Journal of Entomological Science (2018) 53, 230-241

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Ankur Limaje, Chad Hayes, J. Scott Armstrong, Wyatt Hoback, Ali Zarrabi, Sulochana Paudyal and John Burke (2018)
Antibiosis and tolerance discovered in USDA-ARS sorghums resistant to the sugarcane aphid (Hemiptera: Aphididae)
Journal of Entomological Science 53 (1), 230-241
Abstract: The sugarcane aphid Melanaphis sacchari (Zehntner) was discovered infesting grain sorghum close to Beaumont, TX, near the Texas and Louisiana state line a few kilometers inland from the Gulf Coast in the late summer of 2013, and has been a perennial pest of grain, forage, and sweet sorghums. Our research was aimed at identifying sorghum germplasm that expresses host-plant resistance to the sugarcane aphid. We originally screened 36 lines including two known resistant sorghums (Tx2783 and DKS-37-07) and two known susceptible sources (WSH 117 and MORCH 858). From this screen, two pollinator lines (R.11143 and R.11259) developed by the USDA-ARS in Lubbock, TX, exhibited tolerance as indicated by damage ratings and growth characteristics, such as plant height, number of leaves, and chlorophyll content. Line R.11143 had a slight net gain in chlorophyll content in the infested plants compared to the noninfested plants, indicating a highly tolerant sorghum. The R.11143 and R.11259 lines also expressed significant levels of antibiosis where net reproduction, number of nymphs produced in a day, intrinsic rate of increase, and the reproductive period in days were all significantly lower than all entries, with the exception of the known resistant controls DKS 37-07 and RTx2783. Pollinators R.11143 and R.11259 are recommended to be used in breeding programs for developing resistant sorghums threatened by the sugarcane aphid.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): J. Scott Armstrong, W. Wyatt Hoback

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Melanaphis sacchari Sorghum (crop) U.S.A. (mid S)