664 POTATO ROT. 



might, if no disease had appeared in the course of the experi- 

 ments. If disease had appeared, the process should again be 

 repeated. 



Tiie best varieties obtained from the produce of the third or 

 second sowings, should be planted out, to furnish seed tubers, 

 with the same precautioiis as to manure, &c. 



The sound tubers should be given or sold to farmers, who 

 would pledge themselves to cultivate no other varieties, so as 

 to secure them against contagion. 



A national nursery for new varieties of potatoes, on the 

 above plan, should be kept up in every agricultural country, so 

 as continually to supply new and sound varieties. Independ- 

 ently of the prospect of gradually restoring the potato culture, 

 the improvement of the sorts cultivated, would amply repay 

 the expense. In the same farm, or garden, experiments might 

 be tried in the culture of wild varieties, obtained from the na- 

 tive country of the potato. 



The above suggestions are submitted as probably far supe- 

 rior to any founded on the belief of any one method or sub- 

 stance being effectual as a cure. Such partial remedies, though 

 they may be temporarily successful in particular soils or seasons, 

 never can effect the general or permanent removal of the evil. 



Frenciier, Smith, Broome County, N. York, believes the 

 cause a fly, secreting itself under the top leaves, laying in the 

 stalk a nit, which becomes a small worm, descending in the 

 stalk, which soon begins to turn black and die. Cure. — Scat- 

 ter plentifully over the leaves, while they are covered with a 

 heavy dew, in dry weather, slacked lime; and repeat the same 

 if necessary. Frequent experiments have proved this unfailing. 



Flournoy, J. F., "Nigh Athens,'' Georgia (two communica- 

 tions). Cause. — "Moist soils." Cure. — Take 1 bushel slacked 

 lime, 5 bushels soot, 1 quart alum, 1 pint ammonia, mix and 

 apply a due proportion to each hill, on a quarter or an eighth 

 of an acre, according to the moisture or dryness of the soil. 



Franz, J. Hahn, Kutytown, Berk County, Pa., seems to 



