SEED PRODUCTION IN PERENIAL FODDER SORGHUM
|
Land Requirement
Land shall be free of volunteer plants including sudan grass.
Field Standards
A. General Requirements
Isolation
- Isolation: Fields shall be isolated with following specified isolation distances.
Contaminants |
Minimum distance (meters) |
Foundation |
Certified |
Fields of other varieties of grain and dual-purpose sorghum |
200
|
100 |
Fields of same variety not confirming to varietal purity requirements |
200 |
100 |
| Johnson grass (Sorghum halepense (L.)) and other grassy Sorghum spp. |
400 |
400 |
Perenial Fodder Sorghum
B. Specific requirements
Factor
|
Maximum permitted (%)* |
Foundation |
Certified |
| Off-types at any one inspection at and after flowering |
0.10 |
0.20 |
| *Heads infected by Kernel smut or Grain smut (Sphacelotheca sorghi) and Head smut (Sphacelotheca reiliana) at final inspection |
0.050
|
0.10 |
*Seed fields can be certified if diseased earheads are removed and burnt and on re-inspection, infection is below than maximum permissible level.
Only one such re- inspection is permitted.
|
Note:
- Seed fields should be thoroughly rogued for sugary disease/ergot infected plants so as to meet the seed standards.
- However, seed fields shall not be rejected for presence of sugary/ergot infected heads.
- Seed rate : 5 kg/ha
- Seed treatment : Treat the seeds with 600 g of Azospirillum and 600g of Phosphobacteria or 1200g of Azophos.
- Spacing : 50 x 20 cm
|
Seed Standards
Factor |
Standards for each class |
Foundation |
Certified |
Pure seed (minimum) |
97.0% |
97.0% |
Inert matter (maximum) |
3.0% |
3.0% |
Other crop seeds (maximum) |
5/kg
|
10/kg
|
Weed seeds (maximum)
|
5/kg
|
10/kg
|
Other distinguishable varieties (maximum)
|
10/kg
|
20/kg |
Ergot (Claviceps spp.) sclerotia, seed entirely or partially modified as sclerotia, broken sclerotia or ergotted (Sphacelia sorghi & Claviceps spp.) seeds (maximum) |
0.020%
(by no.)
|
0.040%
(by no.)
|
Germination (minimum)
|
75%
|
75% |
Moisture (maximum) |
12.0%
|
12.0%
|
For vapour-proof containers (maximum) |
8.0% |
8.0% |
|
Source
The Professor and Head
Department of Seed Science & Technology
TNAU, Coimbatore-641003.
Phone:0422-6611363
Email: seed@tnau.ac.in
|
|
|
