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http://dx.doi.org/10.5660/WTS.2017.6.2.151

Investigation of Fungicides Inhibitory Effect of on Summer Patch Disease, Caused by Magnaporthiopsis poae, in Kentucky bluegrass  

Lee, Jung Han (Korea Turfgrass Research Institute)
Shim, Gyu Yul (Korea Turfgrass Research Institute)
Kim, Jeong Ho (Korea Turfgrass Research Institute)
Jeon, Chang Wook (Dvision of Applied Life Science(BK21Plus) and Institute of Agriculture & Life Science, Gyeongsang National University)
Kwak, Youn-Sig (Dvision of Applied Life Science(BK21Plus) and Institute of Agriculture & Life Science, Gyeongsang National University)
Publication Information
Weed & Turfgrass Science / v.6, no.2, 2017 , pp. 151-156 More about this Journal
Abstract
Summer patch is the most serious disease at turfgrass field or golf course established with Kentucky bluegrass during high temperature season in Korea. Nevertheless, chemicals for the summer patch control are not yet registered in Korea. We isolated the pathogens from the turfgrass showing typical summer patch symptoms and identified as Magnaporthiopsis poae by using the internal transcribed spacer ITS1 and ITS4 sequences of rDNA. The inhibition rates of the pathogen were investigated for 10 fungicides. As results, the pathogen growth was suppressed when chemicals concentration increased and negatively correlated with incubation period with the chemicals. In triazole group, all chemicals (metconazole, myclobutanil, propiconazole and tebuconazole) treated showed the inhibition rates by 100%. Thiophanate-methyl showed the next highest inhibition effect against a summer patch pathogen. In strobilurin group, pyraclostrobin was the highest suppression effect compared with azoxystrobin and trifloxystrobin. Inhibition effect of fludioxonil and fluxapyroxad on pathogen was similar to the trifloxystrobin. Based on the results, triazole and carboxamide groups are strongly recommended due to the highest inhibition effect on the summer patch pathogen, Magnaporthiopsis poae.
Keywords
Fungicide; Kentucky bluegrass; Magnaporthiopsis poae;
Citations & Related Records
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