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Biology and Biotype Determination of Greenbug, Schizaphis graminum (Hemiptera: Aphididae), on Seashore Paspalum Turfgrass (Paspalum vaginatum)

Permanent URL:
http://handle.nal.usda.gov/10113/15556
File:
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Abstract:
Greenbug, Schizaphis graminum (Rondani) (Hemiptera: Aphididae), was first discovered damaging seashore paspalum (Paspalum vaginatum Swartz) turfgrass in November 2003 at Belle Glade, FL. Inquiries to several golf courses with seashore paspalum turf across southern Florida indicated infestation was wide spread by April 2004. Damage symptoms progress from water soaked lesions surrounding feeding sites within 24 h to chlorosis and necrosis of leaf tips within 96 h. Problems caused by greenbug feeding were initially misdiagnosed as fertilizer, disease, other insects, or water management problems because aphids were not previously found on warm season turfgrasses. Greenbug development and fecundity studies were conducted on six seashore paspalum varieties: 'Aloha,' 'SeaDwarf,' 'SeaGreen,' 'SeaIsle,' 'SeaWay,' and 'SeaWolf.' Greenbug did not survive on 'SeaWolf.' Development rates (mean ± SEM) ranged from 7.6 ± 0.2 to 8.2 ± 0.2 d on the remaining varieties. Greenbug longevity and fecundity on 'Aloha' were significantly less than on the other varieties. The estimated intrinsic rate of natural increase (rm) for greenbug ranged from 0.24 to 0.26 across tested varieties. Values for net reproductive rate (Ro) ranged from 12.3 on 'Aloha' to 40.4 on 'SeaWay.' In feeding trials on indicator plants, the Florida isolate of greenbug exhibited a unique biotypic profile most commonly found on noncultivated grass hosts. It was virulent on the wheat variety GRS1201 that is resistant to the principal agricultural biotypes attacking small grains and to all currently available resistant sorghum varieties.
Author(s):
Nuessly, G.S. , Nagata, R.T. , Burd, J.D. , Hentz, M.G. , Carroll, A.S. , Halbert, S.E.
Subject(s):
Schizaphis graminum , insect biology , biotypes , host plants , Paspalum vaginatum , turf grasses , cultivars , insect development , insect reproduction , fecundity , longevity , mortality , virulence , plant damage , Florida
Format:
p. 586-591.
Note:
Includes references
Source:
Environmental entomology 2008 Apr., v. 37, issue 2
Language:
English
Year:
2008
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.