104 



?\'rctri(i fpiiiii(i(r Ilnls.' has l)i'on olisci'votl in the vicinity of Blooming- 

 ton, hid., hy I'ruf. J. M. Vnn Hook, ot Indiana T'niversity. It is sni)- 

 jiosed to cause a stem and root rot of sweet potatoes in the tield, a root 

 rot in storage, and a stem rot of egg-phtnt in the field. 



Penicillium spji. The iirevaleiice of these fungi renders their attacks 

 freQnent. They are usually superficial. Itut may. however, penetrate more 

 deeply, especially under conditions of considerahle moisture. A wound of 

 some sort is usually a further ne<-essity fir such an infection. 



IHdli'irllic hdldhiUs IIarti>r and Field. This is the organism originally 

 descrihed as I'lioimt lint<ilt( Ell. and Hals." Harter and Field have recent- 

 ly secured (lie ascigeious stag" and have named the organism.' It was Iso- 

 lated several times from sweet jxitatoes raised in Tippecanoe County. The 

 culture was deternnned hy ^Ir. L. L. Ilarter. of the Bureau of I'l.int In- 

 dustry. This a])pears to lie the first time the species has been reporteti 

 in Indiana. It is not listed in the report of the Biological Survey of the 

 Academy in \\\v IMciceedings for ISOH, nor, so far as I have been able to 

 find, in the additions since. 



Sjili'iroru'iiKi fiiiihridtiiiti ( I'Jl. and II.-iis.) Sacc, This oiganism causes 

 (he disc.-ise known as "black shank." It was not found during the course 

 of this work, but was reixirted in the T.KiT Yearbook of the Department of 

 Agriculture as havin.g been iirescnt in this state during that year. 



I'liNdridin spp. During the coui-sc of the woi k several species of 

 /■'iisdiiiiiii were isol.ated and studied. Some sitecies are conunon members 

 of the flora of decaying sweet jiotatoes. and the results indicate that oue 

 or more of them is partially resiionsible for the decayed condition. How- 

 ever, as the point has not bi'en fully d(>monstr;it<'d. it si-ems best not to dis- 

 cuss it more full.x here. 



'ITal-;f('(l. v.. I). Til.' i:-^-iiIant St.'iii Itot. X. .T. Kxp. Sta. Uci)f. 12. iip. '-'SI 

 28.*?. 1 Si) 1 . 



= Ilalstcd. U. I>. Sol, 11' Fi!ii,;,'oiis Kiscascs of (ho Sweet I'olafo. N. .T. lOxj). 

 Sla. Bull. 76, PI). 2:i-2.^. 1800. 



•' Ilarter, I,, b.. aiul I''iel(l. Klhel ('. Diaportho, the Ase()-.reni)iis Form of Sweet 

 I'olato Dry Kot. I'liytopatliolojiy. Vol. II, No. 3, pp. 121-124. .Tiin<>, 1912. 



•* Ilalstod, B. I>.. and Fairehlld. D. (J. Sweet Potato Black Kot. .Tour. Mye. 7. 

 pp. 1-11, pis. 1-3. 1891. 



Ilalstocl, B. D. Some Kuugous Diseases of the Sweet Potato. .\. .1 K.\p. Sta. 

 Bull. 7<j, pp. 8-14. 1890. 



