Shift in Sensitivity of Alternaria solani in Response to Qo I Fungicides

Plant Disease
J S PascheN C Gudmestad

Abstract

Isolates of Alternaria solani, cause of potato early blight, collected in 1998 through 2001 from various potato growing areas across the midwestern United States, were tested for sensitivity to azoxystrobin. Isolates collected in 1998, prior to the introduction of azoxystrobin, were tested to establish the baseline sensitivity of the fungus to this fungicide. Isolates collected in subsequent years, not necessarily from the same sites as baseline isolates, were tested to determine if populations of A. solani had become less sensitive to azoxystrobin. Azoxystrobin sensitivity was determined utilizing an in vitro spore germination assay. The effective fungicide concentration that inhibited spore germination by 50% (EC50) was determined for each isolate. There was no significant difference in mean EC50 values between baseline isolates and all other isolates collected through 1999. Mean azoxystrobin EC50 values of A. solani isolates collected in 2000 and 2001 were significantly higher compared with means from previous years, and mean azoxystrobin EC50 values from 2001 were significantly higher than means from isolates collected in 2000. A subset of 54 A. solani isolates was evaluated in vitro for cross-sensitivity to pyraclostrobin ...Continue Reading

Citations

Sep 12, 2019·Plant Disease·S K R YellareddygariNeil C Gudmestad
Jan 24, 2019·Plant Disease·Mitchell J Bauske, Neil C Gudmestad
Jan 24, 2019·Plant Disease·Mitchell J BauskeNeil C Gudmestad
Aug 28, 2019·Plant Disease·Ryan M HumannSamuel G Markell
Sep 22, 2017·International Journal of Molecular Sciences·Pragya AdhikariDilip R Panthee
Nov 1, 2015·Plant Disease·Paul P PriceSebastian Albu
Nov 1, 2014·Plant Disease·Lynn Esther E RallosAnton B Baudoin
Dec 18, 2013·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Sujoy SahaA B Rai
Jan 1, 2016·Plant Disease·Robyne BownessStephen E Strelkov
Jul 1, 2013·Plant Disease·N C GudmestadJ S Pasche
Jan 1, 2012·Plant Disease·J H Leiminger, H Hausladen
Dec 1, 2016·Plant Disease·Sahar Arabiat, Mohamed F R Khan
Oct 19, 2017·Environmental Science and Pollution Research International·Adrian DubaMarian Wiwart
Feb 12, 2019·Plant Disease·Weiya XueXinshun Qu

❮ Previous
Next ❯

Related Concepts

Related Feeds

Antifungals

An antifungal, also known as an antimycotic medication, is a pharmaceutical fungicide or fungistatic used to treat and prevent mycosis such as athlete's foot, ringworm, candidiasis, cryptococcal meningitis, and others. Discover the latest research on antifungals here.