Larval performance of the pyralid borer Eldana saccharina Walker and stalk damage in sugarcane: Influence of plant silicon, cultivar and feeding site

Kvedaras Olivia L., Keeping Malcom G., Goebel François-Régis, Byrne Marcus J.. 2007. Larval performance of the pyralid borer Eldana saccharina Walker and stalk damage in sugarcane: Influence of plant silicon, cultivar and feeding site. International Journal of Pest Management, 53 (3) : 183-194.

Résumé : Applied silicon (Si) can improve resistance of plants to insect attack. We investigated the interactions between soil applied Si, sugarcane cultivar, and three documented feeding/penetration sites (internode, leaf bud, and root primordia), each at three heights (top, middle, and base) on the stalk and their effects on stem borer, Eldana saccharina Walker (Lepidoptera: Pyralidae) performance and the stalk damage it inflicts. Four sugarcane cultivars, treated (Si+) and untreated (Si-) with calcium silicate, were artificially infested with E. saccharina and the larvae were examined 21 days later. Silicon treatment significantly increased stalk Si content in all sugarcane cultivars and, overall, significantly reduced borer growth rate and also reduced stalk damage, particularly at the internode. Borer survival and growth rate and stalk damage were lowest at the internode, particularly in Si+ resistant cultivars. Although the internode had the hardest rind, hardness at each site was not significantly increased by Si+.

Mots-clés Agrovoc : Saccharum, Eldana saccharina, silicium, résistance aux organismes nuisibles, variété, développement biologique, infection expérimentale

Mots-clés complémentaires : Cultivar

Classification Agris : H10 - Ravageurs des plantes
F62 - Physiologie végétale - Croissance et développement

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Kvedaras Olivia L., SASRI (ZAF)
• Keeping Malcom G., SASRI (ZAF)
• Goebel François-Régis, CIRAD-PERSYST-UPR Systèmes canniers (FRA) ORCID: 0000-0002-5438-1078
• Byrne Marcus J., University of the Witwatersrand (ZAF)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/540826/)

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