CARROT. 
Sclerotinia sclerotiorum 
TURNIP AND SWEDE. 
Phoma napobrassicae 
Bacterial Diseases 
Finger and Toe 
MANGELS. 
Rhizoctonia violacea 
Phomea betae 
REPORTS ON THE STATE OF SCIENCE.—1918. 
ROOTS. 
Lossz&s. 
At times destructive in store. 
Very destructive locally in the North. 
Very bad at times. 
Widespread, and very destructive in certain 
localities. j 
At times destructive. 
Locally destructive. 
POTATOES. 
Blight. Phytophthora infestans Average loss in British Isles one ton or more per 
acre. Administrative action taken. (Spray- 
ing.) 
Wart Diseases. Synchytrium Very serious indeed. Administrative action 
endobioticum taken. (Immune varieties.) 
Black-leg. Bacillus phytophthor- At times very considerable and apparently 
pus increasing. Inspection of growing seed crop 
necessary. 
Corky Scab. Spongospora sub- 
terranea 
Sclerotinia sclerotiorum 3 
Leaf Curl. (Probably  physio- 
logical) : 
Bacillus solanacearum . 
Sprain 
Dry Rot. Fusarium caeruleum . 
Verticillium . : 
Difficult to control. Locally bad. 
Bad in West of Ireland. 
Bad, especially in gardens and allotments. 
2? Good seed essential. 
9 
Causes serious losses in store, especially amongst 
early varieties. 
? Apparently increasing; responsible for local 
failure of crop. 
VEGETABLES. 
BEAN. 
Pod Canker. Colletotrichum 
lindemuthianum 
Rust. Uromyces fabae s\caage 
Pras. 
Streak. Bacterial? .  . 
Mildew. Erysiphe polygoni 
BRaAssIca. 
Fingerand Toe. Plasmodiophora 
brassicae 
Bacteriosis. 
pestris 
Pseudomonas cam- 
CELERY. 
Septoria apii .  . 
ONIONS. 
Mildew. Peronospora schleideni 
Sclerotinia sp. areata 
ToMATO. 
Cladosporium fulvum 
Leaf Spot. 
Rust. 
Potato Disease. Phytophthora 
infestans 
Canker. Mycosphaerella  citrul- 
lina 
Stripe. Cause obscure : 
Causes considerable damage in certain seasons. 
? 
Very considerable. 
Considerable. 
Considerable in certain seasons. 
Locally responsible for serious damage. 
Annually responsible for serious losses under glass. 
Responsible for decay of much fruit in the open. 
Very serious at a few centres in the past. At 
present almost absent. 
Causes very serious losses in many parts under 
glass. 
