Sericulture Information Linkages
And Knowledge System

Central Silk Board, Minisitry of Textiles, Government of India, Bangalore
Cachar, Assam

Silkworm Food Plant Production Technology

Eri Food Plant Production Technology


Castor, Ricinus communis

Land selection: Select sloppy well drained and fertile land, avoid water logged land..

Season:March- April and September- October (Pre and post monsoon).

Soil: Both acidic and alkaline soils are suitable.

Land preparation
  • Land should be ploughed 2-3 times to a depth of 20-25 cm and leveled for facilitating good rootpenetration and easy weeding.
  • 20 x 25 x 25cm (Length x Breadth x Depth) size pits are to be prepared maintaining 1x1m spacing
  • In each pit, 1 kg well decomposed FYM is to be applied mixed thoroughly with soil
Seed treatment and sowing
  • Select mature seeds.
  • Seeds should be treated with Bavistin @ 2 g/kg seed to prevent fungal disease.
  • Two seeds per pit at a depth of 2.5–3.0 cm are to be sown.
  • Germination takes place after 7-10 days.
  • Only one healthy seedling per pit is to be allowed for vigorous growth after germination.


Cultural operation
  • Apply NPK@ 60:40:20 kg/ha as 1st dose after one month of germination at the base of the plants bymaking rings or along with FYM at the time of pit digging.
  • After 3 months, 30 kg N/ha and 1 kg FYM/plant should be applied for vigorous growth and yield.
  • Carry out hoeing and weeding whenever necessary (3-4 times in a year).


Leaf harvest
  • Make the 1st leaf harvest after 3 month of plantation.
  • Make 2nd, 3rd, 4th and 5th harvest after one month of preceding harvest.


Kesseru, Heteropanax fragrans

Nursery raising

Land selection:select well drained plain or sloppy land.



Nursery bed preparation
  • lough the land 2-3 times and level it.
  • Make 6 m x 2m bed and lift up to 15 cm above ground level.
  • Apply 6 cft FYM and sand to each bed, mix thoroughly with the soil and level it.
  • Leave the bed as such for 2 weeks.
  • Apply 0.1% Indofil-M45 and Forat BHC solution @ 20 l/ha 2 days before sowing and mix with the soil toavoid pest attack.
Seed collection
  • Cover the Kesseru fruit on the plant with nylon net
  • Collect the ripe fruit during February-March.
  • Store the fruit in shade for 1-2 days.
  • Soak the fruits overnight in water.
  • Rub the fruits with a gunny cloth.
  • Put the fruit in water and select only the sunken ones for sowing.
Seed sowing
  • Sow 800 seeds (2 seeds/pit) in each nursery bed maintaining a spacing of 15 cm (pit to pit) by 20 cm(row to row).
  • Mulch the seed bed with a thin layer of straw.
  • Irrigate regularly in the morning and late noon hours during dry season.
  • Provide a shed over the bed to protect from the direct sun light and hailstorm.
  • 90% Germination can be obtained within 18-25 days.
  • Displace the mulch after 90% germination.
  • Displace the mulch after 90% germination.
Cultural operation
  • Carry out weeding at an interval of 20-30 days till the seedlings attain a height of 20-25 cm.
  • Spray 0.05% Rogor along with 0.1 % Indofil-M45 at an interval of 15-20 days to prevent leaf diseasesand pests.
  • Allow the seedlings to cover to a height of 4 feet and keep one seedling per pit.
  • Spray 10% urea solution 3 times at an interval of 15 days for vigorous growth.


Plantation in the main field

Land selection: Select high and sloppy land, avoid water logging.

Season: August- September.

Land preparation: Plough the land to a depth of 20-25 cm and level it.


Pit Digging and spacing
  • Prepare 30 x 30 x 30 cm pit at a distance of 2 x 2 m spacing (3 x 3 m spacing can be practiced tofacilitate inter cropping).
  • In each pit, apply 5 kg FYM and mix thoroughly with soil.
Transplantation and cultural operation
  • Six months old healthy seedlings (25-35 cm tall) are to be transplanted to each pit.
  • It is more preferable to plant on a rainy day.
  • Carry out hoeing and weeding whenever required.
Application of manure and fertilizer

Apply 5 kg FYM per plant once in a year during April. Apply NPK @125:75:25 kg/ha in two equal split

doses during April and September by ring digging method.

  • Pollarding is to be done after attaining the age of five years at a height of 1.75 m at slanting (45° angle)preferably during February.
  • Subsequent pollarding is to be done after the interval of 3-4 years.
  • Ericulture-a comprehensive profile 2013, Directorate of Sericulture, BTC, Kokrajhar-783370,Assam.
  • Package of practices of Muga, Eri and Mulberry Sericulture for North Eastern region of India, 2005,Central Muga Eri Research & Training Institute, Lahdoigarh, Jorhat, Assam
  • Dr. M.C. Sarmah, Shri B.N. Sarkar, Shri S. A. Ahmed, Dr. K. Neog, CMER&TI, Lahdoigarh.