Full TGIF Record # 44840
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Author(s):Yuen, Gary Y.; Giesler, Loren J.; Craig, Mischell L.
Author Affiliation:Yuen: Plant Pathologist; and Giesler: Plant Pathology Graduate Student, Turfgrass Science Team, University of Nebraska, Institute of Agriculture and Natural Resources
Title:Evaluation of fungal antagonists against Rhizoctonia solani in tall fescue
Section:Pest management
Other records with the "Pest management" Section
Source:Turfgrass Research Report - 1992 [Nebraska]. 1992, p. 49-50.
# of Pages:2
Publishing Information:[Lincoln, NE]: University of Nebraska
Keywords:TIC Keywords: Rhizoctonia solani; Disease control; Festuca arundinacea; Biological control organisms; Rhizoctonia
Abstract/Contents:The biological control agents CAG-B(o) (BN-1) (a binucleate Rhizoctonia sp), TrBG (an isolate of Glicladium), and Gliocadium virens GL-21 were tested for their effectiveness in controlling brown patch disease. The other objective was to examine the effects of repeated applications of BN-1 and TrBg and various delivery methods for GL-21 on biocontrol efficacy. The plots were rated for brown patch severity every 2 weeks through Sept. using one of two methods. One was a visual assessment of percentage of turf exhibiting blight. When disease levels were low, i.e. less than 20% blight in the control plots, the extent of brown patch lesion development within the canopy was rated with 1 sq ft areas on a 0 to 10 scale (0= no lesions, 10=most severe). The disease did not develop to expected levels during much of the season due to abnormally low temperatures. Blight severity over entire plots could be assessed only on 5 Aug and 21 Aug when disease severity was at its peak. The most effective treatment during period of both high and low disease development was the combination of BN-1 and TrBg, which had a mean disease severity of 20% versus 33% in the nontreated control. TrBg reduced disease severity during one reading, with there being no difference between 1 and 3 applications. GL-21 did not control the disease regardless of the delivery method or rate.
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Yuen, G. Y., L. J. Giesler, and M. L. Craig. 1992. Evaluation of fungal antagonists against Rhizoctonia solani in tall fescue. Turfgrass Res. Rep. Nebr. p. 49-50.
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