244 EXPERIMENT STATION RECORD. [Vol. 43 



fmiL'iis { h'hi.iocfiiinii rioUiciit) \ viiit's, iiiitlii'iKiiDsc .-lud (>i(limii; ciilil);!;^!', cliih 

 roni ; ;iii(l tniiiato, Ii-isli l)lij;lif, sli'ojtiiig sickiioss, and Sciitoriu h/toiicrsiri. 



Plant pathology | New Z«'alaii(l, 1<J18-1!)|, A. H. Cockaynk (Arif Zial. 

 Dcijt. At/r., Indus., and Com. Ann. Rpt. 1<US-1<), pp. .'ft, Ji2). — It has been shown 

 that a funj^ns attacking younj^ rootlets of tiax causes destruction of the plants 

 only when they have been weakened by adverse soil conditions. The peculiar 

 feature noted for two seasons is tlie recovery of affected plants during the late 

 autumn and wii ter foUowed by a lecrudescence or return of the disease during 

 the following summer. Artiticial manures do not appear to have any marked 

 effect on yellow leaf. 



Dry rot of s\\edes, which is becoming very destructive, is being studied. Cer- 

 tain rapidly acting manures, as superphosphate, apparently increase the disease. 

 Swedes growing slowly appear to suffer less than tho.se which grow rapidly. 

 Inoculation experiments have shown that swede dry rot is capable of infecting 

 all classes of turnips and swedes. 



A new species of liotrytis has been shown to cause rapid rotting of apples, 

 especially from the eye end. Spores of the fungus appeared to be incapable of 

 causing infection. 



Grass rusts of unusual structure, J. C. Aktiiuu and E. R. INIains {Bui.- 

 Torrvy Bot. Club, 1,6 {1919), No. 10, pp. ffll-Jfl5, fifjs. 2).— Comparisons as here 

 drawn show especially striking resemblances among the tropical rusts Uredo 

 iyntiva on Bambos, Puccinia palhi^ccns on Tripsacum, and P. phukopsoroides 

 on Olyra, the la.st-named being described as a new species. The telia of the tirst- 

 namt'd species have not been found, but they are expected to resemble those of 

 the other two species. 



Seed treatment [against stinking smut], H. C. MiJLLER and H Molz {Deut. 

 Landir. Presse, Jf-5 {1918), No. 82, p. 509). — This is an account of comparative 

 tests made in 1918 with a proprietary preparation for treating si-ed grain for 

 protection against stinking smut. 



Control of cotton anthracnose and iniiirovenient of cotton in North 

 Carolina, R. A. Jehle and R. Y. Winters {Bui. N. C. Dept. Agi:. J,l {1920), No. 

 2, pp. lJf-28, figs. 5).- — Work done by the authors and cooperating county agents 

 shov.'s that cotton anthracnose or boll rot, probably the most destructive local 

 cotton disease, occurs in every part of the State where cotton is grown, causing 

 more or less damage to the cotton crop every year. An account is given of the 

 first appearance and subsequent progress of the disease, and injury caused 

 thereby in the State. This disease is sometimes confused with the bacterial 

 boll rot. 



Control of cotton anthracnose is based upon the fact that the causal fungus 

 may live at least one year in the soil on decaying fragments of cotton plants, 

 and the second fact that seed from disea.sed bolls are almost certain to become 

 infected. The corresponding control measures are rotation and careful manage- 

 ment of seed at public gins. Seed improvement measures are dealt with in 

 some detail. 



Control of cotton wilt, R. A. Jehle {Bui. N. C. Dept. Agr., 41 {1920). No. 2, 

 pp. 5-13, figs. 6). — It is stated that cotton wilt, unlike anthracno.se, is not dis- 

 tributed all over the State, but is limited to certain localities, sometimes even 

 to certain farms. It is most prevalent and destructive in the coastal plains 

 region of the State, being present in 22 counties. A fungus causing the wilt 

 di.sease lives in the soil and is spread by agricultural implements, the feet of 

 men and animals, and running water. It is usually more destructive and 

 prevalent during the wet season, as the cotton plant is less able to resist the wilt 

 during the period of rapid growth. The most uniformly satisfactory results 

 as regards resistance is given by the variety Dixie, which is described. Wilt 



