CROTALARIA, A NEW LEGUME FOR THE SOUTH KZ 
5 per cent of the plants. The fungus attacks the plants following 
blossoming time, being prominent on the stalks and seed pods, and 
commonly forms spots on the leaves. It usually attacks the stems at 
the point of union of stem and peduncle of the seed pods, where 
brown lesions are formed. The lesions eventually girdle the entire 
stem. As the lesion develops in both directions from the original 
infection the killed area rapidly dries out and the bark breaks 
away from the woody portions of the stem. These lesions often 
involve from 2 to 10 inches of the stem, and after the lesion occupies 
an inch or more of the stem area the fungus develops conidia in 
abundance on the area involved. The seed pods are usually infected 
from either end, from which the fungus overgrows the remaining 
portions of the pod and develops fruiting bodies. The areas on the 
leaves are not so numerous, although they are often 2 centimeters or 
more in diameter and covered with fruiting bodies. 
During 1929 this trouble was more conspicuous and caused greater 
losses than any of the other diseases of crotalaria with the possible 
exception of Cercospora leaf spot. 
ALTERNARIA LEAF SPOT 
Alternaria leaf spot, found occasionally on declining leaves, is 
caused by Alternaria sp. It is not conspicuous or of economic 
importance and is worthy of mention only. 
HELMINTHOSPORIUM LEAF SPOT 
Helminthosporium leaf spot, caused by Helminthosporium sp., 
has been collected a very few times and has not been found to be of 
any importance on any of the various species of Crotalaria grown. 
It is reported primarily because of its occurrence. 
NEMATODE RESISTANCE 
In experimental and extensive commercial plantings the Crotalaria . 
species have been found immune to nematodes. This fact is of 
great economic importance in connection with any crop throughout 
the South. 
DESCRIPTION OF SPECIES 
The species included in this study are described in the following 
pages. General agronomic notes indicative of the probable value 
of the species under cultivation also are given. A key to the species 
is included to facilitate identification. 
KEY TO THE SPECIES 
Leaves monofoliolate. 
Stipules large. 
Pom pubescent; lowers less ye Se C. verrucosa 
Pod without pubescence; flowers yellow____________ C. mysorensis 
Leaves with long pubescence. 
Leaves with short pubescence. 
Flowers many, in long terminal racemes; 
under side of leaf with short pubescence__ C. spectabilis 
Flowers 2-3, in lateral and terminal ra- 
cemes; both sides of leaf with midlong 
PU DESE CGC ee ete ee Spee ne ee C. alata 
