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| Web URL(s): | http://usgatero.msu.edu/v04/n23.pdf
Last checked: 11/22/2005
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Braman, S. Kristine;
Duncan, R. R.;
Hanna, W. W.;
Engelke, M. C. |
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| Author Affiliation: | Braman: Professor of Entomology, University of Georgia, Griffin; Duncan: Turf Ecosystems, L.L.C., Boerne, Texas; Hanna: Professor, Crop and Soil Sciences Department, University of Georgia, Tifton; Engelke: Professor of Turfgrass Breeding, Texas A&M University, Dallas |
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| Title: | Dual defense: Pest-resistant turf and natural enemy interactions |
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| Source: | USGA Turfgrass and Environmental Research Online. Vol. 4, No. 23, December 1 2005, p. [1-7]. |
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| Publishing Information: | Far Hills, NJ: United States Golf Association, Green Section |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Geocoris uliginosus; Biological control organisms; Biological pest control; Pest resistance; Insect pests; Pest control; Spodoptera frugiperda; Parasitism; Variety trials; Paspalum vaginatum; Cynodon transvaalensis; Cynodon dactylon; Zoysia japonica; Zoysia matrella
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| Cultivar Names: | Sea Isle I; 561-79; TifSport; Palisades; TifEagle; Cavalier |
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| Abstract/Contents: | "University of Georgia research is evaluating the potential for resistance to multiple insect pests among turfgrasses for the southeastern US. They report effects of different grasses on the occurrence and activity of natural enemies. The six grasses tested ('Sea Isle I' and '561-79' seashore paspalum, Paspalum vaginatum; 'TifSport' and 'TifEagle' hybrid bermudagrass, Cynodon dactylon x C. transvaalensis; and 'Cavalier' and 'Palisades' zoysiagrass (Zoysia japonica and Z. matrella, respectively) represented a range in resistance to fall armyworm, Spodoptera frugiperda. Among six turfgrass genotypes tested, the braconid wasp, Aleiodes laphygmae, varied in percent parasitism of fall armyworm larvae. A total of 20,400 first-instar larvae of fall armyworm were placed in the field; 2,368 were recovered; 468 parasitoids were subsequently reared; 92.2% were A. laphygmae. The greatest percent reduction in S. frugiperda larvae by A. laphygmae occurred on the armyworm-susceptible seashore paspalums followed by bermudagrass and then zoysiagrass. Percent parasitism of S. frugiperda in this field study decreased with increasing resistance levels to the host insect. The predaceous big eyed bug, Geocoris uliginosus, nymphs varied in ability to reduce numbers of fall armyworm larvae. In the laboratory, the greatest reduction in S. frugiperda larvae by G. uliginosus occurred on the resistant 'Cavalier' zoysiagrass. Larvae remained on the resistant grass for a longer period in a size range susceptible to predation. In field studies, the greatest reduction in S. frugiperda larvae by G. uliginosus occurred on 'Sea Isle I' and '561-79' seashore paspalum. The high levels of parasitism observed in the more susceptible paspalums suggests potential candidates for conservation biological control efforts targeting the specific parasitoids and predators that occur in these grasses." |
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| Language: | English |
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| References: | 15 |
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| See Also: | Other Reports from this USGA research project: 2000-04-171 |
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| Note: | Summary as abstract
Pictures, color
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Braman, S. K., R. R. Duncan, W. W. Hanna, and M. C. Engelke. 2005. Dual defense: Pest-resistant turf and natural enemy interactions. USGA Turfgrass Environ. Res. Online. 4(23):p. [1-7]. |
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| Web URL(s):
http://usgatero.msu.edu/v04/n23.pdf
Last checked: 11/22/2005
Requires: PDF Reader |
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MSU catalog number: SB 433 .A1 A65 [online] |
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