72 Bulletin No. 159 



made by the corn worm, and would thus probably be con- 

 trolled by preventing- the injuries of the insect. 



The only other fungus observed on this corn is a dull 

 green mold which with age becomes brownish-black. Cul- 

 tures were made from this corn October 19, 1911, on Soy 

 bean agar. A Fusarium was obtained in a dense cottony 

 white growth, completely covering the slanted surface and 

 bearing numerous conidia. The pink fungus of this corn 

 did not grow, but has been isolated from corn received 

 since from the same locality. The green fungus grew 

 readily in gelatine and is a species of Aspergillus; I think 

 it only attacks kernels that have been injured by other 

 agencies. It is generally present on the gnawed kernels 

 left by the corn worm at the upper end of the ear. 



Corn sent me from London, Ky. , December 13, 1911, by 

 Mr. B. F. Johnson, is in about the same condition as that 

 observed earlier at Corbin and brought home with me. The 

 injury by the corn worm, though slight, is evident at the 

 tips of every one of the six ears in the lot, and accompanying 

 it is the pink growth on some of the kernels. The cobs of 

 these ears are mostly sound, though one is affected with 

 some fungus and shows a purple discoloration about the 

 margins of the pithy center. Some kernels on three of 

 these ears have germinated, and indicate that the corn was 

 too damp at some time, probably after being shocked. 



Another lot of six ears sent me December 14, 1911, by 

 0. W. Stamper, of Corbin, shows the same prevalence of 

 slight injury by the corn worm, every one of the six being 

 affected. Three of them have sound cobs, but show scattered 

 pink kernels, sometimes broken and crumbling. 



A large ear of this lot with thin, sharp-edged seeds 

 shows scattered brown discolored kernels, and when broken 

 a purple discoloration extending to the center of the cob. 

 I take this to be the work of a Fusarium, which in cultures 

 on sterile rice produces a cottony growth and a purple dis- 

 coloration like that seen in the cobs. It appears to be 

 associated with the pink fungus and also with Diplodia in 

 some samples. 



