Efficacy of <i>Clonostachys rosea</i> strain ACM941 and fungicide seed treatments for controlling the root rot complex of field pea

Xue, Allen

doi:10.4141/p02-078

Cited by 23 publications

(15 citation statements)

References 9 publications

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“…Strain ACM941 of C. rosea was previously reported to be a mycoparasite of a number of fungal plant pathogens (Xue 2002(Xue , 2003a(Xue , 2003b, but it has not been shown to produce any antifungal compounds. Inhibition of growth (clear zones) was observed between the colonies of G. zeae and strain ACM941 in the dual-culture experiments, as was the suppression of spore germination in the coculture experiments in the present study.…”

Section: Discussionmentioning

confidence: 99%

“…Schroers, Samuels, Serfert and Gams (syn. Gliocladium roseum Bainier), strain ACM941 (American Type Culture Collection ATCC 74447), was identified as a mycoparasite of certain fungal pathogens in plants (Xue 2002(Xue , 2003a(Xue , 2003b. When applied as a seed treatment, strain ACM941 provided protection against a number of fungal pathogens under both growth-room and field conditions (Xue 2000(Xue , 2001(Xue , 2002.…”

Section: Introductionmentioning

confidence: 99%

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Biological control of fusarium head blight of wheat withClonostachys roseastrain ACM941

Hue

Voldeng

Savard

et al. 2009

Canadian Journal of Plant Pathology

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Fusarium head blight (FHB), caused by Gibberella zeae, is a devastating disease of wheat. A strain of Clonostachys rosea, ACM941 (American Type Culture Collection ATCC 74447), was evaluated for antibiosis against G. zeae in vitro and for control of FHB under greenhouse and field conditions in comparison to the registered fungicide Folicur (tebuconazole). Strain ACM941 reduced mycelial growth of the pathogen by 52.6% in dual-culture after 6 days and completely suppressed spore germination for 6 h when cocultured with a macroconidial suspension of G. zeae. Strain ACM941 reduced G. zeae perithecial production by more than 99% in a leaf disk assay, 60%-77% on infected corn kernels, and 32%-57% on spikelet debris in the field. These effects were significant (P < 0.05) and not statistically different from those produced by tebuconazole. When strain ACM941 was sprayed onto wheat heads 2 days prior to inoculation with G. zeae, it significantly reduced infected spikelets (IS) by 64% and Fusarium-damaged kernels (FDK) by 65% in greenhouse experiments. Under simulated disease epidemic conditions during 2005-2007, strain ACM941 reduced the FHB index by 58%, IS by 46%, FDK by 49%, and deoxynivalenol (DON) in kernels by 21%. These effects were significant but lesser in magnitude than those achieved by tebuconazole, which reduced FHB index by 97%, IS by 82%, FDK by 73%, and DON by 62%. Results from this research suggest that strain ACM941 of C. rosea is a promising biocontrol agent against G. zeae and may be used as a control measure in an integrated FHB management program. Key words: biological control, Gibberella zeae, fusarium head blight, Clonostachys rosea, wheat. Xue et al.: fusarium head blight / biological control / Clonostachys rosea 179 Résumé : La fusariose de l'épi (FHB), causée par Gibberella zeae, est une maladie dévastatrice qui s'attaque au blé. La souche ACM941 (ATCC 74447) de Clonostachys rosea a été évaluée, in vitro, sur le plan de l'antibiose pour lutter contre G. zeae et, en serre et au champ, pour lutter contre la FHB afin d'en comparer les effets à ceux du traitement fongicide homologué Folicur (tébuconazole). Au bout de six jours, lors de tests en culture duale, la souche ACM941 a réduit de 52,6 % la croissance mycélienne de l'agent pathogène et en a entièrement inhibé la germination des spores pendant six heures lorsqu'on l'a fait croître en présence d'une suspension macroconidiale de G. zeae. Lors d'un test biologique sur disque foliaire, la souche ACM941 a réduit la production périthéciale de plus de 99 %, de 60 % à 77 % lors d'un test sur des grains de maïs et de 32 % à 57 %, au champ, lors d'un test sur des débris d'épillets. Ces résultats étaient significatifs (P < 0,05) et semblables statistiquement à ceux obtenus avec le tébuconazole. Lorsque, au cours d'expériences menées en serres, la souche ACM941 a été pulvérisée sur des épis de blé deux jours avant de les inoculer avec G. zeae, les taux d'infection des épillets (IE) et les dommages subits par les grains affectés par Fusarium (DGF) ont été s...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biological control of fusarium head blight of wheat withClonostachys roseastrain ACM941

