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United States Department of Agriculture

Agricultural Research Service

Research Project: SUCROSE ACCUMULATION AND RETENTION IN SUGARBEETS

Location: Sugarbeet and Potato Research

Title: Effect of pyraclostrobin on postharvest storage and quality of sugarbeet harvested before and after a frost

Authors
item Campbell, Larry
item Fugate, Karen
item Smith, Larry -

Submitted to: Journal of Sugar Beet Research
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: March 8, 2012
Publication Date: May 5, 2012
Citation: Campbell, L.G., Fugate, K.K., Smith, L.J. 2012. Effect of pyraclostrobin on postharvest storage and quality of sugarbeet harvested before and after a frost. Journal of Sugar Beet Research. 49:1-25.

Interpretive Summary: In a number of diverse crops, pyraclostrobin and other strobilurin fungicides have been reported to have beneficial effects on productivity that cannot be attributed to disease control. Enhanced late-season frost tolerance is one such effect that has been observed for sugarbeet after a late season foliar pyraclostrobin application. This phenomenon has been reported in some, but not all, sugarbeet trials, and may potentially affect root storage properties, especially when roots are harvested after a frost. Research was conducted to determine the effect of late season pyraclostrobin application on storage properties of roots harvested before and after a frost. The effects of pyraclostrobin on postharvest respiration rate, invert sugar and raffinose concentration were variable across environments and time in storage, and there were no apparent relationships between the storage properties measured. However, foliar applied pyraclostrobin resulted in a small (7.4 lbs. ton-1), but significant increase in average extractable sucrose concentration, compared to no pyraclostrobin control treatments. This increase was observed in roots harvested before and after a damaging frost at harvest and after storage for 90 days.

Technical Abstract: Pyraclostrobin and other strobilurin fungicides have been reported to have beneficial effects on productivity that cannot be attributed to disease control. Enhanced late-season frost tolerance is one such effect that has been observed for sugarbeet (Beta vulgaris L.) after a late season foliar pyraclostrobin application. This phenomenon has been reported in some, but not all, sugarbeet trials, and may potentially affect root storage properties, especially when roots are harvested after a frost. Research was conducted to determine the effect of late season pyraclostrobin application on storage properties of roots harvested before and after a frost. The effects of pyraclostrobin on postharvest respiration rate, invert sugar and raffinose concentration were variable across environments and time in storage, and there were no apparent relationships between the storage properties measured. However, foliar applied pyraclostrobin resulted in a small (3.7 kg Mg-1), but significant increase in average extractable sucrose concentration, compared to no pyraclostrobin control treatments. This increase was observed in roots harvested before and after a damaging frost at harvest and after storage for 90 days.

Last Modified: 7/28/2014
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