NOTES AND ABSTRACTS. 



341 



favours the stem that is hard, rough, and rather woody at the base, and 

 the leaf that is small, somewhat rough, and dark coloured. 



The varieties rated highest, as to disease-resistance in England, are 

 * Evergood,' 'Discovery,' 'Royal Kidney,' 4 Northern Star,' 'Sir John 

 Llewelyn,' 1 King Edward VII.,' ' Eldorado,' and 1 Factor.' 



In Germany and Holland, ' Mohort,' ' Irene,' 1 Geheimrat Thiel,' ' Pro- 

 fessor Wohltmann,' ' Boneza,' 1 Eigenheimer,' and ' Paul Kruger.' 



In America, among those which have been widely tested, the following 

 deserve mention as of the resistant class: 'Dakota Red,' 'Rustproof,' 

 ' Irish Cobbler,' 'Sir Walter Raleigh,' 'Doe's Pride,' and 'White Beauty.' 

 Certain European varieties of the disease-resistant type seem to retain 

 that character when grown in America — e.g. ' Professor Maereker ' and 

 ' Sutton's Discovery.' 



The evidence at hand seems to justify the hope that the efforts of 

 potato specialists may result in the development of varieties combining 

 general excellence with a high degree of disease-resistance. — M. C. C. 



Potatoes, Disease- resistance in. By William Stuart (U.S.A. 

 Exp. Stn. Vermont, Bull. No. 122, April 1906).— This bulletin records the 

 number of tests made since 1905. It states the object of trials to be three- 

 fold. The resistance (1) of vines to blight ; (2) of tubers to rot ; (3) of 

 the tubers to scab. It consists of tables of the trials and results. 



1. Examination of the data shows that, barring "rust-proof," all the 

 varieties showing relatively high disease-resistance were of German or 

 Dutch origin. 



2. It was found that the Dutch, German, and Scotch varieties showed 

 much less rot than did the French and American varieties. 



Note that German and Dutch varieties are not pre-eminent in qualities 

 based on commercial standards, and are not at present recommended to 

 American growers. — M. C. C. 



Potatoes, Disease-resisting". By William Stuart (U.S.A. Exp. 

 Stn. Vermont, Bull. 115, May 1905). — This bulletin gives the results of 

 tests on disease-resistance in potato vines in 1903 and 1904. In the 

 latter year the number of varieties tested was twenty-nine, and the 

 results are tabulated. The third table is occupied with disease-resistance 

 of tubers to rot, and the relation of the same to vine resistance. This 

 includes twenty-two varieties. The conclusion is that (1) some varieties 

 are less subject to vine injury than others ; (2) some show a greater 

 tuber resistance to rot than others ; (3) with some there is a fairly close 

 relation between resistance of vine to disease, and tuber to rot ; (4) selec- 

 tion has not given visible increase of resistance. — M. C. C. 



Potatoes and Potato Culture, Experiments with, for New 

 England. By F. W. Rane and H. F. Hill (U.S.A. Agr. Exp. Stn. Neiv 

 Hampshire, Bull. Ill ; plates). — An analysis, divided under ten headings, 

 of the results of some experiments carried on in New Hampshire. 



1. Beady -mixed v. home-mixed fertilisers. —There was a slightly larger 

 yield produced by ready-made than by home-made manures, but the cost 

 of the home mixture worked out at about $7.10 per acre less than the 

 other. 



