742 EXPERIMENT STATION EECORI>. 



experiments looking to tlie best methods of controlling some of tlie common 

 diseases of plants, and analyses of seed under the state seed law, have been 

 undertaken and are here reix)rted. 



Greenhouse tests of seed from bolls attacked by cotton anthracnose have 

 been followed by the appearance of the disease, while healthy seed planted 

 on land previously grown to peas and oats last year, but planted to diseased 

 cotton the previous year, gave plants entirely free from anthracnose. These 

 experiments, it is claimed, demonstrated that the disease is carried in the 

 seed, and can be eliminated by the use of clean seed and a one-year crop rota- 

 tion. Many fields were found infested with anthracnose for the first time 

 where the source of infection was traced to the use of diseased seed. 



In experiments with the sweet iwtato rots, 100 bu. of potatoes harvested in 

 November were immediately put into slatted bins 3 by 4 feet in a well-ventilated 

 house, and the temperature kept at from 70 to 90° F. for 2 weeks, when the 

 house was closed, and the temperature kept at from 50 to 60° during the 

 rest of the winter. None of the common storage rots, such as Rhizopus, Mucor, 

 Peuicillium, and Fusarium, occurred, but black rot, with which the potatoes 

 were already affected when stored, and a Nectria rot caused much damage, 

 and by the first of April had destroyed the majority of the lot. It seems from 

 this experiment that if the potatoes are sound and healthy when dug, this 

 method of storage will prove a success. 



Plant disease survey of South Carolina, H. W. Barre (South Carolina St a. 

 Rpt. 1910, pp. 29-39). — In this progress report the distribution throughout the 

 State by counties is given of the more common diseases of economic plants. 



Plant diseases due to fungi, W. E. Collinge (Rpt. Econ. Biol., 1 {1911), 

 pp. Jtl-ol, figs. 7). — ^The author reports the prevalence, damage done by, and 

 means of control of, the following diseases of economic plants : Brown rot 

 (Sclerotinia fructigena) ; apple scab {Venturia inequaUs) ; gooseberry sclero- 

 tinia {8. fnclceliana) ; sleepy disease of tomatoes (Fusarium lycopersici) ; wilt 

 disease of tomatoes and cucumbers (Mycosphwrella citrullina) , a hothouse dis- 

 ease which is proving very injurious and becoming more prevalent each year ; 

 potato scab (Oospora scaMes) ; yellow wart disease of potatoes (Synchytrium 

 solani) ; finger-and-toe disease (Plasmodiophora hrassicw) ; bean anthracnose 

 (Colletotrichm)i llndcmiithianum) ; iris leaf blotch (Heterosporium gracile) ; 

 hyacinth yellows (Pscudonwnas hyacinthi) ; and Ornithogalum black mold 

 (H. ornitJiogali). 



New species of Texas fungi, F. D. Heald and F. A. Wolf (Mycologia, 3 

 (1911), No. 1, pp. 5-22). — Descriptions are given of 41 new species of fungi, 

 principally on economic plants, collected in the vicinity of San Antonio, Texas. 

 Of the 12 genera represented, one belongs to the Ascomycetes (Dimerosporium 

 parlcinsonice) , and the remainder are imperfect fungi. 



A preliminary note on the life history and cytology of Spongospora sub- 

 terranea, T. G. B. Osborn (Ann. Bot. {London^, 25 (1911), No. 97, p. 271).— As 

 a result of investigation the author concludes that the genus Spongospora 

 should be grouped with Plasmodiophora, Sorosphsera, and Tetramyxa in the 

 family Plasmodiophoracete. 



Contribution to the study of sooty molds, G. Aenaud (A^vn. Ecole Nat. Agr. 

 Montpellder, n. ser., 9 (1910), No. Jf, pp. 239-277, pis. 3, figs. 3).— In a further 

 study (B. S. R., 24, p. 152) of these fungi, the author discusses the habitat, 

 mycelium, fructifications, and taxonomic position of Pleo splicer ia citri, P. pata- 

 gonica, and Calicium populneum. 



A bibliography is appended. 



A new parasitic fungus found in the roots of grasses, E. J. Schwabtz 

 {Ann. Bot, [Lonaon], 25 (1911), No. 97, p. 270).— In a brief preliminary note 



