PAPERS OX BIOLOGY AND AGRICULTURE 91 



time as a serious wheat disease. Its distribution appears 

 limited to central Illinois where it was seen most com- 

 monly on hard winter varieties. 



The Crown Rust of Oats was much less abundant than 

 usual, although there were severe local outbreaks north- 

 ward traceable in some cases to the presence of the Buck- 

 thorn in cultivation. Smut was more prevalent and oc- 

 curred everywhere, with the exception of a few counties 

 where preventive treatment is consistently used. Stem 

 Bust was rare in the south but occurred throughout the 

 state. 



Barley suffered only slight Leaf Bust infections, but 

 the loss from Loose Smut was rather large. The Stripe 

 disease was very important in northern Illinois. On 

 Bye. the Ergot infection was slight but Leaf Bust in- 

 fection was prevalent and fairly severe. Scab was found 

 only in Christian county. Stem Smut was prevalent in 

 central Illinois where it caused some very severe losses 

 in individual fields. 



Bosen's Disease of Corn was found in Alexander 

 county. Stewart's Disease was not of great importance 

 but was much more general than usual. The Black 

 Bundle disease appeared to have a general distribution 

 and was an important source of loss. The range of the 

 Brown Spot disease was extended northward to Carroll 

 county and was much more abundant southward than 

 usual. 



VEGETABLE AXD EIELD CROPS 



The Angular Leaf Spot of Cucumber was found in the 

 state for the first time and the Anthracnose disease ap- 

 peared in considerable severity in Union county on this 

 crop as well as on Canteloupes and Mnskmelons. Water- 

 melons suffered much less than usual from "Wilt but the 

 wet season was especially favorable to the development 

 of Anthracnose which caused total losses in some dis- 

 tric 



Cabbage Yellows was less severe than usual, but more 

 than the usual injury resulted from the great preval- 

 ence of Black Bot. A slight Club-root infection was seen 

 in Cook countv and Black Mold was very serious locallv 



