138 ILLINOIS STATE ACADEMY OF SCIENCE 



host but liad been collected by J. M. Bates in 1907 at 

 Lincoln and St. Paul, Nebraska. Later it was learned 

 that Dr. Lehenbauer had also collected it on a single 

 plant in the University of Illinois Floricultnral Green- 

 house in 1919. The rnst was again found in 1921 on 

 calendulas grown in the same garden where it was ob- 

 served in 1920. 



It seems probable that this rust is seed borne. While 

 it occurs on Senicio this host is not common in the re- 

 gion about Urbana and has never been observed to har- 

 bor a rust when observed. The fact that the disease 

 was observed on a greenhouse plant also indicates seed 

 as a source of infection. The soil used in the pots is not 

 a likely source of infection. The rust also occurs on 

 Dimorphotlieca cuniata, a common ornamental- plant, but 

 this had not been grown in the region about Urbana 

 for a number of years. 



Seed sterilization is suggested as a remedy for this 

 rust. To date it has not been general enough to war- 

 rant expensive control measures nor has the injury on 

 individual plants been severe since the spots are few and 

 scattered. 



GOURD 



Anthracnose {CoUetotrichuni lagenarium (Pass.) Ell. 

 and Hals.). A variety of an edible gourd known as the 

 Australian Bean has been grown in the University vege- 

 table garden during the past two years. On account of 

 the prolific production of fruit on this plant there has 

 been some thought of recommending it as a desirable 

 cucurbit for the garden. It is of interest, therefore, to 

 know something concerning the diseases which attack it. 



In the autumn of 1921 a number of fruits of this gourd 

 were stored in one of the University buildings. When 

 examined in October several were observed to be in a rot- 

 ting condition and many more were covered with lesions 

 of a disease which resembled watermelon anthracnose. 

 Some of the spots were small and quite numerous while 

 others were several inches across. In the cases where 

 rotting had set in, the fungus had extended through the 

 outer hard rind into the pulpy interior where it often 



