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Web URL(s): | http://www.bioone.org/doi/full/10.3954/1523-5475-26.3.107 Last checked: 11/08/2011 Access conditions: Item is within a single large file |
Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Reinert, James A.;
Campos, C.;
Chandra, A. |
Author Affiliation: | Reinert: Texas A&M University, Dallas, TX |
Title: | Biotypes of the southern chinch bug |
Section: | Abstracts Other records with the "Abstracts" Section
|
Source: | Journal of Agricultural and Urban Entomology. Vol. 26, No. 3, July 2009, p. 125. |
Publishing Information: | Clemson, SC: South Carolina Entomological Society, Inc. |
# of Pages: | 1 |
Keywords: | TIC Keywords: Biotypes; Blissus insularis; Cultivar improvement; Insect resistance; Insect surveys; Population dynamics; Stenotaphrum secundatum
|
Cultivar Names: | Floratam; FX-10; Captiva |
Abstract/Contents: | "Southern chinch bug [Blissus insularis Barber] populations in Texas have changed significantly from populations present in the Southeastern U.S. Populations in Florida overcame the resistance in 'Floratam' St. Augustinegrass [Stenotaphrum secundatum Waltz (Kuntze)] in 1987 after the grass had provided resistance for about 14 years of field life. Subsequent releases of 'FX-10' (1990) and 'Captiva' (2008) cultivars have provided high antibiosis of chinch bugs (80-100% mortalities of confined bugs) in Florida. Populations were discovered in south-central Texas in 2005 that expressed low antibiosis, ā¤20% mortalities, after 7 d of confined feeding on Floratam. Additional sampled populations across the state show that Floratam and FX-10 killed 20% of confined bugs in 7 d while Captiva killed 19% in 7 d and only 27% in 14 d. Some Texas populations were extremely non-responsive to these "resistant" cultivars; i.e. Floratam (4% mortality), FX-10 (2%), and Captiva (4%) at 7 d and Floratam (42% mortality), FX-10 (48%), and Captiva (8%) after 14 d of confined feeding in no-choice tests. Other populations were highly variable: Floratam (80%), FX-10 (88%), and Captiva (54%) mortality after 7 d of confined feeding. I believe enough evidence has been developed to designate the very virulent populations in Texas that has overcome the resistance in Captiva as Biotype 2, with the populations that overcame the resistance in Floratam as Biotype 1, and the original strain of southern chinch bugs that could not survive on Floratam as the Wild Type. A total of 24 different populations have been sampled ranging from Longview, Dallas, Waco, Austin, San Antonio, College Station, Bryan, Wharton, Bay City, Huntsville, Houston, and League City" |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Reinert, J. A., C. Campos, and A. Chandra. 2009. Biotypes of the southern chinch bug. J. Agric. Urban Entomol. 26(3):p. 125. |
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| Web URL(s): http://www.bioone.org/doi/full/10.3954/1523-5475-26.3.107 Last checked: 11/08/2011 Access conditions: Item is within a single large file |
| MSU catalog number: b3574666 |
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