attacking pea stems so seriously 
as to cause a wilting of the tops, in 1879. 
14. Ducomet. Prog. Agr. et \it. (EdL’est) 22 (1901) No. 34, pp. 225-233. 
1.5. Lochhead, 1. c., p.*26. 
16. • Krueger, 1. c., p. 621. 
17. Combes, Crittogamia agraria. p. 473. 
Botanical Laboratory, Ohio Agricultural Experiment Station, 
November 23rd, 1905. 
