Resistance to Melanaphis sacchari (Hemiptera: Aphididae) in Forage and Grain Sorghums

J. Scott Armstrong, Lloyd Mbulwe, Danielle Sekula-Ortiz, Raul T. Villanueva, William L. Rooney

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

The sugarcane aphid, Melanaphis sacchari (Zehntner), has established itself as a perennial pest of grain and forage sorghums in the United States since the summer of 2013. We conducted traditional plant resistance studies that determine tolerance, antibiosis, and antixenosis in 32 sorghum genotypes when challenged with sugarcane aphids. The genotypes included one exotic plant introduction and 31 seed and pollinator parental lines that are used to produce grain, sudangrass, and forage sorghum hybrids. One seed parent (B11055) and one grain pollinator parent (R13219) expressed significant degrees of tolerance, antibiosis, and antixenosis and were top performers in all three resistance type experiments. An additional group of seed parents (B13045 and B1057) and grain pollinator parents (R11159, R13422, and RTx2908) and the plant introduction (PI 550610) resulted in an intermediate range of phenotypic resistance (i.e., 4.0 < 6.0) indicative of antibiosis from reduced fecundity, increased intrinsic rate of increase, and increased generation times. The forms of resistance expressed in these lines, especially B11055 and R13219, have great potential in breeding programs that can be integrated into useable forms of resistant sorghums.

Original languageEnglish
Pages (from-to)259-265
Number of pages7
JournalJournal of Economic Entomology
Volume110
Issue number1
DOIs
StatePublished - Feb 1 2017

Bibliographical note

Publisher Copyright:
© 2016 Published by Oxford University Press on behalf of Entomological Society of America 2016. This work is written by US Government employees and is in the public domain in the US.

Keywords

  • Melanaphis sacchari
  • forage sorghum
  • grain sorghum
  • resistance

ASJC Scopus subject areas

  • Ecology
  • Insect Science

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