Field standards

Field Standards

Table 1 : Field standards by Tunwar and Singh, 1988
Factors
 
Maximum permitted limits
 
Foundation I
Foundation II
Certified
Offtypes
0.05%
0.05%
0.10%
Mid mosaic
1.00%
2.00%
3.00%
Severe mosaic
0.50%
0.75%
1.00%
Leaf roll and other yellows
1.00%
2.00%
3.00%
Total virus
1.00%
2.00%
3.00%
Brown rot
None
Up to 3 plants per hectare
Up to 3 plants per hectare

Factor
Stage
Off types
Just before haulm cutting
Mid Mosaic
About 45 days after sowing
Root knot nematode
Just before haulm cutting
Brown rot
Just before haulm cutting
Scab
Just before haulm cutting
Wart
Just before haulm cutting

Last modified: Tuesday, 8 November 2011, 9:27 AM