96 



MAINE STATE COLLEGE 



of this species is reported from New Jersey and Xew York, upon 

 living and languistiiug leaves of Zeo Maydis. The variety is 

 reported from Warwickshire England and so far as we know has 

 not been reported before from the United States. The conidia of 

 our specimens were 40 — 80x15 m m and 1 — 5 septate. See Fig. 3. 

 Saccardo gives the dimensions GO — 100x12x22 m m and 4 — o 

 septate. The spores of our specimens are somewhat shorter and 

 sometim-s with less septa. This fungus is no doubt truly parasitic 

 and capable of producing the languishing condition of the oat 

 plants. In the specimens sent by Mr. Gilbert the disease had not 

 progressed far enough to show the spore, masses which were dark 

 brown colored and appeared as small dark dots or lines upon the 

 leaves sent by Mr. McKeen. 



Specimens taken from an oat field upon the college grounds that 

 appeared to be similarly affected yielded, upon examination, another 

 fungus known as 



Cladosporiirni herharoru'/n TPers.) 



The conidia of this species are 

 G — 20X5 — 7 mm and without 

 septa or 2 — 3 septate. This 

 species is almost world-wide in 

 B^ distribution and attacks members 

 of several botanical families. It 

 Yis.i. oriainai. Fisr. 4. is described in Saccardo's Sylloge 



IV. p. .350. The spores are shown much^enlarged in Fig. 4. 



The languishing of oat plants in Maine is, therefore, due to the 

 combined action of the two parasites named above. As they are 

 both internal paro.S'te.-; we know of no remedy for them. They 

 would probably be much worse in wet, warm seasons and on low 

 land. 



