Kl'KlHAYASlII : 'illK AsCK.EKliUS STACK l.l-' IlliU.lMilOSl-OKIUM SATIVUM 143 



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^I'M ^ ACTS Hdminthxporiuiii sativum P. K. et B. 07-^KStWf^' '^ W^"^ o ^£ 

 £JLt, ^^^k Ophiobohis sativns (P. K. et B.) Pro et Kukiuavashi t.i^^x 

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resump: 



In the present paper it is intended to report on the ascigerous stage of 

 Hcliiiintltosporiiiin sativum P. K. et B. whicli was produced in an artificial culture. 



In the summer of 1927, the leaves of barley and wheat affected by H. 

 sativuvi were collected in the experimental farm of our University, and the 

 isolation experiments of the fungus were conducted from these leaves on rice- 

 culm decoction agar. Small blackish sclerotium-like bodies as well as the conidia 

 of H. sativum were alwaj's formed on all sides of the small pieces of the host 

 tissue placed on the media and about four to fi\-e weeks later, these scierotium- 

 likc bodies developed into the perfectly matured perithecia, showing the charact- 

 ers of the genus Ophiobohis. 



In a single-spore culture from the filamentous ascospore in the perithecia, 

 the conidial spores identical to H. sativmn were produced abumlantl)- on various 

 cultural media. Moreov^er, the successful inoculation by the conidia was ob- 

 tained on barley and wheat, and the characteristic lesions appeared on the leaves 

 and foots of the host plants. 



Since the ascigerous stage of H. sativum seems to have not yet been des- 

 cribed up to the present. We wish to propose the new name, Opiiiobohis sativtts 

 (P. K. et B.) Ito et Kukibavashi for the fungus, and its description is given 

 as follows : — 



