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Browsing by Author "Huang, Yongju"
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Analysing virulent and avirulent Leptosphaeria maculans isolates to understand R gene-mediated resistance in Brassica napus
Mitrousia, Georgia; Huang, Yongju; Hall, Avice; Fitt, Bruce D.L. (2012-10)Phoma stem canker (Leptosphaeria maculans) is a major disease on oilseed rape (Brassica napus) in Europe (e.g. it causes losses to UK farmers of > £100M p.a.). Single major gene resistance (R) in B. napus against L. maculans ... -
Assessing quantitative resistance against Leptosphaeria maculans (phoma stem canker) in Brassica napus (oilseed rape) in young plants : Assessing quantitative resistance to Leptosphaeria maculans
Huang, Yongju; Qi, Aiming; King, Graham J.; Fitt, Bruce D.L. (2014-01-15)Quantitative resistance against Leptosphaeria maculans in Brassica napus is difficult to assess in young plants due to the long period of symptomless growth of the pathogen from the appearance of leaf lesions to the ... -
Azole fungicide sensitivity and molecular mechanisms of reduced sensitivity in Irish Pyrenopeziza brassicae populations
Bucur, Diana; Huang, Yongju; Fitt, Bruce; Kildea, Stephen (2022-10-09)BACKGROUND: Light leaf spot, caused by Pyrenopeziza brassicae, is amongst the most damaging diseases of winter oilseed rape(Brassica napus), and currently the sterol 14⊍-demethylase (CYP51) inhibitors (azoles) represent ... -
Azole sensitivity in Leptosphaeria pathogens of oilseed rape: the role of lanosterol 14α-demethylase
Sewell, Thomas; J Hawkins, Nichola; Stotz, Henrik; Huang, Yongju; L Kelly, Steven; E Kelly, Diane; Fraaije, Bart; Fitt, Bruce (2017-11-20)Lanosterol 14-α demethy lase is a key enzyme intermediating the biosynthesis of ergosterol in fungi, and the target of azole fungicides. Studies have suggested that Leptosphaeria maculans and L. biglobosa, the causal ... -
Chemical warfare: the fungal quest to conquer oilseed rape
Fortune, James; Baker, Daniel; Stanley, James; Karandeni Dewage, Chinthani Shanika; Ritchie, Faye; Fitt, Bruce; Huang, Yongju (AFCP, 2021-06-16) -
Cloning of plant defensin and oxalic acid oxidase genes and expressions of these genes induced by pathogens and chemicals in Brassica napus.
Liu, S. Y.; Fitt, Bruce D.L.; Liu, R. H.; Evans, Neal; Dong, C. A.; Huang, Yongju (2004) -
Coexistence of related pathogen species on arable crops in space and time
Fitt, Bruce D.L.; Huang, Yongju; van den Bosch, Frank; West, Jon S. (2006)This review considers factors affecting the coexistence of closely related pathogen species on arable crops, with particular reference to data available at Rothamsted for Septoria tritici/Stagonospora nodorum (Mycosphaerella ... -
Colonization of winter oilseed rape tissues by A/Tox(+) and B/Tox(0) Leptosphaeria maculans (phoma stem canker) in France and England
West, Jon S.; Balesdent, M. H.; Rouxel, T.; Narcy, J. P.; Huang, Yongju; Roux, J.; Steed, J. M.; Fitt, Bruce D.L.; Schmit, J. (2002-06)The colonization of winter oilseed rape plants and epidemiology of phoma stem canker differed between A/Tox(+) and B /Tox(0) Leptosphaeria maculans. In France and England, where plant colonization was investigated during ... -
Combining R gene and quantitative resistance increases effectiveness of cultivar resistance against Leptosphaeria maculans in Brassica napus in different environments : Combining R gene and quantitative resistance against Leptosphaeria maculans
Huang, Yongju; Mitrousia, Georgia; Mohamed Sidique, Siti; Qi, Aiming; Fitt, Bruce (2018-05-23)Using cultivar resistance against pathogens is one of the most economical and environmentally friendly methods for control of crop diseases. However, cultivar resistance can be easily rendered ineffective due to changes ... -
Comparative epidemiology of Leptosphaeria maculans and L. biglobosa on oilseed rape in the UK
Huang, Yongju; Mitrousia, Georgia; Sidique, Siti Nordahliawate; Fitt, Bruce D.L. (2013-08)Phoma stem canker is a major disease problem on winter oilseed rape (Brassica napus) in the UK. The disease is caused by two closely related species, Leptosphaeria maculans and L. biglobosa. Previous epidemiology work has ... -
