Fluopyram Suppresses Population Densities of Heterodera glycines in Field and Greenhouse Studies in Michigan

Plant Disease
Mitchell G RothMartin I Chilvers

Abstract

The soybean cyst nematode (SCN), Heterodera glycines Ichinohe, causes significant damage to soybean production annually. Fluopyram is a fungicide commonly used in soybean seed treatments intended to control soilborne fungal pathogens; however, recent studies have also suggested inhibitory effects on SCN. We examined the effects of a fluopyram seed treatment, ILeVO, on SCN reproduction, sudden death syndrome (SDS) development, and yield in a 3-year field study. Overall, fluopyram had a significant effect on yield (P = 0.046) and end-of-season SCN eggs and second-stage juveniles (Pf, P = 0.033) but no significant effect on SCN reproduction (Rf) or SDS disease index (P > 0.05). Post hoc tests indicated that fluopyram increased yield and suppressed SCN quantities. However, Rf was consistently greater than 1 whether or not the seed was treated with fluopyram, indicating that SCN populations were still increasing in the presence of fluopyram. A follow-up greenhouse study indicated that fluopyram reduced SCN relative to nontreated controls, as observed in the field, but only reduced SCN DNA within roots of a susceptible cultivar. These results indicate that fluopyram can suppress SCN quantities relative to nontreated seed but may not ...Continue Reading

References

Jan 13, 1999·Molecular Plant-microbe Interactions : MPMI·X WangE Davis
May 18, 2006·Annual Review of Phytopathology·T L NiblackG L Tylka
May 23, 2013·The New Phytologist·Melissa G MitchumEric L Davis
Jan 9, 2017·G3 : Genes - Genomes - Genetics·Michael GardnerMelissa G Mitchum
Apr 1, 2017·Plant Disease·Jie WangMartin I Chilvers
Jul 1, 2016·Plant Disease·Yuba R KandelDaren S Mueller
May 16, 2019·Phytopathology·Mitchell G RothMartin I Chilvers

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Citations

Apr 9, 2021·Journal of Nematology·Qing-Qing LiChao-Bin Xue

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