448 EXPERIMENT STATION RECORD. 



Studies on bacterial disease of peanut, A. W. K. de Jong {Dept. Landh., 

 Nijv. en Handel [Dutch East Indies], Meded. Agr. Chem. Lah., 1913, No. 3, 

 pp. 56-59). — These experiments were carried on in 1912-13. 



Sulphiur added to the soil showed little or no practical benefit. Attempts 

 to breed a more resistant variety gave a measure of success, but seeds from 

 the few plants which had recovered from the disease appeared to have been 

 weakened as they yielded readily to attack. Keeping water standing around 

 the plants from 1 to 4 weeks showed no good effect as prevention against bac- 

 terial disease. 



On the nomenclature of the organism causing corky or powdery scab in 

 the potato tuber, Spongospora subterranea, G. H. Pethybridge (Jour. Roy. 

 Hort. 8oc. [London], 38 {1913), No. 3, pp. 524-530).— A discussion is given 

 of the nomenclature of the fungus causing the powdery scab of potatoes. The 

 author claims that under International Rules the name should be S. subterranea. 



Powdery scab of potatoes, Spongospora subterranea, H. T. Gussow {Phyto- 

 pathology, 3 {1913), No. 1, pp. 18, 19, pi. 1, fig. 1). — The author reports having 

 received from various localities in Canada samples of potatoes affected with 

 powdery or corky scab {S. subterranea) . Subsequent investigations have shown 

 that this disease is present in some of the counties of Quebec as well as in 

 isolated localities in Cape Breton, Nova Scotia, New Brunswick, Ontario, and 

 Alberta. 



Powdery scab of potatoes in the United States, W. J. Morse {Science, 

 n. ser., 38 {1913), No. 967, pp. 61, 62). — Attention is called to the occurrence 

 of the powdery scab of potatoes, due to Spongospora subterranea, reported in 

 Canada by Gussow (see above). In connection with studies on potato scab, 

 the author obtained material from a number of localities, and upon thorough 

 examination the spore balls of S. subterranea were found in the material 

 received from Massachusetts and Nebraska. While there is no conclusive evi- 

 dence that the powdery scab exists in other parts of the United States, the 

 fact that it was obtained from two widely separated localities indicates that 

 it may be quite generally distributed and possibly a factor in the cause of 

 potato scab in this country. 



Wart disease of potatoes, G. T. Maxthouse {Field Expts. Harper-Adams 

 Agr. Col., and Staffordshire and Shropshire, Rpt. 1912, pp. 26-29, pis. 2). — 

 Continuing work with potatoes previously noted (E. S. R., 24, p. 648), the 

 author gives, along with statements as to quality, some numerical and graphi- 

 cal comparisons as to yield and as to resistance toward disease. 



Of the early varieties none are recommended, and but two of the second 

 early. A considerable number of main crop varieties were found to be resist- 

 ant, but only a few were found to be suitable to general planting. Great Scot 

 is said to be the best of the varieties grown. Only a few continental varieties 

 proved to be resistant. Instances of possible sporting were noted, only a few 

 plants per row of some kinds shoeing susceptibility to wart disease. Seed from 

 these are to be further tested. The numerous fungicides tested either failed 

 to arrest the development of the fungus or destroyed the potato crop in every 

 case. The cultivation of tubers from seedlings was carried forward (a number 

 of these being planted out), as was also the experimentation in hybridization. 

 In case of varieties planted in duplicate at the college grounds and at Stanton, 

 it was often found that a kind sterile at one place produced abundant pollen 

 at the other, or vice versa. Tests with several annual exotic Solanums resulted 

 in no infection by wart disease on any other species of the genus. 



To test the possibilities of cnttivation, on one plat the potatoes were planted 

 in the usual way in the top layei* of soil. On a second this top layer was 



