

64 



The Florists' Review 



.lui.r 13, 1922 



seeds, if these proved not satisfactory. 

 In the meantime this firm made a test 

 and got a result of ninety per cent, and 

 wrote back saying that the seeds were 

 satisfactory. The test on these seeds 

 was then cliecked up by several soil 

 tests and tlie soil tests ranged between 

 seventy per cent and seventy-five per 

 cent, checking the blotter test. If the 

 situation h;ul been reversed, there 

 would have been considerable contro- 

 versy. The variation caused by abnor- 

 mal sprouts is, of course, not usually so 

 striking. It is a (piestion of what de- 

 gree of abnoriiiiility is harmful and 

 therefore must l)e considered; liere a 

 good botanical background, a knowl- 

 edge of jdant structure, development 

 and requirements, is essential. Any- 

 body can do gcntiiiiation, but can he 

 do it intelligently? 



Results of Mold. 



Mold, the other external factor in ab- 

 normality, is always ])resent, of course, 

 but becomes important only in seeds 

 that arc on tlie downward track. The 

 mold problem has perhaps been a trifle 

 overdrawn. With normal care and nor- 

 mal measures to prevent infection, there 

 should not be much trouble with mold. 

 Good seeds will germinate rapidly 

 enough so that the mold Avill not have 

 an opportunity to become injurious. 

 Most of the seeds that are badly at- 

 tacked by mold are those that are bad 

 to begin with. There are eases, of 

 course, where infection can ruin a test, 

 but normal ])recautions should eliminate 

 most of them. The contact of seeds 

 during germination should be i)re- 

 vented, if it is at all possible. With 

 this in view we have used the new 

 method of germinating peas, and seeds 

 of like nature, which roll from their 

 relative jjositions in the blotters and 

 spread mold by contact. Blotters are 

 used instead of cloths. A double blot- 

 ter is folded twice, so that there is a 

 double thickness of blotter under the 

 seed and a fourfold thickness on top. 

 The inside blotter is then jierforated or 

 scratched to roughen its surface, mak- 

 ing fifty ])erforatioiis. The seeds are 

 ]>ut into these ]iert'orations and in this 

 w;iy :ire kejit in jilace. with the result 

 that few of the si'cds ever roll together. 

 This arrangement prevents considerable 

 mold infection, by eliniin.'iting contact 

 of seed. 



Considering' the above problem, one 

 would come to the conclusion that the 

 variations one gets in tests are gener- 

 ally the result of ^•ariation in mold in- 

 fection and \ ;iriation in bad sprouts. 

 Temperature and moisture are imjior- 

 tant factors, but only in cases of poorly 

 equipped laboratories. The right kind 

 of laboratory li;is ;it least ;i fair mois- 

 ture and temperature control. There 

 is one more factor, however, which the 

 commercial analyst meets, which is en- 

 tirely beyond laboratory control; 

 nameh^, mi.xture of seed. This may con- 

 sist of eitlicr a variation found in dif- 

 ferent parts of a field — certain parts of 

 a field produce seeds of good germina- 

 tion and other parts seed of lower ger- 

 mination- — or it may be a mixture made 

 by the grower or dealer from whom the 

 seeds are bought. A good lot of the 

 seeds may have a bag or several bags 

 showing a much lower germination — a 

 ease where old seed lias been mixed with 

 new seed. This necessitates bag tests 

 (HI all lots of seeds bought. Composite 



i( ■■liliiiiicil 1)11 paiJc 101.) 



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Mention The Review when you write. 



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GLADIOLUS SPECIALIST 

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