DISEASES OF LEGUMINOUS PLANTS 67 



{a) Clover i^Uromyces^ apiculatus, Schrot. ; U. 

 Trifolii, Heel.).— Common on red, white, and alsike 

 clover. On white clover uredo-, teleuto- and 

 aecidiospores are formed, while on the other two, 

 uredo- and teleutospores only. The mycelium 

 causes thickening- and wrinklino- of the stalk and 

 veins of the leaf. 



(/?) Beans {U. pkaseohvitni).— AW three kinds of 

 spores are formed ; haricot and scarlet runner 

 beans are chiefly attacked. 



(6") Peas [U. pisi). — Uredospores and teleuto- 

 spores are formed on different species of Pisitin, 

 Latkyrus and Vicia, aecidiospores on the s[)uroe 

 {Eicpkorbia). 



(d) Lucerne {(J. siriatus, Schroeter). — Causes 

 rust spots on various species of Medicago, due to 

 the formation of uredo- and teleutospores. The 

 aecidiospores are formed in the spurge. 



Preventive Me as n res . — 



1. Burnino- of infested areas is recommended 



in each case but is impracticable. 



2. Sow early. 



3. Keep down such weeds as spurge. 



III. ScLEROTiuM Disease of Clovers (Scleral inia 

 Trifolioruni). Class : Ascomvcete.e ; Order : Pe/i- 



ZALES. 



This disease causes more harm to our clover 



^ The genus Urotnyccs differs from Puccinia in having one-celled 

 teleutospores. 



5* 



