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Plant morphological traits associated with field resistance to cardamom thrips (Sciothrips cardamomi) in cardamom (Elettaria cardamomum).

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Title Plant morphological traits associated with field resistance to cardamom thrips (Sciothrips cardamomi) in cardamom (Elettaria cardamomum).
Not Available
 
Creator T.K. Jacob
C.M. Senthil Kumar
S. Devasahayam
Sharon D'Silva
R. Senthil Kumar
C.N. Biju
R. Praveena
S.K.J. Ankegowda
 
Subject Host plant resistance
cardamom thrips
plant morphological traits
 
Description Not Available
Cardamom thrips (Sciothrips cardamomi) is a major insect pest of cardamom
(Elettaria cardamomum) causing severe economic losses to the crop in all cardamom
producing countries. The present control measures rely heavily on chemical insecticides,
which in addition to increased input costs also lead to pesticide residues in
the produce and environmental hazards. Although the crop is of high commercial
value, limited efforts have been made to identify sources of resistance to this major
pest. Exploiting sources of resistance along with integrated pest management tactics
will help to reduce pesticide usage in this crop promoting sustainable production.
The present study aimed at identifying sources of resistance against
cardamom thrips and the associated plant morphological traits conferring resistance
against the pest. Field screening of 180 cardamom germplasm accessions for
3 years at Appangala, Karnataka, India, resulted in identification of eight accessions
resistant to cardamom thrips. Differences in panicle type and the nature of adherence
of leaf sheath to the pseudostem explained a significant amount of the variance
in resistance and therefore are likely to play a major role in conferring
resistance against this pest. Multiple regression analysis of the different traits indicated
that accessions with prostrate panicles having leaf sheath loosely adhered to
the pseudostems were found to have significantly less thrips damage, when compared
with other panicle and leaf sheath types. However, persistence of flower
bract did not have a significant additive effect on imparting resistance against
thrips. Metabolomic analysis of the accessions may provide further insight into the
existence of supplementary biochemical mechanisms, if any, in imparting resistance.
The identified traits and accessions can be exploited in future breeding programmes
for developing thrips resistant cardamom varieties.
ICAR
 
Date 2021-07-27T17:16:37Z
2021-07-27T17:16:37Z
2020-05-05
 
Type Journal
 
Identifier Jacob TK, Senthil Kumar CM, Devasahayam S, et al. Plant morphological traits associated with field resistance to cardamom thrips (Sciothrips cardamomi) in cardamom (Elettaria cardamomum). Ann Appl Biol. 2020;177: 143–151. https://doi.org/10.1111/aab.12592
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/50309
 
Language English
 
Relation Not Available;
 
Publisher Wiley