jnkvv college of agriculture tikamgar

2. Guided by presented by
Rearing of corcyra cephalonica
Dr. M.K.NAYAK SUKHLAL MANDLOI
DEPARTMENT OF ENTEMOLOGY
KRISHI MAHA VIDYALAYA, TIKAMGARH, (M. P.)
Roll No. 5783

3. Rearing of corcyra cephalonica
 The larvae of C. cephalonica can be reared on
cumbu grain.
 Heat sterilization broken cumbu grain @2.5 kg along
with 100 g of groundnut powdered yeast tablet are
taken in a wooden or plastic trays
(45cm×30cm×10cm)
 Streptomycin sulphate 0.05% spray is given@10 to
20 ml per tray to prevent bacterial infection.

4.  Corcyra eggs @o.5 (8000-9000 eggs)/ tray uniformly
mixed in cumbu medium and the trays are covered
with kada cloth, secured by rubber band.
 The hatching larvae feed on the grain by webbing
and larvae period lasts for 30-35 days.
 The population takes place inside the web itselfe.

5.  The pupal period lasts for 5-7 days and adult moths
emerge after 30-45 days from the data of egg
inoculation.
 The emerging Corcyra adults are collected every
morning and transferred to a specially designed
mating drum made of G.I. with wire mesh bottom
where they are provided with honey solution as food.

6.  The eggs are collected at the bottom on a blotting
paper kept in a tray.
 The eggs are cleaved with sieves or eggs separator.
 One cc of egg will contain approximately 16,000 to
18,000 eggs.
 About 100 pairs of Corcyra moth will produce 1.5 cc
of eggs during the four days of egg laying period .

7.  From each culture tray a maximum of 2500 moths
can be obtained.
 A tray can be kept for about 90 days for collection of
adult moths due to staggered development .

8. Mass culturing of egg parasitoid
Trichogramma
 The eggs of Corcyra are sterilized by exposing to UV
light (15 W for half an hour to kill embryo and are
sprinkled uniformly on large egg cards (30 cm × 20
cm) divided into 30 rectangles (7 cm × 2 cm ) by
drawing lines containing a thin layer of gum @ 6 cc
/card .
 These cards are taken in large polythene bags (45
cm × 30 cm ) containing nucleus egg card at a ratio
of 1:6 to fresh eggs and exposed for 2 days.

9.  They are kept for another 2 days at room
temperature and on fourth day parasitised eggs turn
black in colour.
 At this stage , the parasitized egg can be used for
field release or stored at 10°C for a fortnight .