Rape and Mustard
Land to be used for seed production of rape seed and
mustard shall be free of volunteer plants. the selected field should be
well-levelled and the soil suitable for cultivation of the crop.
Indian minimum seed certification standards
prescribe a ;minimum isolation distance of 100 metres and 50 metres for
foundation seed class and 50 metres and 25 metres for certified seed
class, for self incompatible and self compatible types respectively,
from fields of other varieties of the sampe species, and fields of the
same variety not conforming to varietal purity requirements of
Preparation of Land
Usually one ploughing three to four harrowings,
followed by levelling, are sufficient to prepare land tosedired tilth.
toria in particular requires a fairly moist seed bed for good germination.
Source of Seed
Obtain breeder's/foundation seeds from source approved
by a seed certification agency.
5 to 8 kg per hectare.
Method of Sowing
Seed crop should be sown in rows. the depth of seeding
should not be more than 3 cm.
Row to row : 30 cm
Plant to Plant : 7.5 - 10cm
One presowing irrigation and one at flowering and pod
formation is recommended forobtaining higher seed yields.
One hand weeding when the plants are 15 to 20cm high is
Insect and Disease Control
Adopt recommended IPM methods
All the off-type plants, easily distinguishable on the basis of
plant characteristics, and other species plants must be removed before
flowering to ensure pure seed production. Remaining off-types, if any,
distinguishable on the basis of siliqua characteristics should be
removed beforfe maturity. Satyanashi (Argemone mexicana) is the most
objectionable weed in rape and mustard seed production. This weed must
be removed altogether as often as required.
Harvesting and Threshing
It is important to harvest seed crop soon after plants start turning a
light yellow. At this stage most of the siliqua are light yellow and the
seed inside the siliqua light brown. After harvesting, the crop should
be left in the field in small bundles for two to three days to dry in
the field, or the bundles may be brought to threshing floor and
completely dried there. After plants have been well dried, threshing can
be done by bullocks, tractor or flailed with sticks. Before storage, dry
seeds to reduce moisture content to eight per cent.
With good management crop yields upto 15 to 20 qtl per
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