Full TGIF Record # 24494
Item 1 of 1
Publication Type:
i
Report
Author(s):Brede, A. D.; Williams, R. R.
Author Affiliation:Jacklin Seed Company
Title:Control of ergot in Kentucky bluegrass seed production, 1991
Source:Fungicide and Nematicide Tests. Vol. 47, 1992, p. 296.
Publishing Information:St. Paul, MN: American Phytopathological Society
Keywords:TIC Keywords: Poa pratensis; Ergot; Claviceps purpurea; Control; Seed production
Abstract/Contents:"Fungicides were evaluated at the Satchwell farm seed production field of Plush Kentucky bluegrass, located north of Post Falls, Idaho. Plots were 10 x 20 ft replicated 4 times in a randomized block design. Treatments were applied at anthesis (12 June) using a CO2-driven, four nozzle boom sprayer, operating at 30 psi. Treatments were evaluated on 8 July by grasping the inflorescences and feeling for sticky "honeydew." Ergot sclerotia were counted per 100 randomly selected mature seedheads per plot, harvested 17 July. Weight of seed and ergot sclerotia per 100 seedheads and percent germination were taken on the same heads. Germination after 7 and 21 days was determined following seed cleaning, employing standard AOSA methods, with 100 seeds in one dish per plot replicated 4 times. Spray application of the surfactant was difficult at the low carrier rate due to the viscosity of the product. Phytotoxicity was noted for R-11 which, presumably, resulted in reductions in seed yield and germination. Our previous work (reported in F&N Tests) has indicated that other surfactants may reduce ergot severity without the degree of phytotoxicity of R-11. R-11 surfactant, and Prochloraz and San-619 fungicides significantly reduced ergot severity. Although none of the treatments gave 100% control, the better ones approached one-tenth the disease severity of the control, which should be sufficient for commercial production of Kentucky bluegrass seed."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brede, A. D., and R. R. Williams. 1992. Control of ergot in Kentucky bluegrass seed production, 1991. Fungicide Nematicide Tests. 47:p. 296.
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