Page 11 - Lac culture operations - IINRG, Ranchi

(iii) COMPLETE HARESTINC:

WHEN . Palat ln October/ November from broodlac set trees and in middle of April from
baisakhi crop of ari set of trees.
. ln summer crop (iethwi and baisakhi) may be harvested 4_5 days before larval
emergence i.e. when the yellow spot appears.
.
Winter crop (aghani and katki) harvest only when a few crawlers seen over encrus_
tation.
. Harvest broodlac from parent trees only when all preparation for inoculation of new
tree is completed.
. Follow rules of pruningwhile harvesting kusum.
. Select broodlac in the field itself.

GROUPING OF HOST TREES (Set System):

. The host gets the opportunity to rest and rejuvenate itself.
(Benefits) . Ensures self- sufficiency in broodlac production
. Cives more succulent shoots.
. Ensures regular income.
. Provides sustained and hlgher yield.
.
Minimises incidence of predators and parasites.

Butea monosperma (Palas) & Ziziphus mauritiana (ber)
.
Divide the total trees into three groups (sets) with equal number of trees in each
(Table 3).

Use two group of trees for broodlac production and remaining one for immature
baisakhi (ari) crop
lf ber trees are also available make two gtoups of palas and third of ber tree use
it for immature baisakhi (ari) crop but harvest it sometimes in late May instead of
April (Table 4).

Keep good and healthy trees in broodlac sets and unhealthy (on which normally
mortality occurs in summer) br ari crop.

Trees on which lac cuiture is prone to mortality due to high temperature during
summer (normally located on rocks or where ground water level is very low) may
be utilised either for immature baisakhi crop or katki crop only.

(a) Broodlac set:

Divide broodlac group of trees in two sets having equal number of trees.
Carryout all the cultivation operations on these two sets in alternate years.
One metre length of broodlac sticks are sufficient to inoculate about 12.5 meters
length of shoot