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Resistance to Melanaphis sacchari in the sugarcane cultivar R 365

Fartek B., Nibouche S., Turpin P., Costet L., Reynaud B.. 2012. Entomologia Experimentalis et Applicata, 144 (3) : p. 270-278.

This study focuses on the resistance of sugarcane, Saccharum spec. (Poaceae), to the sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), which vectors Sugarcane yellow leaf virus (SCYLV). Resistance was characterized in cultivar R 365, using a 3-year field trial and laboratory experiments on potted plantlets and excised leaves. R 365 reduced aphid populations in the field by antixenosis and antibiosis. Using the electrical penetration graph technique, we detected delayed aphid salivation in phloem and inhibition of passive phloem sap uptake in R 365. The resistance factors also proved to be effective against the corn leaf aphid, Rhopalosiphum maidis (Fitch) (Hemiptera: Aphididae), another vector of SCYLV. (Résumé d'auteur)

Mots-clés : analyse stochastique; expérimentation au champ; saccharum spontaneum; hybride; développement biologique; dynamique des populations; rhopalosiphum maidis; zea mays; melanaphis; virus des végétaux; vecteur de maladie; variété; mécanisme de défense; résistance aux organismes nuisibles; saccharum officinarum; saccharum; réunion; sugarcane yellow leaf virus; melanaphis sacchari

Thématique : Ravageurs des plantes; Maladies des plantes

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