DIVISION OF HORTICULTURE 



311 



SESSIONAL PAPER No. 16 



remained stationary in growth. These affected plants did not produce any saleable 

 tubers. Samples of the injured plants were sent from time to time to the Division 

 of Botany, Central Experimental Farm, Ottawa, Canada, and Mr. Eastham made two 

 personal visits during the season to the field. Upon investigation it was found that 

 seed from this cellar had proved worthless for seed in former years. There were 

 several inquiries from farmers describing a similar trouble in their potato fields. 

 Xothing definite has yet been learned except that all of the seed potatoes obtained 

 from other sources and planted at this Station were free from the trouble. 



In the table that follows, the varieties of potatoes numbered from 1 to 8 were 

 obtained from outside sources. Nos. 9 to 28 were all kept in the cellar referred to, at 

 a low, almost constant, temperature. Conditions seemed as good as they could be made. 



It will be noticed that some varieties were much more resistant than others. The 

 number of vigorous plants in each case is given, in the computed area. In the second 

 part of the table the results are computed from 66 actual stalks, dug from a continua- 

 tion of the same row, in order to obtain the number of vigorous plants there should 

 have been in the measured area. 



The seed was cut in four, being split from end to end and then across the middle 

 of the potato. The plants were sprayed regularly every ten days throughout the grow- 

 ing season with Bordeaux containing Paris green. 



The land was a sandy loam, well manured with stable manure, which was worked 

 thoroughly into the land two weeks before the seed was planted. The yield per acre 

 was computed from the weight of one row 66 feet long. The sets were planted on May 

 22, and the tubers dug on October 7. K"o rot was found in any of the varieties. 



Potatoes. — Test of Varieties. 



Name of Variety. 



1. Lion's Paw , 



2. Table Talk 



3. Ovwell Square 



4. y itzgerald 



5. Wee McGregor 



6. Green Mountain, 



7. Sclina Burbank 



8. White Rose 



9. Mcfntyre 



10. Gold Coin 



11. Dreer's Standard . . . 



12. Yiek's Extra Early. 



13. Empire State 



14. Ash leaf Kidney 



15. Carman 1 No. 1 



in. Rwhester Rose 



17. Rural New Yorker. 



18. Everett 



10. American Wonder. . 

 2 ■. Irish Cobbler 



21. Hard to Beat 



22. iJurbank's Seedling 



23. Late Puritan 



2 !. Factor 



25. Up to Datp 



20. Sutton's White City 



27. Mon^y Maker 



28. Morgan's Seedling. 



No. of 

 Vigor- 

 ous 

 Plants. 



59 

 42 

 58 

 54 

 58 

 54 

 46 

 60 

 41 

 44 

 54 

 47 

 37 

 31 

 40 

 31 

 39 

 31 

 19 

 21 

 29 

 24 

 20 

 26 

 43 

 23 

 14 

 9 



Total 

 Yield. 



Bush Lb 



519 

 510 

 492 

 443 

 428 

 421 

 407 

 368 

 450 

 442 

 439 

 416 

 345 

 314 

 335 

 273 

 267 

 252 

 233 

 232 

 222 

 184 

 168 

 168 

 108 

 146 

 123 

 119 



28 



15 



56 



18 



4 



09 



41 



06 



12 



2S 



19 



24 



57 



Part T. 

 Results computed 

 from 1 ' 264 acre — 



Market- 

 able. 



484 

 439 

 458 

 413 

 402 

 373 

 393 

 336 

 391 

 119 

 393 

 386 

 305 



41310 

 46284 

 25 227 

 18'23fi 



02 

 55 

 38 

 20 

 47 

 42 

 26 



225 

 200 

 185 



172 

 144 

 155 

 117 



18 101 



34 110 



20'l09 

 04 77 



Un 



market- 

 able. 



Part II. 



Results computed from 66 



vigorous plants- 



Total 

 Yield. 



Bush. Lb. Bush. Lb.! Bush. Lb. 



I 



08135 

 57 70 



17 

 36 



36 

 02 

 5! 



34 

 29 

 26 

 48 

 13 



2931 

 19 58 

 22 23 



07 



44 

 43 

 43 

 29 

 01 

 55 

 30 

 12 

 01 

 58 

 55 

 22 

 01 

 53 

 49 

 35 

 49 



46 

 29 

 40 

 33 

 51 

 46 

 30 

 26 

 33 

 47 

 49 

 39 

 13 

 51 

 66 

 35 

 13 

 41 



20 

 24 

 39 

 42 

 07 

 07 

 45 

 37 

 53 

 06 

 12 

 40 

 09 

 58 

 17 

 24 

 23 

 32 

 41 

 34 

 22 

 52 

 20 

 25 

 25 

 45 

 45 

 15 



556 

 683 

 536 

 493 

 493 

 484 

 186 

 374 

 643 

 530 

 4-3 

 500 

 506 

 556 

 483 

 381 

 361 

 457 

 592 

 348 

 276 

 403 

 526 

 290 

 272 

 260 

 428 

 5S0 



19 

 22 

 47 

 37 

 20 

 41 

 28 

 08 

 21 

 06 

 12 

 55 

 08 

 03 

 02 

 33 

 12 

 02 

 37 

 50 

 38 

 00 

 45 

 24 

 56 

 59 

 13 

 48 



Market- 

 able. 



Un- 

 market- 

 able. 



Bush. Lb. Bush. Lb. 



519 



600 

 501 

 465 

 463 

 435 

 145 

 342 

 578 

 505 

 439 

 467 

 403 

 508 

 434 

 335 

 327 

 397 

 528 

 200 

 211 

 330 

 407 

 215 

 168 

 199 

 398 

 490 



