208 Proceedings of Indiana Academy of Science. 
in the northern third of the state and its occurrence locally seemed to be 
associated with certain threshing rings. 
Loose smut of wheat was not as prevalent as in 1919. While the average 
loss was about 2 per cent, in certain fields as high as 25 per cent of loose 
smut was found. Pipal reports that in 400 demonstration fields a practically 
perfect control was obtained by the hot water treatment while an average 
of 5.1 per cent of smut occurred in the check fields. The central treating 
plant control method is meeting with marked success. 
SUMMARY. 
The plant diseases of outstanding economic importance as observed during 
the 1920 season are as follows: 
Mp Wlescr --s)e1 ..--- blotch; seab; black rot; (hail injury). 
INSTIATOS Grogan aoe .+- Fusarium wilt. 
Reali eo.s).2ce oe .--bacterial blight; mosaic. 
MaAWWALe sae ois «= scissile yellows. 
Cantaloupe........ . bacterial wilt; leaf-blight; mosaic. 
CAIDA stipe oaoricoerc .-early blight; bacterial spot. 
(QINDIA~A aoa Dopodoue Coccomyces leaf-spot. 
(GING peers aceie/ aie! «ous .- Fusarium root, stalk and ear infection: smut. 
(CHEN ss ooo conne bacterial wilt ; mosaic. 
GID 5 4an Stas spicieisie 2 VOLOWS: 
Onion (sets)..... erele SIMUL Bs 
RSG sw AtorD A eOee . leaf curl; black spot. 
Cae eae 2: = ee Soe Diet 
124 bhi eleen mara S aia aleists ..-brown rot. 
|OUR «SH OBA .-Fusarium wilt; hopperburn or tipburn. 
Raspberry..........anthracnose. 
Soybean........ ...ebacterial blight . 
MOMALOs s <1 © .e-eeeeneptoria leaf-spot; Fusarium wilt; mosaic; blossom- 
end rot; infected growth cracks. 
Watermelon........ Fusarium wilt. 
Wheat: ><. wees LOOSE SMUt; Stinking smut. 
Plant diseases found in 1920 which have not been previously recorded 
for Indiana: 
ATID LE Ria reteucuctol ote s'0!s7s . water core. 
letidNpasa Goose D AC .-bacterial blight caused by Bacterium translucens ; 
leaf-spot caused by Rhynchosporium secalis. 
lafelitie Sug 5 muni .....-root rot due to Fusarium species. 
Beet...............- nematode root-knot. 
aE Ole aaa «ielerer> ..-.enematode root-knot. 
Cauliflower..........yellows caused by Fusarium conglutinans. 
Ohrysanthemum.....leaf-spot due to Seploria chrysanthemella, 
(ORM sais eicrete .eeeeeePhysoderma zeae-maydis. 
Cucumber...........nematode root-knot. 
Tarkspur...........Sclerotium rolfsii. 
WHELEUCE cree 210 .....-nematode root-knot. 
Oats............-..eHalo blight caused by Bacterium coronafaciens. 
IPATSNID22 +)» cis’ ...-.eDematode root-knot. 
Bemehe vascok eae .. cdie-back (Valsa leucostoma). 
GAR ne cciee ores ... sooty blotch 
SOV REATL os < wre ober .. bacterial blight caused by Bacterium glycineum (prev- 
iously noted, Plymouth, 1918) ; mosaie. 
Spinach.............blight or mosaic. 
Squash..... pos oe ee DACLEraAl wilt. 
Sweet potato....... .scurf caused by Monilochactes infuscans; Fusarium 
stem rot. 
MPomabo® eo). <i ie chess .white spot or bird’s-eye spot (cause unknown). 
AUNT ain le + e's ohe's oe LAOS AIC. 
