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Titre :
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Modalities of Resistance of N-2 Red Clover Germplasm to Pea Aphid (Homoptera, Aphidiae)
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Auteurs :
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F. Zeng ;
G. Pederson ;
F. Davis ;
M. Ellsbury
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Type de document :
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article/chapitre/communication
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Année de publication :
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1994
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Format :
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349-359
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Langues:
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= Anglais
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Mots-clés:
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Pea Aphid
;
Red Clover
;
Host Plant Resistance
;
Homoptera
;
Aphididae
;
Acyrthosiphon-Pisum
;
Trifolium-Pratense
;
Mecanisme de resistance
;
Test de resistance
;
Variete resistante
;
Survie
;
Trifolium pratense
;
Leguminosae
;
Acyrthosiphon pisum
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Résumé :
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The modalities of resistance in N-2 red clover (Trifolium pratense L.) germplasm to pea aphid, Acyrthosiphon pisum (Harris), were determined by conducting experiments within growth chambers for presence of antixenosis, antibiosis and/or tolerance. Two red clover cultivars, 'Tensas' and 'Redland', were used for comparisons with N-2. Pea aphids significantly preferred the susceptible red clover plants of 'Redland' and 'Tensas' over the N-2 plants when given a choice. When aphids were reared on the three clovers in a no-choice experiment, survival and fecundity were significantly lower for those reared on N-2 than for those on one or both of the susceptible clovers. No significant differences in plant growth parameters were observed among clovers when equal numbers of aphids were maintained on plants of the three clovers. The modalities of resistance operating in N-2 were found to be a combination of antixenosis and antibiosis.
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Source :
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Journal of Agricultural Entomology - 0735-939 X, vol. 11, n° 4
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