Full TGIF Record # 13276
Item 1 of 1
Publication Type:
i
Report
Author(s):Sanders, P. L.; Soika, M. D.
Author Affiliation:Department of Plant Pathology, Pennsylvania State University
Title:Residual Efficacy of Fungicide Seed Treatments in Suppression of Rhizoctonia Solani on Seedling, Pot-Grown Creeping Pentgrass, Kentucky Bluegrass, and Perennial Ryegrass
Source:Fungicide and Nematicide Tests. Vol. 43, 1988, p. 273-274.
Publishing Information:St. Paul: American Phytopathological Society
Keywords:TIC Keywords: Poa pratensis; Agrostis stolonifera; Lolium perenne; Rhizoctonia solani; Brown patch
Abstract/Contents:"'Seaside' creeping bentgrass, 'Park' Kentucky bluegrass, and 'Premier' perennial ryegrass, which had been treated with the test fungicides by Gustafson, Inc., Dallas TX, were seeded into pasteurized sand in 10 cm plastic pots, and topdressed with Terragreen soil conditioner. A seeding rate of approximately six times the normal field rate was employed. To obtain a uniform grass stand across species, bentgrass was seeded at 0.25 g per pot, bluegrass at 1.0 g, and ryegrass at 1.75 g. Pots were kept moist with mist until emergence, after which grass was irrigated as required. Following emergence, grass was fertilized weekly with 20:20:20 soluble fertilizer. Inoculations were made at 10, 18, 21, 24, and 27 days post-seeding by placing uniform quantities of Rhizoctonia solani-infested ryegrain in the center of the grass area of pots. Following inoculation, pots were covered with individual polyethylene bags and placed on shaded greenhouse benches at 32-35 C until nontreated grass was completely blighted. Each treatment was replicated three times, and nontreated checks were included for comparison. Disease severity was evaluated by estimating percent blighting in each pot. Excellent control was obtained on all grasses through 17 days post-seeding with Rovral and the Apron/Rovral combination. Control on bluegrass and bentgrass was poor at 18 days and beyond. Efficacy was of much longer duration on perrennial ryegrass than on the other two grass species. This finding is probably related to the greater amount of fungicide present on the larger ryegrass seeds, and indicates that more concentrated fungicide formulations may be required for treating small-seeded grasses. Since these experiments were conducted in a sand growth medium, uptake and efficacy duration of test fungicides would be maximized and results cannot be extrapolated to field situations."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sanders, P. L., and M. D. Soika. 1988. Residual Efficacy of Fungicide Seed Treatments in Suppression of Rhizoctonia Solani on Seedling, Pot-Grown Creeping Pentgrass, Kentucky Bluegrass, and Perennial Ryegrass. Fungicide Nematicide Tests. 43:p. 273-274.
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