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SEED CERTIFICATION IN RADISH
SEED CERTIFICATION IN 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 seeds.
II. Land Requirements Land to be used for seed production of radish 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 after 20-30days days of the sowing I order to determine isolation, volunteer plants, off types including bolters 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 four inspections shall be made during flowering to check isolation, off types, designated diseases and other relevant factors.
IV. Field Standards
A. General Requirements
1. Isolation Seed fields shall be isolated from the contaminants shown in column 1 of the Table below by the distances specified in column 2, 3, 4 and 5 of the said Table.
|
Contaminants |
Maximum Distance (Meters) |
|||
|
Mother bulb production stage |
Seed production 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 |
5 |
5 |
1600 |
1000 |
B. Specific Requirements
|
Factor |
Maximum Permitted (%)* |
|
|
Foundation |
Certified |
|
|
*Roots not conforming to the varietal characteristics |
0.10% |
0.20% |
|
**Off types |
0.10% |
0.20% |
|
***Plants affected by seed borne diseases at final inspection |
0.10% |
0.50% |
*Maximum permitted at second inspection at mother root production stage.
**Maximum permitted at and after flowering at seed production stage.
***Seed borne disease shall be:
Black rot: (Xanthomonas campestris pv. Campestris (Pamm.) Dawson.)
Black leg(Leptosphaeria maculans (Desm.). Ces. & de Not.)
V. Seed Standards
|
Factor |
Standard for each class |
|
|
Foundation |
Certified |
|
|
1 |
2 |
3 |
|
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% |