Effects of fungicides onin vitrospore germination and mycelial growth of the phytopathogensLeptosphaeria maculansandL. biglobosa(phoma stem canker of oilseed rape)

Eckert, Mária; Rossall, S.; Selley, A.; Fitt, Bruce D.L.

doi:10.1002/ps.1890

Cited by 45 publications

(48 citation statements)

References 34 publications

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“…Efficacy of triazole fungicide metconazole was likely to have also been influenced by the proportions of L. maculans and L. biglobosa, the 2 coexisting Leptosphaeria species on oilseed rape in Lithuania (Brazauskienė et al, 2011b). It was shown by Eckert et al (2010) and Huang et al (2011) that triazole fungicides flusilazole and tebuconazole were more effective against L. maculans than against L. biglobosa. Winter rape cultivars showed significant differences in their susceptibility to basal phoma canker and upper stem lesions; however, neither of the cultivars showed high resistance to this disease.…”

Section: Discussionmentioning

confidence: 99%

Susceptibility of winter rape cultivars to fungal diseases and their response to fungicide application

Brazauskienė¹,

Petraitienė²,

Brazauskas³

et al. 2013

Turk J Agric For

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Section: Discussionmentioning

confidence: 99%

Susceptibility of winter rape cultivars to fungal diseases and their response to fungicide application

Brazauskienė¹,

Petraitienė²,

Brazauskas³

et al. 2013

Turk J Agric For

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“…The tested fungicides were diluted in DMSO (dimethyl sulfoxide; Lachner, Neratovice, Czech Republic) and added to PDA to give the following concentration levels: 16, 8, 4, and 2 µl/ml of PDA (Eckert et al 2009) where 2 µl/ml corresponded to 80% of the registered dose rate of the fungicide Horizon 250 EW (and/or of Efilor, Propulse, and Prosaro 250 EC) and 400 l of water used as a spray solution per hectare. The concentration level 16 µl/ml of fungicide in PDA was very close to the double dose of Horizon 250 EW diluted in 150 l/ha of water, the dose rate used for phytotoxicity testing.…”

Section: Methodsmentioning

confidence: 99%

Control of plant sap-sucking insects using entomopathogenic fungi Isaria fumosorosea strain (Ifu13a)

Ali¹,

Cao²,

Wang³

et al. 2018

Plant Prot. Sci.

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Poslušná J. Plachká E., Mazáková J. (2018): Influence of selected fungicides registered in the Czech Republic for winter oilseed rape on in vitro Sclerotinia sclerotiorum mycelial growth. Plant Protect. Sci., 54: 101-110.The baseline sensitivity of 55 isolates of Sclerotinia sclerotiorum, collected from oilseed rape in 6 regions of the Czech Republic, to selected fungicides was determined during the period 2013-2015. One single-component fungicide -Horizon (tebuconazole), and four multicomponent fungicides -Pictor (boscalid, dimoxystrobin), Efilor (boscalid, metconazole), Prosaro 250 EC (prothioconazole, tebuconazole), and Propulse (fluopyram, prothioconazole), were chosen as these are commonly used locally. The effect of each fungicide on the in vitro pathogen radial mycelial growth and EC 50 values for the respective fungicides were determined. The following MIC values were estimated; for the fungicides Horizon 250 EW, Efilor, and Propulse the mean MIC values ranged between 0.125 and 0.250 µl/ml, for Prosaro 250 EC ranged between 0.0625 and 0.125 µl/ml, and for Pictor ranged from 0.00781 to 0.01562 µl/ml. No strains of S. sclerotiorum resistant to the tested fungicides were detected and the growth of all isolates was fully inhibited at concentrations corresponding to their registered dose rates. The highest fungicidal efficacy on the collected S. sclerotiorum isolates was recorded for Pictor, followed by Prosaro 250 with an EC 50 value 0.05856 µl/ml and then the remaining fungicides Propulse, Efilor, and Horizon 250 EW (EC 50 values 0.07277, 0.07221, and 0.08519 µl/ml, respectively).

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“…A few studies have investigated the effect of fungicide on L. maculans and L. biglobosa, and most of these studies revealed that L. maculans was more sensitive to fungicides than L. biglobosa (Griffiths et al 2003;Eckert et al 2010;Huang et al 2011). Among different L. maculans isolates, variations in sensitivity to QoI fungicides (fungicides with the action mode of action of Quinone outside inhibitor) were observed in Canada (Liu 2014).…”

Section: Integrated Blackleg Management Strategiesmentioning

confidence: 99%

Insights into fighting against blackleg disease of Brassica napus in Canada

Zhang

Fernando

2018

Crop Pasture Sci.

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Abstract. Blackleg disease, caused by the ascomycete fungal pathogen Leptosphaeria maculans, is a devastating disease of canola (Brassica napus) in Australia, Canada and Europe. Although cultural strategies such as crop rotation, fungicide application, and tillage are adopted to control the disease, the most promising disease control strategy is the utilisation of resistant canola varieties. However, field populations of L. maculans display a high evolutionary potential and are able to overcome major resistance genes within a few years, making disease control relying on resistant varieties challenging. In the early 1990s, blackleg resistance gene Rlm3 was introduced into Canadian canola varieties and provided good resistance against the fungal populations until the early 2000s, when moderate to severe blackleg outbreaks were observed in some areas across western Canada. However, the breakdown of Rlm3 resistance was not reported until recently, based on studies on R genes present in Canadian canola varieties and the avirulence allele frequency in L. maculans populations in western Canada. The fact that Rlm3 was overcome by the evolution of fungal populations demands canola breeding programs in Canada to be prepared to develop canola varieties with diversified and efficient R genes. In addition, frequent monitoring of fungal populations can provide up-to-date guidance for proper resistance genes deployment. This literature review provides insights into the outbreaks and management of blackleg disease in Canada.

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Effects of fungicides onin vitrospore germination and mycelial growth of the phytopathogensLeptosphaeria maculansandL. biglobosa(phoma stem canker of oilseed rape)

Abstract: These results suggest that fungicide applications might affect the structure of L. maculans/L. biglobosa populations in UK winter oilseed rape crops.

Cited by 45 publications

References 34 publications

Susceptibility of winter rape cultivars to fungal diseases and their response to fungicide application

Susceptibility of winter rape cultivars to fungal diseases and their response to fungicide application

Control of plant sap-sucking insects using entomopathogenic fungi Isaria fumosorosea strain (Ifu13a)

Insights into fighting against blackleg disease of Brassica napus in Canada

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