AI Article Synopsis

  • Sclerotinia stem rot (SSR), caused by Sclerotinia sclerotiorum, impacts canola yields in North Dakota and Minnesota, prompting field trials from 2000 to 2004 to assess the effectiveness of foliar fungicides.
  • Fungicides like azoxystrobin, benomyl, and others demonstrated a consistent ability to reduce SSR incidence compared to untreated controls, although reductions did not always lead to improved canola yields.
  • Results showed that different application timings based on the bloom stage did not consistently affect SSR management, suggesting that other factors should also inform the timing of fungicide applications.

Article Abstract

Sclerotinia stem rot (SSR), incited by Sclerotinia sclerotiorum, causes yield reductions to canola (Brassica napus) grown in North Dakota and Minnesota. Field trials were conducted in North Dakota and Minnesota from 2000 to 2004 to evaluate the effect of foliar fungicides on SSR and canola yield. Levels of SSR varied among years and location. In general, fungicides that consistently reduced SSR incidence compared with an untreated control were azoxystrobin, benomyl, boscalid, iprodione, prothioconazole, tebuconazole, thiophanate-methyl, trifloxystrobin, and vinclozolin. Significant reductions in SSR incidence with fungicides did not always translate into differences in canola yield, however. Inconsistent results were observed with different timings of applications based on percent bloom. This indicates that application timing should be based on factors in addition to percent bloom.

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Source
http://dx.doi.org/10.1094/PD-90-1129DOI Listing

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