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United States Department of Agriculture

Agricultural Research Service

Research Project: Insect Ecology and Sustainable Systems for Insect Pest Management in the Southeastern Region

Location: Crop Protection and Management Research

Title: Multi-state survey of picture-winged flies (Diptera:Ulidiidae) attacking sweet corn in the southern U.S.

item Nuessly, G
item Goyal, G
item Scully, Brian
item Ni, Xinzhi
item Sparks, A
item Buntin, G
item Huang, F
item Leonard, B
item Mclowd, P
item Simmons, Alvin
item Daves, C
item Pfannenstiel, Robert
item Henry, William

Submitted to: American Society of Horticulture Science Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 3/10/2011
Publication Date: 9/25/2011
Citation: Nuessly, G.S., Goyal, G., Scully, B.T., Ni, X., Sparks, A.N., Buntin, G.D., Huang, F., Leonard, B.A., Mclowd, P.J., Simmons, A.M., Daves, C., Pfannenstiel, R.S., Henry, W.B. 2011. Multi-state survey of picture-winged flies (Diptera:Ulidiidae) attacking sweet corn in the southern U.S. American Society of Horticulture Science Meeting. 46:S363.

Interpretive Summary:

Technical Abstract: Four picture-winged fly (Diptera: Ulidiidae) species in two genera were identified as direct pests of sweet and field corn ears in Florida from surveys conducted during 2007 and 2008. Larvae emerge from eggs deposited mostly in the silk canal to damage silk, kernels and cob rendering infested sweet corn ears unmarketable. Euxesta annonae (F.) and E. stigmatias Loew were found in corn only in southern Florida. Chaetopsis massyla (Walker) and E. eluta Loew were found in corn throughout the state, including most counties along the northern border with Georgia and Alabama. Studies were conducted in 2008 through 2010 to examine whether corn-infesting ulidiid species were attacking corn north and west of Florida in the southern USA. Ears were inspected for ulidiid larvae and pupae at 14 to 20 d after first silk in sweet corn plots (cv. ‘GSS 0966’ and ‘Garrison’, Rogers Brand, Syngenta Seed) planted late spring through summer within corn producing regions of Arkansas, Georgia, Louisiana, Mississippi, South Carolina and southern Texas. Additional commercial sweet and field corn fields were sampled in each of these states and in Alabama for evidence of ulidiid larval damage. Infested ears were shipped to Florida where they were held at 26.0 ± 1°C and L14:D10 h photoperiod for emergence of adults used for species identification. Chaetopsis massyla and E. eluta were reared from infested corn collected in Georgia and Alabama. Chaetopsis massyla adults emerged from ears collected in Louisiana, and South Carolina.

Last Modified: 07/26/2017
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