Potential of NanoPro to reduce fungicide rate for control ofMicrodochium nivaleon an annual bluegrass (Poa annua) green

Tatsiana Espevig,Trond O Pettersen,Trygve S Aamlid,Y Tokarev,V Glupov

doi:10.1051/bioconf/20201800007

Tatsiana Espevig, Trond O Pettersen + Show 3 more

Open Access

https://doi.org/10.1051/bioconf/20201800007

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Abstract

This is a report on the potential of NanoPro™to reduce the rate of two commonly used fungicides for control of Microdochium patch (Microdochium nivale), the economically most important turfgrass disease in Scandinavia. The experiment was conducted from 14 Sept. 2018 to 1 May 2019 on an annual bluegrass golf green at the NIBIO Turfgrass Research Center Landvik. Use of NanoPro™at a rate of 292 ml/ha in tank mixture with the systemic fungicide Delaro® SC 325 or/and the contact fungicide Medallion® TL produced the same level of disease control with a 30-60% reduction in fungicide dosage as with full fungicide dosage without additive. NanoPro™was more effective with Medallion® TL than with Delaro® SC 325. We conclude that NanoPro™may have a big potential in Scandinavia and other countries where authorities require reduced fungicide use. The experiment should be repeated one more year before giving final recommendations.

Highlights

Microdochium patch is the economically most important disease in turfgrass in Scandinavia
When applied without NanoProTM, 100%, 70% and 40% rate of Delaro plus Medalion reduced Microdochium patch by 94%, 82% and only 31%, respectively, as compared with unsprayed plots
NanoProTM in tank mixture with 70% fungicide dosage rate led to 11% and 15% higher Microdochium patch reduction when used with Delaro and Medallion, respectively, but differences were not significant

Summary

Introduction

Microdochium patch is the economically most important disease in turfgrass in Scandinavia. On golf greens with susceptible species and winter conditions favourable for snow moulds the damage from Microdochium patch can be up to 100% [1]. The use of systemic and contact fungicides in fall is necessary to protect golf greens from severe snow mould damage. Humates are natural organic substances, high in humic acids and often containing trace minerals necessary for plants [2]. Humates are an important soil component because they constitute a stable fraction of carbon and improve water holding capacity and pH buffering [3]. To the best of our knowledge, there are no reports on use of humic acid as additives to fungicides for Microdochium patch control on golf greens

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