Influence of Harvest Timing, Fungicides, and Beet necrotic yellow vein virus on Sugar Beet Storage

Abstract

Root rots in sugar beet storage can lead to multimillion dollar losses because of reduced sucrose recovery. Thus, studies were conducted to establish additional fungicide treatments for sugar beet storage and a greater understanding of the fungi involved in the sugar beet storage rot complex in Idaho. A water control treatment and three fungicides (Mertect [product at 0.065 ml/kg of roots; 42.3% thiabendazole {vol/vol}], Propulse [product at 0.049 ml/kg of roots; 17.4% fluopyram and 17.4% prothioconazole {vol/vol}], and Stadium [product at 0.13 ml/kg of roots; 12.51% azoxystrobin, 12.51% fludioxonil, and 9.76% difenoconozole {vol/vol}]) were investigated for the ability to control fungal rots of sugar beet roots held up to 148 days in storage during the 2012 and 2013 storage seasons. At

A Novel Penicillium sp. Causes Rot in Stored Sugar Beet Roots in Idaho

“…Four Penicillium isolates (F727, F728, F730, and F732) were collected on 8 February 2013 from necrotic lesions on commercial sugar beet roots that were part of a previous storage study (Strausbaugh et al 2015). The isolation methods were described previously (Strausbaugh et al 2015).…”

“…P. claviformae Bainer), and Phoma betae A. B. Frank (Bugbee 1982;Bugbee and Cole 1976;Campbell and Bugbee 1993;Liebe and Varrelmann 2014;Miles et al 1977;Mumford and Wyse 1976;Nihlgård et al 2009;Strausbaugh et al 2009Strausbaugh et al , 2015Toda et al 2012).…”

“…Penicillium roqueforti Thom and P. paneum have also been isolated from ensiled hard-pressed beet fibers (Boysen et al 2000). Recently Penicillium isolates from lesions on sugar beet roots in Idaho differed from previously acknowledged species based on phylogenetic analysis (Strausbaugh et al 2015). This novel pathogenic Penicillium species was established using a polyphasic taxonomic approach suggested by Visagie et al (2014) …”

“…P. claviformae Bainer), and Phoma betae A. B. Frank (Bugbee 1982;Bugbee and Cole 1976;Campbell and Bugbee 1993;Liebe and Varrelmann 2014;Miles et al 1977;Mumford and Wyse 1976;Nihlgård et al 2009;Strausbaugh et al 2009Strausbaugh et al , 2015Toda et al 2012).Penicillium storage rot is normally associated with wounds and historically attributed to P. vulpinum (Bugbee 1975(Bugbee , 1976(Bugbee , 1993Fugate and Campbell 2009 Samson et al 2011;Visagie et al 2014). Penicillium roqueforti Thom and P. paneum have also been isolated from ensiled hard-pressed beet fibers (Boysen et al 2000).…”

“…Recently Penicillium isolates from lesions on sugar beet roots in Idaho differed from previously acknowledged species based on phylogenetic analysis (Strausbaugh et al 2015). This novel pathogenic Penicillium species was established using a polyphasic taxonomic approach suggested by Visagie et al (2014) via molecular data [partial sequences for internal transcribed spacer-5.8S ribosomal DNA (ITS), b-tubulin (BenA), and RNA polymerase II second largest subunit (RPB2)] and macro-and micromorphological characteristics.…”