Comparison of Leptosphaeria biglobosa-induced and chemically induced systemic resistance to L-maculans in Brassica napus
Liu , ShengYi; Liu, RenHu; Latunde-Dada, Akinwunmi O.; Cools, Hans J.; Foster, Simon J.; Huang, Yongju; Fitt, Bruce D.L. (2007-04)Brassica napus (cv. Madrigal) seedlings pre-treated with ascospores of Leptosphaeria biglobosa or foliar sprays of either acibenzolar-S-methyl (ASM) or menadione sodium bisulphite (MSB) were challenge inoculated with L. ... -
Contrasting Responses of Rhizosphere Bacterial, Fungal, Protist and Nematode Communities to Nitrogen Fertilisation and Crop Genotype in Field Grown Oilseed Rape (Brassica napus)
Picot, Emma; C. Hale, Chris; Hilton, Sally; Teakle, Graham; Schäfer, Hendrik; Huang, Yongju; Perryman, Sarah; S. West, Jon; D. Bending, Gary (2021-04-08)The rhizosphere microbiome is considered to play a key role in determining crop health. However, current understanding of the factors which shape assembly and composition of the microbiome is heavily biased toward bacterial ... -
Current understanding of phoma stem canker and light leaf spot on oilseed rape in the UK
Huang, Yongju; Karandeni Dewage, Chinthani Shanika; Fitt, Bruce (University of Hertfordshire Press, 2021-06-16)Oilseed rape is the third most important arable crop in the UK. Phoma stem cankerand light leaf spot are two economically important diseases of this crop. These twodiseases cause annual yield losses of winter oilseed rape ... -
Development and maturation of the chasmothecia of Podosphaera aphanis on strawberry
Jin, X. L.; Hall, Avice; Huang, Yongju; Fitt, Bruce D.L. (2012) -
Disease management in oilseed rape: insights into the Brassica napus-Pyrenopeziza brassicae pathosystem
Karandeni Dewage, Chinthani Shanika; Qi, Aiming; Stotz, Henrik; Huang, Yongju; Fitt, Bruce (AFCP, 2021-06-16) -
Effectiveness of Rlm7 resistance against Leptosphaeria maculans (phoma stem canker) in UK winter oilseed rape cultivars
Mitrousia, Georgia; Huang, Yongju; Qi, Aiming; Mohamed Sidique, Siti; Fitt, Bruce (2018-08)The Rlm7 gene in Brassica napus is an important source of resistance for control of phoma stem canker on oilseed rape caused by the fungus Leptosphaeria maculans. This study shows the first report of L. maculans isolates ... -
Effects of a penthiopyrad and picoxystrobin fungicide mixtureon phoma stem canker (Leptosphaeria spp.) on UK winteroilseed rape
Sewell, Thomas; Moloney, Steven; Ashworth, Mike; Ritchie, Faye; Mashanova, Alla; Huang, Yongju; Stotz, Henrik; Fitt, Bruce (2016-07-01)In the UK, fungicides are often used to controlphoma stem canker on winter oilseed rape. Field trialswere established near Boxworth, Cambridgeshire for fourcropping seasons (2011/2012, 2012/2013, 2013/2014 and2014/15) to ... -
Effects of cultivar resistance and fungicide application on stem canker of oilseed rape (Brassica napus) and potential interseasonal transmission of Leptosphaeria spp. inoculum
Fortune, James A.; Qi, Aiming; Ritchie, Faye; Karandeni Dewage, Chinthani Shanika; Fitt, Bruce; Huang, Yongju (2021-12)Phoma stem canker is a damaging disease of oilseed rape (Brassica napus) that causesannual yield losses to UK oilseed rape growers worth approximately £100 million,despite the use of fungicides. In the UK, oilseed rape is ... -
Effects of different fungicides on the severity of phoma stem canker
Sewell, Thomas; Huang, Yongju; Stotz, Henrik; Ashworth, Mike; Walker, Philip; Ritchie, Faye; Fitt, Bruce D.L. (2014)Phoma stem canker, a disease of oilseed rape (Brassica napus) caused by sibling pathogens Leptosphaeria maculans and L. biglobosa. Both pathogens follow a monocylic disease cycle that causes leaf spotting in autumn/winter ... -
Effects of fungicide on growth of Leptosphaeria maculans and L. biglobosa (phoma stem canker) in oilseed rape
Huang, Yongju; Hood, J. R.; Rossall, S.; Ashworth, M.; King, G.; Fitt, Bruce D.L. (2011)Controlled environment (CE) and field experiments were done to investigate effects of fungicide on growth of L. maculans and L. biglobosa in relation to development of phoma leaf spots and phoma stem canker on oilseed rape. ...