Abstract
The baseline sensitivities for mycelial growth of foliar fungal pathogens of citrus, Colletotrichum acutatum, Alternaria alternata, Elsinoe fawcettii, Diaporthe citri, and Mycosphaerella citri, the causal agents of postbloom fruit drop, brown spot of tangerine, citrus scab, melanose, and greasy spot, respectively, were determined in vitro for azoxystrobin, pyraclostrobin, and fenbuconazole. The effective dose to reduce growth by 50% (ED50 values) was determined for each pathogen-fungicide combination using five isolates from different citrus areas of Florida and eight fungicide concentrations. A discriminatory dose for each combination was selected near the ED50, and the range of sensitivity of 50 to 62 isolates of each fungal species was determined. The effect of salicylhydroxamic acid (SHAM) on the sensitivity of the five fungal species to azoxystrobin and pyraclostrobin was determined. Since mycelial growth of A. alternata was insensitive to azoxystrobin, the effect of that fungicide with and without SHAM on spore germination was assessed. The ED50 values for most fungal pathogens of citrus were relatively high compared with foliar pathogens of other tree crops. Values for azoxystrobin ranged from a low of 0.06 μg/ml with E....Continue Reading
References
Jun 24, 2000·Anaesthesia·J M Da FonsecaJ A Pook
Jul 31, 2002·Pest Management Science·Dave W BartlettBob Parr-Dobrzanski
Mar 4, 2003·Current Genetics·Cruz Avila-Adame, Wolfram Köller
Oct 24, 2008·Phytopathology·Helga FörsterJames E Adaskaveg
Oct 24, 2008·Phytopathology·S N MondalL W Timmer
Oct 24, 2008·Phytopathology·T L PeeverL W Timmer
Dec 1, 2003·Plant Disease·Cruz Avila-AdameWolfram Köller
Feb 1, 2004·Plant Disease·N A R PeresL W Timmer
Feb 1, 2004·Plant Disease·J S PascheN C Gudmestad
Apr 1, 2004·Plant Disease·S N MondalL W Timmer
Aug 1, 2003·Plant Disease·M T McGrath, N Shishkoff
Feb 1, 2003·Plant Disease·S N Mondal, L W Timmer
Mar 1, 2002·Plant Disease·P Vincelli, E Dixon
Apr 1, 2002·Plant Disease·Francis P Wong, Wayne F Wilcox
Nov 1, 2000·Plant Disease·P M Bushong, L W Timmer
Mar 1, 2000·Plant Disease·Francis P Wong, Wayne F Wilcox
Mar 1, 1999·Plant Disease·Gilberto Olaya, Wolfram Köller
May 1, 1999·Plant Disease·Y CanihosL W Timmer
May 1, 1999·Plant Disease·P S McManusB L Leininger
Feb 1, 1997·Plant Disease·Katherine L ReynoldsPaul F Bertrand
Citations
Jun 5, 2019·Plant Disease·Hongjie LiangFu-Xing Zhu
Jan 1, 2020·Plant Disease·Keevan J MacKenzieGary E Vallad
Apr 23, 2020·Plant Disease·Andre B GamaLilian Amorim
Jun 3, 2009·Pest Management Science·Anthony P Keinath
Jan 1, 2016·3 Biotech·Suren Samuelian
Dec 1, 2014·Plant Disease·Lydia Tymon, Dennis A Johnson
Jan 1, 2014·Plant Disease·Byron Vega, Megan M Dewdney
Jul 8, 2020·Scientific Reports·Fatemeh KhodadadiSrđan G Aćimović
Nov 1, 2012·Plant Disease·L A MilesA M C Schilder
Feb 6, 2020·Phytopathology·Jeffery A DeLongRachel P Naegele
Jan 21, 2015·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Biljana MirkovićPetar Vukša
Jul 18, 2017·Frontiers in Plant Science·Ayodeji S OwatiMary Burrows
Jul 19, 2018·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Mengran YangJie Liu
Sep 1, 2007·Plant Disease·K D BrodersA E Dorrance
May 1, 2010·Plant Disease·Y K Kim, C L Xiao
Jun 21, 2019·PloS One·Tamieka Lee PearceJason Barry Scott
Jun 1, 2014·Plant Disease·Martha HincapieMegan M Dewdney
Oct 1, 2011·Plant Disease·Roland W S Weber
May 1, 2009·Plant Disease·K A WiseN C Gudmestad
Jun 1, 2007·Plant Disease·K D BrodersA E Dorrance
Sep 1, 2012·Plant Disease·Byron VegaMegan M Dewdney
Dec 1, 2007·Plant Disease·S N MondalL W Timmer
Oct 19, 2017·Environmental Science and Pollution Research International·Adrian DubaMarian Wiwart
Jan 1, 2016·Plant Disease·Robyne BownessStephen E Strelkov
Dec 1, 2007·Plant Disease·A Rebollar-AlviterM A Ellis
Aug 1, 2012·Plant Disease·Dolores Fernández-OrtuñoGuido Schnabel
Apr 1, 2007·Plant Disease·S N MondalL W Timmer
Aug 3, 2018·Plant Disease·D R Cruz JimenezL F S Leandro
Jun 1, 2010·Plant Disease·A AmiriG Schnabel
Aug 9, 2020·Plant Disease·S A AlzohairyT D Miles
Oct 2, 2020·Plant Disease·Navjot KaurHillary L Mehl
Nov 19, 2020·Plant Disease·Tonima IslamHadley R Kutcher