DISEASES OF LEGUMINOUS PLANTS 73 



and stems of lucerne plants and clover, has been 

 found inside the seed and causing^ non-cjermination. 

 Such diseased seed is somewhat shrunk and 

 wrinkled, and much darker in colour than healthy 

 seed. 



The mode of infection is not known, but in all 

 probability it spreads from the stem and leaves to 

 the seed. 



PrecmUion. — Buy only seed well harvested in 

 warm dry districts, and see that it is plump and 

 bright in colour. 



{c) Leaf Spots. — i. Phyllachora Trifolii, Pers. ; 

 2. Pseudopeziza Trifolii, Fiickel ; 3. Pseudopeziza 

 medicaginis, Lib. 



1. Phyllachora Trifolii. — Causes black shinin*^- 

 spots on the leaves of clover, especially red clover. 

 These spots are larger than those caused by 

 Pseudo. Trifolii. No satisfactory preventive is 

 known. 



2. Pseudopeziza Trifolii. — Causes yellowish - 

 brown spots on the leaves of clovers, especially red 

 clover. Serious damage may be caused by this 

 fundus. Preventive measures of no avail. 



3. Pseudopeziza viedicagiuis is res[)onsibl(' tor 

 the yellow spots on lucerne leaves, and in the 

 U.S.A. has caused considerable loss. P>ec|U(!nt 

 cutting has been found to prevent spore formation, 

 and in this way tends to check the sj)read ol the 

 disease. 