Hue

Voldeng

Savard

et al. 2009

Canadian Journal of Plant Pathology

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“…In vegetables, however, to which legumes belong, most field studies with seed application of bacteria or fungi have been conducted to control soilborne pathogens (e.g. Keinath et al 2000;Xue 2003), and not seedborne pathogens.…”

Section: Introductionmentioning

confidence: 99%

Control of seed-borne pathogens on legumes by microbial and other alternative seed treatments

et al. 2008

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“…These synergistic or additive effects may be due to the combination of mechanisms that affect both R. solani and the host plant as opposed to only the efficacy provided by fungicide or bioagent alone. Further research is needed to determine the combination of different fungicides with a bioagent for possible enhanced effectiveness (Kiewnick et al 2001;Xue 2003).…”

Section: Discussionmentioning

confidence: 99%

Effect of seed treatments on emergence, yield, and root rot severity of soybean under Rhizoctonia solani inoculated field conditions in Ontario

Xue¹,

Cober²,

Morrison³

et al. 2007

Can. J. Plant Sci.

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. 2007. Effect of seed treatments on emergence, yield, and root rot severity of soybean under Rhizoctonia solani inoculated field conditions in Ontario. Can. J. Plant Sci. 87: 167-173. Field trials were conducted with soybean at two sites each year from 2001 to 2003 in Ottawa, ON, to determine the effect of seed treatments with various combinations of seven formulated fungicides and the bioagent Yield Shield (Bacillus pumilus GB34) under Rhizoctonia solani inoculated conditions. Controls were untreated seed planted into both non-inoculated (natural) soil and soil inoculated with R. solani. Compared with the non-inoculated control, inoculation significantly increased root rot severity and reduced emergence by 27%, and yield by 31%. Under the inoculated conditions, none of the seed treatments significantly increased emergence or yield in all of the six trials when compared with the control. Allegiance (metalaxyl) plus Vitaflo-280 (carbathiin plus thiram) and Vitaflo-280 alone were the most effective seed treatments, increasing emergence in by 20 and 19% and yield by 21 and 26%, which were significantly better than the control in four and five trials for emergence and three and four trials for yield, respectively. Allegiance plus HEC5725 (HEC5725), Apron Maxx RTA (fludioxonil plus metalaxyl), and Maxim 480FS (fludioxonil) increased both emergence and yield in two trials and TFL RTU (metalaxyl plus trifloxystrobin) plus Yield Shield in one trial. There was no difference between seed treatment with Allegiance and the untreated control for all parameters, confirming that metalaxyl is ineffective to R. solani. It is concluded that carbathiin, thiram, HEC5725, fludioxonil and trifloxystrobin are effective active ingredients protecting soybean from soil-borne R. solani and increasing plant emergence and yield.

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Efficacy of Clonostachys rosea strain ACM941 and fungicide seed treatments for controlling the root rot complex of field pea

Cited by 23 publications

References 9 publications

Biological control of fusarium head blight of wheat withClonostachys roseastrain ACM941

Biological control of fusarium head blight of wheat withClonostachys roseastrain ACM941

Control of seed-borne pathogens on legumes by microbial and other alternative seed treatments

Effect of seed treatments on emergence, yield, and root rot severity of soybean under Rhizoctonia solani inoculated field conditions in Ontario

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