NEw YORK AGRICULTURAL EXPERIMENT STATION. 235 
osporium medicagims Ell, & Kell.,2°? Gloeosporium morianum 
Sacc.,2 Pleosphaerulina briosiana Pollacci,* Macrosporium medi- 
cagimis Cugini,© Erysiphe polygom DC.,2°% Phyllosticta medicag- 
mis (Feckl.) Sacc.,% Septoria medicaginis Rob. & Desm.,1% As- 
cochyta pist Lib.,2°° Cercospora helvola Sacc.,4° Laestadia destruct- 
wa (Berk. & Br.) Berl. & Vogl.14 
BACTERIAL DISEASE. 
Paddock"? has given a brief account of a supposedly bacterial 
root disease of alfalfa occurring in Colorado. 
PHANEROGAMIC PARASITES. 
Several species of dodder (Cuscuta) have been recorded as at- 
tacking alfalfa stems. How many of them occur in New York is 
not known. (See page 108.) 
There are also a few phanerogamic root-parasites. Nobbel!? 
states that three species of Orobanche, viz., O. buekiana Koch, O. 
rubens Wallr. and O. minor Sutt., are parasitic on alfalfa in Ger- 
many. Lignier!4 includes Medicago sativa in the list of host plants 
of Thesium divaricatum var. humifusum A. DC. 
INSECTS, NEMATODES AND OTHER ANIMAL ENEMIES. 
Having given but little attention to the insects affecting alfalfa,1° 
the writers are unable to enumerate the species occurring in New 
York. 
Ellis and Kellerman (26). 
= saccardo (80, tf0:456); Frank (30, 2:380). Saccardo (Syll. Fung. 
18:449) gives Medicaggo sativa as the host of Gleosporium caulivorum 
Kirch. This seems to be an error. The only host given by Kirchner 
(Ztschr, Pfhlanzenkrank,. 12:10) is Trifolium pratense, 
™ Pollacci (79); Briosi and Cavara (8, No. 383); Saccardo (86, 16:554). 
* Saccardo (86, 18:618). 
“Salmon (87, p. 180); Prillieux (80, 2:14). 
Beeaccatdo (86, 3:42). 
™Saccardo (86, 3:508); Frank (30, 2:431). 
® Rostrup (84), (85). 
™ Frank (30, 2:350); Voorhees (104, p. 155). 
McAlpine (62, p. 127). 
eoPaddoctk.¢74). 
™ Nobbe (73, p. 470). See also Caspay (12) and Koch (56). 
™*Lignier (60). 
“$ For an account of the insects injurious to alfalfa see Bruner and Hunter 
(10); or Headlee (42). 
