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Table 4. Visual root scores for wheat grown at three locations in southwestern North Dakota, 1997.

  --Root disease rating1--    
Treatment Five leaf stage Soft dough stage Color index2 Root mass3
Beach        
Fumigated 0.333 0.356 1.667 3.167
Natural 0.493 1.000 2.333 2.667
Mean 0.413 0.678 2.000 2.917
CV% 29.8 33.5 20.4 21.0
LSD.10 NS 0.542 NS NS
         
Amidon        
Fumigated 0.537 1.263 2.000 2.500
Natural 0.737 1.501 2.750 2.125
Mean 0.637 1.382 2.375 2.313
CV% 34.3 33.9 14.9 7.64
LSD.10 NS NS 0.588 0.294
         
Pick City        
Fumigated 0.460 1.038 2.375 2.500
Natural 0.489 1.460 3.000 2.625
Mean 0.475 1.249 2.688 2.563
CV% 20.5 22.4 16.6 13.2
LSD.10 NS NS NS NS

1 Root disease rating, 0 to 4 for sub-crown internode. 0 = no infection, 1 = less than 25% of internode infected, 2 = 25 to 50% of internode infected, 3 = 51 to 75% of internode infected, multiple lesions, and 4 = 75 to 100% of internode infected, lesions coalesced.

2 Root color index at soft dough stage, 1 to 4. 1 = white and 4 = dark brown.

3 Root mass rating at soft dough stage, 1 to 4. 1 = few roots and 4 = substantial root system.


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