Efficacy of Fungicides for Control of Sclerotinia Stem Rot of Canola

Bradley, Carl A.; Lamey, H. A.; Endres, Gregory; Henson, Robert A.; Hanson, Bryan; McKay, Kent; Halvorson, M.; LeGare, D. G.; Porter, Paul M.

doi:10.1094/pd-90-1129

Cited by 48 publications

(27 citation statements)

References 10 publications

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“…Prothioconazole has shown great utility applied either alone (Dutzmann and Suty-Heinze, 2004;Jorgensen and Olsen, 2007) or in combination with strobilurin fungicides for control of cereal diseases in Europe (Dutzmann and Suty-Heinze, 2004) and control of pasmo (Septoria linicola) of flax (Halley et al, 2004), and Sclerotinia stem rot (Sclerotinia sclerotiorum) of canola (Bradley et al, 2006) in the U.S. Results of this study indicate that prothioconazole shows potential for enhanced leaf spot control in peanut compared with tebuconazole or chlorothalonil, and that it is effective in a variety of use patterns.…”

Section: Discussionmentioning

confidence: 99%

Management of Leaf Spot Diseases of Peanut With Prothioconazole Applied Alone or in Combination With Tebuconazole or Trifloxystrobin

Culbreath¹,

Kemerait²

2008

Peanut Science

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Field experiments were conducted in Tifton and Plains, GA in 2001-2007 to determine the efficacy of prothioconazole on early leaf spot (Cercospora arachidicola) and late leaf spot (Cercosporidium personatum) of peanut (Arachis hypogaea). In five of six experiments, application of one or both rates (0.18 and 0.20 kg ai/ha) of prothioconazole in sprays 3-6 (chlorothalonil at 1.26 kg ai/ha in sprays 1, 2, and 7) provided leaf spot control superior to tebuconazole (0.23 kg ai/ ha) in a similar regime, and superior to chlorothalonil at 1.26 kg ai/ha applied full season (seven times) in four of six experiments. In a similar series of six experiments, application of 0.085 kg ai/ha of prothioconazole + 0.17 kg ai/ha of tebuconazole provided better leaf spot control than tebuconazole (0.23 kg ai/ha) applied in regimes similar to those described above. Leaf spot control with prothioconazole + tebuconazole was similar to chlorothalonil applied at 1.26 kg ai/ ha full season in five of eight experiments, but was less effective in the remaining three experiments. Fungicide effects on yield were inconsistent, but in all experiments, yield response with either rate of prothioconazole was similar to or greater than that obtained with 0.23 kg ai/ha tebuconazole on the same schedule. In a third series of four experiments, full-season (seven sprays) application of mixtures of prothioconazole at 0.063 kg ai/ ha with trifloxystrobin at 0.063 kg ai/ha gave similar or better leaf spot control than chlorothalonil full season.

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Section: Discussionmentioning

confidence: 99%

Management of Leaf Spot Diseases of Peanut With Prothioconazole Applied Alone or in Combination With Tebuconazole or Trifloxystrobin

Culbreath¹,

Kemerait²

2008

Peanut Science

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“…Based upon results from experiments examining the effects of fungicides on S. sclerotiorum and on yield, Bradley et al (2006) stated that the pathogen rate of occurrence differed by year and location. A generally marked decrease in infection was recorded for the active ingredients azoxystrobin, benzyl, boscalid, iprodione, prothioconazole, tebuconazole, thiophanate-methyl, trifloxystrobin, and vinclozolin.…”

Section: Discussionmentioning

confidence: 99%

Effect of fungicide application date against Sclerotinia sclerotiorum on yield and greening of winter rape

Spitzer¹,

Matušinsky²,

Klemová³

et al. 2012

Plant Prot. Sci.

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Spitzer T., Matušinsky M., Klemová Z., Kazda J. (2012): Effect of fungicide application date against Sclerotinia sclerotiorum on yield and greening of winter rape. Plant Protect. Sci., 48: 105-109.In experiments with winter rape during 2004-2008, we examined the effectiveness of fungicides containing active ingredients based upon triazoles and SBI inhibitors (group A): flusilazole 250 g/l a.i., flusilazole 125 g/l a.i. + carbendazim 250 g/l a.i., and cyproconazole 120 g/l a.i. + carbendazim 300 g/l a.i. Fungicides based upon older and newer triazoles, strobilurins, and SDH inhibitors (group B) were also used: cyproconazole 80g/l a.i. + azoxystrobin 200 g/l a.i., prothioconazole 250 g/l a.i., prothioconazole 125 g/l a.i. + tebuconazole 125 g/l a.i., and boscalid 200 g/l a.i. + dimoxystrobin 200 g/l a.i. The application of group A fungicides against S. sclerotiorum during BBCH 65-69 growth stage had demonstratively higher effectiveness, while for group B the application date had no effect. The greening (or "stay-green") effect only occurred with group B. The correlation coefficient for greening effect and yield was r = −0.3033 for applications during BBCH 61-65 while it was r= −0.3542 for BBCH 65-69 stage, thus indicating a relatively weak relationship.

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“…Several chemical agents registered in the USA, Canada, Australia, Europe and China are available to this purpose. Their active ingredients are: boscalid, fluazinam, fluxapyroxad, pyraclostrobin, penthiopyrad, picoxystrobin, prothioconazole, prothioconazole and trifloxystrobin, tetraconazole, thiophanate methyl (Matheron and Porchas 2004;Bradley et al 2006;Zhou et al 2014aZhou et al , 2014bWang et al 2015;Derbyshire and Denton-Giles 2016). The effective control of S. sclerotiorum requires application of fungicides during sensitive time frames, the number of treatments depending on the length of the crop vegetation period and on how long flowers or petals are available for infection by ascospores (Heffer Link and Johnson 2007).…”

Section: Introductionmentioning

confidence: 99%

Biological control of the soil-borne fungal pathogen Sclerotinia sclerotiorum –– a review

2018

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Diseases caused by Sclerotinia sclerotiorum (Lib) de Bary are difficult to control and cause increasing losses of horticultural crops worldwide. Reasons of this phenomenon are various: (i) the specialization of crop production that causes the accumulation of the pathogen in the soil; (ii) the lack of a safe and efficient method of soil fumigation; (iii) the specific life cycle of S. sclerotiorum with survival structures (sclerotia), resistant to chemical and biological degradation. Sclerotinia diseases depend on many environmental factors which determine sclerotia survival and ascospores dissemination, because plants are mainly infected by air-borne ascospores from carpogenic germination of sclerotia. Due to the lack of effective synthetic agents for eradication of S. sclerortiorum from soil considerable interest has been focused on biological control, especially the selection of microorganisms with mycoparasitic activity towards S. sclerotiorum sclerotia, that can decrease their number in the soil. In this work we review reports on the use of different antagonistic fungi and bacteria in the control of S. sclerotiorum and discuss the suppressive effect of organic amendments against this soil-borne pathogen.

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Efficacy of Fungicides for Control of Sclerotinia Stem Rot of Canola

Cited by 48 publications

References 10 publications

Management of Leaf Spot Diseases of Peanut With Prothioconazole Applied Alone or in Combination With Tebuconazole or Trifloxystrobin

Management of Leaf Spot Diseases of Peanut With Prothioconazole Applied Alone or in Combination With Tebuconazole or Trifloxystrobin

Effect of fungicide application date against Sclerotinia sclerotiorum on yield and greening of winter rape

Biological control of the soil-borne fungal pathogen Sclerotinia sclerotiorum –– a review

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