CROWN RUST OF OATS. 



47 



Taulk (i. — liiuculalioii exjyerhni Ills irilh J redo cor on ata — Contiimeil. 



Date of 

 iuocula- 

 tiou. I 



I'hu'o where cxi)eri- 

 lueutH were made. 



1886. 

 Feb. 17 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do.. 



"VVasliington, D. C . . . 

 il.) 



Do. 

 Do. 

 Do. 

 Do. 



do 



do . 

 .do . 

 .do . 



do . 

 .do. 



-do 

 .do 

 .do , 

 .do 



Origin of 

 inoculat- 

 ing ma- 

 terial. 



Oats . . 

 ...do 

 ...do 

 ...do 

 ...do 

 ...do 

 ...do 

 ....do 



Apr. 18 i do 



Do.. do 



Do.. do 



Do.. ... .do 



Apr. 22 \ do 



Do.. do 



Do do 



Do.. do 



Do.. I do 



Do.. 



Do.. 



Do.. 



Do.. 



Do.. 

 Mav 1 



Do.. 



Do.. 



Do.. 

 May 6 

 May 7 



Do.. 



Do. 

 Do- 



Do . 



Do.. 



Do.-. 



Do.. 



Do-. 



Do.. 



Do.. 



Do.. 



Do.. 

 May 20 

 Sept. 23 

 Dec. 15 

 Dec. 21 



Do.. 



-do . 

 .do . 



.do. 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do. 

 .do . 



-do . 

 .do 



.do 

 .do 

 .do 

 .do 

 do 

 do 

 .do 

 .do 

 .do 

 .do 



.do 

 .do 

 .do 

 .do 

 -do 

 .do 

 .do 

 .do 

 .do 

 .do 

 .do 

 .do 

 .do 



. .do . 

 ..do . 

 ..do . 

 ..do 

 ..do , 

 ..do 

 ..do , 

 . .do 

 ..do 

 . .do 

 ..do 

 ..do 



.do 

 .do . 



.do 

 -do , 

 do , 

 .do 

 .do 

 .do 

 .do 

 .do 

 .do 

 .do 



Manhattan, Kans ' do 



Washington, D. U 1. ...do 



do do 



do do 



1897. 

 Feb. 12 

 Mar. 30 

 Do.. 



1898. 



Mar. 12 



Do.. 



Do.. 



Do.. 



.do 

 .do 

 .do 



! Lincoln, Nebr. 

 ' do 



do 



do 



.do 

 .do 

 .do 



.do 

 .do 

 .do 

 .do 



I'lant inociiliitfd. 



I 



liroinus unioloides 



Oata 



Hordeum jubatum 



Arrhenatheruin elatins 



LoUiim perenue 



Dartylis tjloinerata 



Amiirskii oata 



Aira cwnjiilosa 



Poa pratrn.ii.t 



Holi'ug iiiolli.i 



Feutons Kiist Proot oats . 



Eatonia up. indet 



Ligowo oats 



DactylU gloiiierata 



Koeleria cristata 



Anthoxdiitliina odoratiim. 



Festiica sp. indet 



Alopectini.s alpi'xti i'» 



I'halaris aniiidinacea 



Folypojiin inon.speUensig.. 

 Trigetuiii snbupicatum 



Poa jiiatensin 



Sporoboliis nsper 



A ira c<vfij)Uo,sa 



Brizopyrun xicidum 



Andrui o;i<ia lialapenne ... 



Ligowo oats 



Triticiiin ispelta (kMvuih. . 

 Sporobolim cii,ptandriis.. . 



J'anicKtn cnie-gaUi 



.1 niinophila arundinacea. 



Dun oats 



Avena sterilis 



Phleuiii asperum 

 Poa annua 



A inmophila arenaria 



Eatonia dudleyi 



JBrachypodium distachys 



Schedonnanhie panicuiatus 



Panic}! in cnm-galli 



Eleuiine cgyptiaca 



Erayioitis j'urshii 



Sporobolus cryptandrus 



Eragrostis abysiinica 



Tricdia cuprea 



Oats 



.....do 



do 



Antkoxanthum odoratum. . . 



Arrhenatherum elatius 



Oats 



Eatonia obtusata 



Oats 



Phalaris caroliniana . . . 

 Agrostis alba vulgaris . . 

 Arrhenatherum elatius . 



I Period I 



of incii- 



liatioii I 



'days). 



15 

 15 

 15 

 15 

 15 

 U 

 11 

 11 



11 

 11 

 11 

 11 



7 



7 



7 



7 

 11 

 11 

 11 

 11 

 11 



11 

 11 

 11 

 11 

 11 

 14 

 U 

 14 

 14 

 12 

 13 

 13 



13 

 13 



13 

 13 

 13 

 13 

 13 

 13 

 13 

 13 

 13 

 12 

 7 

 11 

 17 

 17 



18 

 12 

 12 



25 

 25 

 25 

 25 



Kesult. 



Negative. 



Succi'ssful. 



Negative. 



Do. 



Do. 

 Successful. 



Do. 

 Only one or 

 two spots. 

 Negative. 

 Doubtful. 

 Successful. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Only on(^ or 

 two spots. 

 Negative. 



Do. 



Do. 

 Doubtful. 

 Negative. 

 Successful. 

 Negative. 



Do. 



Do. 



Do. 

 Successful. 

 Only one or 

 two spots. 

 Successful. 

 Only (jne or 



two S])OtS. 



Do. 

 Negative. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Successful. 



Do. 



Do. 

 Negative. 



Do. 



Successful. 

 Negative. 



Successful. 

 Negative. 

 So. 

 Do. 



A peculiar feature of these experiments is that although the rust 

 does not seem to actually occur ou many native grasses, yet the cases 

 of successful infectious of grasses in the greenhouse are rather numer- 

 ous. Aside from the fact that some of the grasses may yet be found 

 to be hosts in nature, there are two possible explanations of this pecu- 

 liarity: (1) The inoculations were made as a rule on young plaats, 



