PAPERS OX BIOLOGY AND AGRICULTURE 145 



within the state, aiid from every county in which the 

 disease occurs. 



In connection with the study of diseases not having 

 special economic importance, it becomes the duty of the 

 survey to attend to the scientific study and description 

 of all new diseases. It is also necessary to watch care- 

 fully the entire state for the presence of newly imported 

 diseases, and have on hand infoimation showing newly 

 reported diseases in other places which might invade the 

 state and cause additional crop losses. 



SUMMARY OF THE FIRST SEASON 's WORK 



Following the beginning of the work of the Plant 

 Disease Survey early in July of 1921, the lines of work 

 outlined above have been carried on to as large an extent 

 as possible. 



Attention has been given to as many crops as possi- 

 ble, and collections of specim-ens have been made, and es- 

 timates of damage arrived at, in co-operation with other 

 agencies throughout the state. 



While, at the time of the beginning of the work, the 

 grains of the state were largely cut and harvested, it was 

 possible to make a survey through several counties on the 

 northern boundary of the state. The material gathered 

 here was correlated with other inf oiTaation received from 

 various sources from several parts of the state, and com- 

 bined Avith the information on hand at the Department of 

 Crop Production at the University of Illinois with the as- 

 sistance of Mr. G. H. Dungan, to form an estimate of the 

 damage to grains through the various parasitic diseases. 



Fruit, vegetable and other crops were still available 

 for a reasonable amount of attention following the es- 

 tablishment of the sur\'ey. As a consequence, a relatively 

 larger amount of data was collected along this line than 

 in the case of cereals. This data was combined with in- 

 formation on hand in the Horticultural Department of 

 the Universitv of Illinois, and the two sets combined in 



