Local name: Eri polu
Scientific name: Philosomia ricini
Familiy: Saturniidae
Eri polu
Host plant: Ricinuc communis (Erah gos), Kesseru,
Barkesserus, Tapioca, Gomari, Payan, Gulancha etc are use. But Erah gos is the
primary host plant for Eri silkworm.
Erah gos
Diseases:
1.
Pebrine: Pebrine cause
by a protozoan parasite name Nosema bombycis. Locally called as phutukia. When larva
suffers fromthis disease, it becomes weak and possesses distorted and dark
black coloured wings. The silk gland is also infected afterwards.
Control:
a) The disease
can be controlled washing the eggs with 2% formalin.
b) Disease
infected larva should be removed from the rearing bed as soon as detected.
c) Properly
dried and disinfected or sterilized rearing trays should be used to avoid of
infection from this disease.
2. Flacherie: It is caused by virus followed by a secondary
bacterial infection. Locally this disease is known as “Mukhlaga”. The larva
generally suffers from this disease when mixed leaves of different host plants
are fed.
Control:
a)
To control this
disease, rearing bed should be kept clean.
b)
The larva must be
provided with one kind of from larval stage to maturity.
c)
The excreta and the
dead larvae should be immediately removed from the rearing tray.
1. Egg (কণী)
Eggs
2. Larva (পলু)
Larva
3. Pupa (লেটা)
Cocoons Pupa
4. Moth (চকৰী).
