Late planting of the 2011 crop presents a different set of challenges from the early planted 2010 crop with much warmer seedbeds.
WEEDS: Soils usually warm up faster with late planting with weed and beet seedlings emerging together. When this occurs weeds compete more vigorously with beets and risk of yield loss is greater. Timing that first herbicide application is more critical than ever.
DISEASES: Increased likelihood of warm soils during germination and emergence increase risk of stand loss and decreased yield from Pythium, Aphanomyces and Rhizoctonia. At plant applications of Quadris and Headline or POST emergence applications of Quadris and Proline will need to be made within 3-4 weeks of emergence.
Table 1: Efficacy of band-applied fungicides applied at the 6 to 8-leaf stage and then inoculated with Rhizoctonia solani for control of crown and root rot and sugarbeet yield and quality compared to two controls (non-inoculated, no fungicide and inoculated, no fungicide). Windels and Brantner, UM NWROC, 2010
|Treatment and Rate (7-inch band)||No. Harv. Root/100 ftz||RCRR (0-7)z||Yield T/Az||Sucrosez||Revenue ($/A)z|
|Rhizoctonia inoculated No fungicide control||73||5.7||9.5||15.6||286||2780||342|
|Quadris @ 14.3 oz.acre||162||1.5||24.5||18.0||338||8295||1184|
|Headline @ 12 oz./acre||147||2.6||23.7||16.6||308||7228||831|
|Proline @ 5.7 fl oz./A||160||1.6||24.7||17.5||327||8064||1115|
Don't neglect using a starter fertilizer. Be sure it contains adequate amounts of phosphorus.
Don't neglect use of the row crop cultivator and rotary hoe when necessary.