Mar. 25, 191S Dissetnination of Chestnut-Blight Fuiigus 



521 



were transferred to 3 per cent dextrose agar for further study. In gen- 

 eral, it may be said that transfers were not necessary, for the colonies of 

 E. parasitica are very characteristic on chestnut-bark agar at the end of 

 five days, if they have had sufficient room in which to develop. It was 

 only in the case of plates badly crowded \vith other fungi that such trans- 

 fers were necessarv. 



RESULTS AND DISCUSSION OF TESTS 



The water spore traps were exposed in or near the same plot of badly 

 diseased chestnut trees at West Chester, Pa., which was employed for 

 the exposure plates previously reported. Six different stations were 

 selected for the location of water spore traps at distances varying from 

 15 to 389 feet from the nearest blight lesions, although Station V was 

 404 feet from the nearest probable source of spores. More detailed in- 

 formation in regard to these stations is given in Table XVI. 



Table XVI. 



-Relation of water spore-trap stations to diseased chestnut trees in IOI3 at 

 West Chester, Pa. 



Table XVII. — Summary of the tests with -water spore traps in IQ13, at West Chester, Pa. 



