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Crop Production :: Pulses :: Field Lab-Lab
Field Lab-Lab (Mochai) ( Lab lab purpureus (L.) var. lignosus )
Blackgram   

SEASON AND VARIETIES

DISTRICT/SEASON   VARIETIES
All districts except The Nilgiris   Co 2
All through the year

DESCRIPTION OF MOCHAI VARIETIES

Particulars   Co 2
Parentage   Derivative of Co 8 X Co 1
Year of release   1984
50% flowering (days)   35 - 45
Duration (days)   105
Grain yield (Kg/ha)
Rainfed   900
Irrigated   1400
Habit   Erect and bushy determinate
  photo insensitive
Height (cms)   60
Colour of flowers   Purple
Colour of pod   Green
Shape of pod   Flat
Colour of grain   Black
100 seed weight (g)   20.0

SEED RATE

Particulars Quantity of seed required kg/ha
  Sole crop Mixed crop
     
CO 1 20 10.0
CO 2 25 12.5

 

CROP MANAGEMENT

MANAGEMENT OF FIELD OPERATIONS

1. FIELD PREPARATION

Prepare the land to fine tilth.

2. SEED TREATMENT WITH FUNGICIDES

Treat the seeds with Carbendezim (or) Thiram @ 2g/kg of seed 24hrs before sowing (or) with talc formulation of Trichoderma viride @ 4 g/kg seed (or) Pseudomonas fluorescens @ 10 g/kg seed.

Biocontrol agents are compatible with biofertilizers.

First treat the seeds with biocontrol agents and then with Rhizobium. Fungicides and biocontrol agents are incompatible.

3. SEED TREATMENT WITH BACTERIAL CULTURE

Fungicide treated seeds should be again treated with bacterial culture. There should be an interval of atleast 24 hours between fungicidal and bacterial culture treatments. Three packets of bacterial culture are sufficient for treating seeds required for one hectare. The bacterial culture may be prepared with rice kanji. Dry the inoculated seeds in shade for 15 minutes, before sowing.

4. FERTILIZER APPLICATION

a)Apply fertilizers basally before sowing.

Rainfed : 12.5 kg N + 25 kg P2O5 + 12.5 kg K2 O +10 kg S*/ha Irrigated : 25 kg N + 50 kg P2O5 + 25 kg K2O + 20 kg S*/ha
*Note : Applied in the form of gypsum, if Single Super Phospate is not applied as a source of phosphorus

  1. Soil application of 25 kg ZnSo4/ha under irrigated condition

5. SOWING

Dibble the seeds, adopting the following spacing.

Strain Sole crop Mixed crop
CO 1 90 cm x 30 cm 200 cm x 30 cm
CO 2 45 cm x 15 cm 200 cm x 15 cm

6. WEED MANAGEMENT

  • Pre emergence application of Pendimethalin @ 2 litres/ha on 3 days after sowing using Backpack/ Knapsack/Rocker sprayer fitted with flat fan nozzle using 500 l of water for spraying one ha. After this, one hand weeding on 40-45 days after sowing gives weed free environment throughout the crop period.
  • If herbicides are not applied, give two hand weedings on 25th  and 45th days after sowing.

7. WATER MANAGEMENT

Irrigate immediately after sowing, followed by life irrigation on the third day. Irrigate at intervals of 7to 10 days depending upon soil and climatic conditions. Flowering and pod formation stages are critical periods when irrigation is a must. Avoid water stagnation at all stages. Apply KCl at 0.5 per cent as foliar spray during vegetative stage if there is moisture stress.

8. HARVESTING

Dry pods may be collected for grain purposes. Green mature pods may be collected for vegetable purpose.

9. Post Harvest Technology