RADISH (Raphanus sativus L.)

I. Application and Amplification of General Seed Certification Standards

             The General Seed Certification Standards are basic and, together with the following specific standards 

constitute the standards for certification of radish seed.

II. Land requirements

        Land to be used for seed production of radish seed shall be free of volunteer plants.

III. Field Inspection

    A. Mother root production stage        

    A minimum of two inspections shall be made as follows;

        1. the first inspection shall be made after 20-30days of the sowing  in order to determine isolation, 

            offtypes and other relevant factors;

        2. the second inspection shall be made after the mother roots have been lifted to verify

            the true characteristics of roots.

    B. Seed production stage 

        A minimum of one inspection shall be made during flowering to check isolation, offtypes, designated 

diseases and other relevant factors.

IV. Field Standards

A. General requirements

1. Isolation

        Seed fields  shall be isolated from the contaminants shown in the column1of the Table below

 by the distances specified in columns 2, 3,4 and 5 of the said Table:

        Contaminants                                                                    Minimum distance (meters)

                                                                     Mother root production         Seed production stage

                                                                                  stage

                                                                    Foundation        Certified      Foundation   Certified

                1.                                                    2.                        3.                 4.            5                                                                          

Fields of other varieties                                     5                       5               1600        1000                                                                                

Fields of the same variety not conforming to 

varietal purity requirements for certification

and rat-tail radish (Raphanus caudatus L.)         5                       5               1600        1000                           

B. Specific requirements

        Factor                                                                                              Maximum permitted (%)*

                                                                                                                Foundation          Certified

* Roots not conforming to the varietal characteristics                   0.10 %              0.20 %

                                                                                            (by number)        (by number)                                  

                 ** Offtypes   (Plants)                                                                  0.10 %              0.20%

               *** Plants affected by seed borne diseases                                    0.10%               0.50%   

    * Maximum permitted at second inspection at mother root production stage

  ** Maximum permitted at flowering at seed production stage

*** Seed borne disease shall be: 

       Black rot: (Xanthomonas campestris pv. compestris (Pamm.) Dawson.)

       Black leg: (Leptosphaeria maculans (Drsm.) Ces.& de Not)

V. Seed standards

        Factor                                                                               Standards for each class

                                                                                             Foundation            Certified

Pure seed (minimum)                                                               98.0%                   98.0%

Inert matter (maximum)                                                            2.0%                     2.0%

Other crop seeds (maximum)                                                   5/kg                      10/kg

Weed seeds (maximum)                                                          10/kg                     20/kg

Germination  (minimum)                                                           70%                      70%

Moisture (maximum)                                                                6.0%                     6.0%

For vapour-proof containers (maximum)                                  5.0%                     5.0%