Hybrid Brinjal

Land Requirements

No Specific requirements. Land should be free from volunteer plants.

Isolation Requirements

Brinjal is partially self- and corss-pollinated , but self-pollination is more common. The extent of natural corssing depends upon insect activity and has been recorded from 0to 48 per cent.
For pure seed production, seed fields must be isolated from other variety brinjal fields, and fields ofsame vareity not conforming to varietal purity requirements of seed certification at least by two hundred metres for foundation seed production, and one hundred metres forcertified seed production.

Cultural Practices

Time of Sowing

Plains : February to March, June to July, October to November
Hills : March to April

Preparation of Land

For transplanting prepare the field to a fine tilth by ploughing and 3to 4 harrowings followed by leveling.

Source of Seed

Obtain breeder's/foundation seeds from source approved by a seed certification agency.

Seed Rate

375 to 500 gms per hectare.

Sowing of Seeds in Nursery

Seeds may be sown on raised nursery beds. (15 to 20 cms high from the ground) inrows 2to 3cm apart. 25 nursery beds of size 2 to 2.5 meters long and 1 to 1.25 metres wide will raise enough seedlings to transplant one ha.

Fertilisation

Apply 20 to 25 tonnes of well-rotted farmyard manure at the time of land preparation; and 300 kg of Superphosphate, 125 kg potassium sulphate and 250 kg of amonium sulphate or C.A.N. before transplating .. Top-dress 250 kg ammonium sulphate or C.A.N. in two doses. the first fifteen days after transplanting, and the second at flowering time spread around the plants. Irrigate immediately after top-dressing.

Transplanting

Transplant the seedlings, when 12 to 15 cms in height, preferably at evening time. Irrigate immediately afterwards.

Spacing

(a) Non-spreading types: 60 x60 cm between rows and plants.
(b) Spreading type : 75 to 90 x 60 to 70 cm..

Irrigation

Irrigate at two weeks interval during the summer

Interculture

Keep the fields free from weeds, and the soil well aerated by frequent hoeings.

Insect and Disease Control

Adopt recommended IPM methods

Roguing

Remove the offtypes.

Harvesting and Extration of Seeds

Harvesting is done when fruits are fully ripe. the fruits are picked and collected. The outer covering is peeled off and the flesh with the seeds is cut into thin slices. These are then softened by soaking till the seeds are separated from the pulp. If the material is allowed in this condition tostand overnight, the separation of seeds from the pulp becomes easier.
After separation, the seeds are dipped into water. those which float should be rejected. the seeds should then be dried in partial shade to a moisture content ofeight percent below, before storing.

Seed Yield

The average seed yield is about 100 to 200 kg per hectare.

Hybrid Seed Production

In producing the hybrid seed, thevariety setting the large number of seeds in a single fruit should be takne as the female parent, so that a large amount of seed could be obtained in a single attempt.
The flower buds which are expected to open the next day are selected on the female parent. With the help of forceps the flower buds are opened and the stamens, the number ofwhich varies from five to seven, are removed one by one. Thisprocess of removing the stamens is called "emasculation". The emasculated buds are then bagged in butter paper or muslin cloth bags to prevent pollination with the undesirable pollens. While emasculating the flower, care should be exercised that no anther is reptured or crushed. If it happens, such flowers should be rejectedand the forcep should be sterilised with spirit or alcohol.
The flower buds of the male parent should also be bagged to avoid contamination. Next day in the morning, the flowers which were bagged for taking the pollen grains are plucked and collected in a petridish. The female budsare then uncovered. Theanther from the male flower isremoved and is held in between the arms of the forceps. As the pollen grains in the anthers of brinjal are released through apical pores, the anther is held perpendicular to the stigma surface, keeping the apical pores of the anther opposite to the stigma surface. the forceps are tapped and the yellow coloured powder of pollen mass is dusted on the stigma. This process of dusting the pollen grains on the stigma is known as 'Pollination'. the pollinated buds are again bagged to prevent corss-pollination.
The emasculation and pollination can be done simultaneously. However, thesuccess in fruit setting when this method is followed is marginally reduced, but the labour and time required, for bagging the emasculated buds and unbagging them the next day for pollination is effectively saved. The emasculated and unpollinated buds and male buds are tagged with tags of different colours so that each set of buds can be distinguished with the help of the colour of the tags.



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