Full TGIF Record # 215290
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Web URL(s):http://archive.lib.msu.edu/tic/rpr/2000/72127,%20U%20Georgia,%20Braman.PDF
    Last checked: 02/13/2013
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Publication Type:
Material Type:Manuscript
Monographic Author(s):Braman, S. Kristine
Author Affiliation:PI
Monograph Title:Integrating Biologically-Based Strategies for Turfgrass Pest Management: Phase II: 2000 Annual Report, 2000.
Publishing Information:[Athens, Georgia]: University of Georgia
# of Pages:4
Collation:[4] pp.
Abstract/Contents:"The encompassing objective is to develop and refine best environmentally-oriented management practices for long-term maintenance on golf courses. The potential for compatibility among two biologically-based management strategies: host plant resistance and biological control will be evaluated in this three year project. In Phase I, genotypes were screened for potential resistance to a guild of insect pests that limit turfgrass growth, establishment or appearance. During Phase II we propose to take the next step and develop strategy that will allow enhancement of biological control with parasitoids and predators by using grasses with partial, yet incomplete resistance to selected turfgrass pests. Using turfgrass with intermediate resistance introduces sustainability into the system by reducing the potential for insect pests to overcome the plant's defenses. By combing plant resistance to insects with enhanced activity of natural enemies, a more stable system may result with greatly reduced need for chemical intervention. A serious of laboratory and field experiments will examine this relationship. Field evaluation of interaction between resistant plants and natural control of fall armyworm Six zoysiagrass, paspalum, and bermudagrass cultivars representing a range of resistance to fall armyworms as previously determined among ca. 100 turfgrass selections that we have recently evaluated will be used for the proposed field and lab studies. They include 'Palisades' and 'Cavalier' zoysiagrasses; 'Tifsport' and 'Tifeagle' bermudagrasses; 561-79 and Sea Isle 1 paspalumgrass. These grasses have been planted in the field in a randomized complete block design with six replications. Plots (each 25 m2)are located at the Georgia Station in Griffin. A new turfgrass research area in the Research and Education Garden was developed during 2000. Irrigation was installed during May and research plots sprigged with appropriate grasses on May 22. Cover was nearly 100% in all plots by October 2000. Field sampling will be initiated summer 2001. Laboratory evaluation of influence of pest-resistant plants on fall armyworm susceptibility to natural enemies. Prey acceptability studies were conducted during summer 2000 for the big eyed bug, Geocoris uliginosus, a very common predator in turfgrass. Turfgrasses included Cavalier, Palisades, 9601, Diamond and Royal zoysiagrass; Tulsa tall fescue, Dawson E+, Tifsport and Tifeagle bermudagrasses and 561-79 and Sea Isle 1 seashore paspalums. The predator/prey profile developed indicated that big eyed bugs will feed on fall armyworms fed either susceptible or resistant grasses. Furthermore, while fall armyworm larvae reared on susceptible grasses were suitable prey for adult big eye bugs only from day 1 through day 6, those larvae reared on more resistant grasses remain smaller and were acceptable prey for big eyed bugs for a much longer period. This expanded "window of vulnerability" is a positive indication of compatibility among two biologically-based management strategies. Field evaluation of interaction between resistant plants and control of fall armyworm with standard chemical, microbial and alternative products. Field plots will be treated with bacterial products (Bacillus thuringiensis), Sinosad=Conserve, and Dursban to determine whether grasses displaying partial resistance to fall armyworms also render the pest more susceptible to standard chemical, microbial and alternative products."
See Also:See also related summary article, "Development of minimal input best management practices for paspalum: insect resistance", 2000 Turfgrass and Environmental Research Summary [USGA], 2000, p. 24, R=72127. R=72127
Note:Also appears as pp. 0799-0802 in the USGA Turfgrass Research Committee Reporting Binders for 2000
"2000 Annual Report"
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