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Bottom-up effects of different host plant resistance cultivars on ber (Ziziphus mauritiana)-fruit fly (Carpomyia vesuviana) interactions

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Title Bottom-up effects of different host plant resistance cultivars on ber (Ziziphus mauritiana)-fruit fly (Carpomyia vesuviana) interactions
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Creator S.M. Haldhar, R. Bhargava, Hare Krishna, M.K. Berwal, P.L. Saroj
 
Subject Fruit fly Ber Bottom-up effect Plant-insect interactions Hot arid environment
 
Description Not Available
The fruit fly, Carpomyia vesuviana Costa (Tephritidae: Diptera) is an important pest of ber (Ziziphus mauritiana L),
leading to significant losses in yield in the hot arid agro-climate of India. Variation in resource input (antixenotics
and allelochemicals) to plants trigger bottom-up effects on ber-fruit fly interactions. However, variation
in plant extrinsic and intrinsic traits in response to resource availability may modify the bottom-up effects. The
objectives of this study were to identify and categorize sources of resistance in ber cultivars to C. vesuviana from
the arid region of India. We found that: (i) three cultivars were resistant; 13 cultivars were moderately resistant;
6 cultivars were susceptible and three cultivars were highly susceptible to fruit fly infestation; (ii) the phenol,
tannin and flavonoid contents had significant negative correlations with percent fruit infestation. The percent
fruit infestation had significant positive correlations with fruit length, pulp: stone ratio and had significant
negative correlation with pericarp thickness. Pulp texture and fruit surface were found to be hardy and rough,
respectively, in resistant cultivars of ber; and (iii) flavonoid and phenols content explained (89%) of the total
variation in fruit fly infestation. Two principal components (PCs) were extracted which explained the cumulative
variation of 84.7% in fruit fly infestation. PC1 explained 59.9% of the variation while PC2 explained 24.9% of
the variation. Growers can adopt the potential resistant cultivars of ber (Tikadi, Katha and Illaichi cultivars) with
minimal financial investment to obtain higher yields. Hence, a benefit of resistance cultivars for yield potential is
apparent and resistance cultivars can be used as an important component of sustainable management.
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Date 2018-05-18T06:58:03Z
2018-05-18T06:58:03Z
2018-05-01
 
Type Article
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/6066
 
Language English
 
Relation Not Available;
 
Publisher Not Available