Indian Society of Genetics & Plant Breeding

Pigeonpea-Lac insect interaction: Effect of lac culture on grain yield and biochemical parameters in pigeonpea

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Present experiment was conducted to know the impact of
pigeonpea-lac insect interaction for the production of raw
lac/scrapedlac as well as grain yield and protein quality
in seeds. On the basis of broodlac and scrapedlac yield,
five genotypes of pigeonpea viz., IPA 8-2, Bahar, Assam
local, 591139 and RCMP 5 were identified
promising for lac production. Rearing of lac insect on
pigeonpea reduced 100 seed weight (13.03%) and grain
yield per plant (12.08%) significantly but no significant
reduction was observed on crude protein content in seeds
(1.02%). Biochemical traits measured in mature leaves in
inoculated and control plants revealed that reducing sugar
(RS), chlorophyll ‘a’ and total chlorophyll decreased after
lac insect inoculation but non-reducing sugar, total sugar
(TS), proline and malondialdehyde increased after insect
inoculation. The biotic stress rendered due to lac insect
(free phenol) and abiotic stresses due to high temperature
(malondialdehyde) did not significantly affect scrapedlac
yield. High chlorophyll components along with high
metabolites (RS andTS) supported high scrapedlac yield.
Hence, farmers can cultivate lac on this host plant to get
good raw lac and grain yield without losing the crude
protein quality of grain. The loss in grain yield is
compensated by additional income from raw lac.The profit
obtained from raw lac along with grain will be much higher
than sole crop for grain.

Keywords: Pigeonpea, lac insect, interaction, grain yield, biochemical traits


Year: 2014
Volume: 74
Issue: Supplementry Issue
Article DOI: 10.5958/0975-6906.2014.00904.3
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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