196 RURAL MICHIGAN 



other pests to such an extent as to make identifica- 

 tion difficult are disqualified. To pass the bin 

 inspection, potatoes must show freedom from scab, 

 black-scurf and late blight, not have over 10 per 

 cent of light or 2 per cent deep infection of wilt, and 

 be free from other diseases and from frost-injury. 

 Potatoes in the bin must show not over 1 per cent 

 of varietal mixture and must conform to varietal type, 

 be uniform, symmetrical, smooth, and practically free 

 from serious cuts, fork punctures, bruises and other 

 mechanical blemishes. There are also limitations on 

 weight. Potatoes are sold in clean bags holding one 

 hundred pounds and bearing the certification tag of 

 the Association. For the purpose of introducing 

 certified seed potatoes into new localities and of 

 determining results from the use of such seed, the 

 Association furnishes certified seed to growers for 

 such demonstrations, and it publishes lists of growers 

 of certified seed, which, in 1920, bore thirty-seven 

 names, of whom eight were in- the Upper Peninsula.^ 

 Michigan beans, grown in the southern counties, 

 have an established reputation and have been a highly 

 favored money crop. The output in 1910 was 

 5,282,511 bushels, chiefly from the counties of Clin- 

 ton, Eaton, Genesee, Gratiot, Huron, Ingham, Ionia, 

 Isabella, Kent, Lapeer, Livingston, Macomb, Mid- 

 land, Montcalm, Saginaw, Sanilac, Shiawassee and 

 Tuscola, each of which produced more than 100,000 

 bushels. There is a tendency for the counties impor- 



^ From statement and pamphlets furnished by the Secre- 

 tary of the Mich. Potato Producers Assoc. 



