Abstract
Phytophthora root rot, caused by several species of Phytophthora, is an important disease of citrus in California and other growing regions. For chemical management, mefenoxam and potassium phosphite have been available for many years, and resistance in Phytophthora spp. has been reported for both compounds. We evaluated the efficacy of the new Oomycota fungicides ethaboxam, fluopicolide, mandipropamid, and oxathiapiprolin, each with a different mode of action, against Phytophthora root rot of citrus in field and greenhouse studies. Root balls of navel orange trees on 'Carrizo citrange' rootstock were inoculated with P. nicotianae at planting in the field in fall 2013. Applications with 11 fungicide treatments were made 5 weeks after planting, in spring and fall 2014, and in spring 2015. Feeder roots and adjacent soil were collected before or after application. All of the new fungicides significantly reduced root rot incidence and Phytophthora soil populations to very low levels as compared with the control starting after the first application. Mefenoxam was only effective when a high label rate was used in the fourth application. Selected treatments also increased tree canopy size, trunk diameter, and fruit yield as compared w...Continue Reading
References
Feb 4, 1999·Nature Medicine·H Kalter
Apr 12, 2003·Academic Radiology·J J SmithA H Matsumoto
Jan 1, 1996·Annual Review of Phytopathology·U Gisi, Y Cohen
Oct 16, 2004·Pest Management Science·Dal-Soo KimGoon-Ho Joe
May 10, 2005·Pest Management Science·Maho UchidaDal-Soo Kim
May 8, 2010·Molecular Plant Pathology·Mathias BlumRaymonde Fonne-Pfister
May 8, 2010·Journal of the American Academy of Dermatology·Graça M DoresCarlos A Garcia
Oct 5, 2011·CMAJ : Canadian Medical Association Journal = Journal De L'Association Medicale Canadienne·Robert J Fox
Apr 20, 2014·Science·Erich G ChapmanJeffrey S Kieft
Aug 19, 2014·Pest Management Science·Lili JiangKaiyun Wang
Sep 1, 2015·Bioorganic & Medicinal Chemistry·Robert J PasterisRichard A Berger
Nov 19, 2015·Pest Management Science·Jianqiang MiaoXili Liu
Oct 21, 2017·Phytopathology·Wei HaoJames E Adaskaveg
Jan 24, 2019·Plant Disease·Morgan A GrayJames E Adaskaveg
May 1, 2015·Plant Disease·Amanda SavilleJean Beagle Ristaino
Nov 1, 2014·Plant Disease·Pingsheng JiUnessee Hargett
Jan 1, 2013·Plant Disease·M D Meyer, M K Hausbeck
Sep 1, 2013·Plant Disease·J H GrahamM S Irey
Dec 1, 2011·Plant Disease·Xiao Hong LuJianjun J Hao
Jun 1, 2010·Plant Disease·J M Foster, M K Hausbeck
Feb 1, 2005·Plant Disease·J Hwang, D M Benson
Jan 1, 2003·Plant Disease·J H GrahamC W McCoy
Dec 1, 1999·Plant Disease·A J Ferguson, S N Jeffers
Feb 1, 1998·Plant Disease·L W TimmerS E Zitko
Citations
Jun 28, 2019·Plant Disease·Rodger J BelisleJames E Adaskaveg
Jul 2, 2020·Plant Disease·Shima ChaudharyVeronica Ancona
Aug 22, 2020·PloS One·Yigal Cohen, Avia E Rubin
Jan 14, 2020·PloS One·Yigal Cohen
Oct 21, 2020·Plant Disease·Morgan A GrayJames E Adaskaveg
Sep 5, 2020·Plant Disease·Wei HaoJames E Adaskaveg
Jun 16, 2021·Functional Plant Biology : FPB·Adielle R da SilvaAbelmon da S Gesteira
Jul 17, 2021·Plant Disease·M NyoniA McLeod