Environmental Entomology (1984) 13, 1613-1617

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F.E. Gilstrap, T.J. Kring and G.W. Brooks (1984)
Parasitism of aphids (Homoptera: Aphididae) associated with Texas sorghum
Environmental Entomology 13 (6), 1613-1617
Abstract: More than 7,700 greenbug and nearly 2,200 corn leaf aphid mummies were collected from sorghum grown in the six vegetational regions of Texas. Adult parasites emerged from 5,635 of the collected greenbug mummies and 1,468 of the collected corn leaf aphid mummies. Of the mummies producing adult parasites, 4,040 resulted in three species of hymenopterous primary parasites, Lysiphlebus testaceipes (Cresson) and Diaeretiella rapae (M'Intosh) (Braconidae), and Aphelinus varipes (Foerster) (=A. nigritus Howard) (Aphelinidae). The remaining 3,064 emerged adults represented five species of hymenopterous hyperparasites, Pachyneuron siphonophorae (Ashmead) and Asaphes lucens (Provancher) (Pteromalidae), Alloxysta sp. (megourae complex) (Cynipidae), Aphidencyrtus aphidivorus (Mayr) (Encyrtidae), and Tetrastichus minutus (Howard) (Eulophidae). About 43% of the 7,103 aphid mummies produced hyperparasite species, or ca. 45% of the greenbug mummies and 35% of the corn leaf aphid mummies. Alloxysta sp. was always most common from L. testaceipes-produced mummies, and A. aphidivorus was usually most common from A. varipes-produced mummies. P. siphonophorae was nearly always the most common hyperparasite regardless of region or host aphid, Alloxysta sp. was usually second most common, and A. aphidivorus third most common. The survey did not recover any of the six species of exotic greenbug parasites previously imported from Europe and released in Texas or Oklahoma. These exotic parasite species are either not established or not yet exerting a significant influence on the greenbug.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: English)
Database assignments for author(s): Timothy J. Kring

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation


Pest and/or beneficial records:

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


Rhopalosiphum maidis Sorghum (crop) U.S.A. (mid S)
Schizaphis graminum Sorghum (crop) U.S.A. (mid S)
Lysiphlebus testaceipes (parasitoid) Rhopalosiphum maidis Sorghum (crop) U.S.A. (mid S)
Lysiphlebus testaceipes (parasitoid) Schizaphis graminum Sorghum (crop) U.S.A. (mid S)
Diaeretiella rapae (parasitoid) Rhopalosiphum maidis Sorghum (crop) U.S.A. (mid S)
Diaeretiella rapae (parasitoid) Schizaphis graminum Sorghum (crop) U.S.A. (mid S)
Aphelinus varipes (parasitoid) Rhopalosiphum maidis Sorghum (crop) U.S.A. (mid S)
Aphelinus varipes (parasitoid) Schizaphis graminum Sorghum (crop) U.S.A. (mid S)
Aphelinus nigritus (parasitoid) U.S.A. (mid S)