2l6 MAINE AGRICUI.TURAI. E;xPERIME;NT STATION. I913. 



appearance with those of Sporotrichiim poae. Dilution plate 

 cultures were made and in three days colonies had developed 

 w^hich were producing spores. These were of both the one- 

 celled, obovate and the septate types. Transfers were made 

 from the colonies in the plates to sterilized bean pods in tubes. 

 When the growth on bean pods was examined three days later 

 it was found that large numbers of the ohovate spores had been 

 produced and only a small proportion of the septate type. It will 

 be seen that this fungus, F XXIV, agrees very closely in its 

 characters with Sporotrichum poae as described by Stewart. It 

 also agrees closely with Barrett's Fusarium I, F XXXVI, from 

 corn from Illinois and with one of the fungi isolated from 

 potato, F IX, and one from sweet corn by the writer, F VI. 

 The fungus was tested on carnation buds by inoculating 24 buds 

 of the Enchantress variety and 22 of these were destroyed. 



After about 2 weeks, June grass was again examined. This 

 time a large number of plants showed the presence of the fungus 

 on the injured culms. The mites which Stewart and Hodgkiss 

 found associated with the fungus were also found here.* The 

 explanation of the common occurrence of the fungus at this 

 time in contrast to its rare occurrence 2 weeks earlier is found 

 in the fact that the second examination was preceded by a period 

 of rainy and cloudy weather which was favorable to the growth 

 of the fungus. 



Fowl meadow grass, Glyceria nervata (Willd.) Trin. which 

 had been injured by the grass thrips was examined June 28 and 

 showed the presence of a fungus which seemed to be identical 

 with the one from June grass, F XXIV. On July 7 a rather 

 large number of plants were examined and the fungus was 

 found to be of frequent occurrence. Dilution plate cultures 

 were made, F XXVII, and later material was transferred from 

 colonies to tubes of various media where the growth was so 

 nearly the same as that of the June grass fungus that one could 

 not be distinguished from the other. 



* Cary, see pp. 100 and 112 of the i8th Annual Report of the Maine 

 Agricultural Experiment Station, attributes the "silver top" of Jnue 

 grass and certain other grasses in Maine to the grass thrips Anaplio- 

 thrips striata Osborn. Material examined during different seasons 

 showed both the mites ard the thrips associated with the diseased plants. 



