| Autor: |
James F. Stewart, Brian J. Groulx, Gregory M. Clark, Lee A. Hubbell |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
American Society of Sugarbeet Technologist. |
| DOI: |
10.5274/assbt.2013.41 |
| Popis: |
Rhizoctonia solani root and crown rot is a serious problem in the Michigan Sugar Company growing area. Company Agriculturists would recommend the use of a susceptible variety and no fungicide on only 1.1% of the acres. Only these few acres would be considered to have no Rhizoctonia. Their recommendation for the use of a tolerant variety increased from 50% of the acres for 2011 to 69% for 2013. Their recommendation for the use of a tolerant variety and two Quadris (Azoxystrobin) applications increased from 15% to 36% for the same two year period. There are two reasons for these changes; disease pressure is increasing and there is now one variety being sold that has good production and Rhizoctonia tolerance. We started testing Quadris for Rhizoctonia control in 1999. Trials have confirmed that Quadris is the most effective product to control Rhizoctonia in our growing area. We continue trials to find the most effective foliar application time and the best rate and band width for T-band application at planting. There is tolerance to Rhizoctonia in some varieties available but there is a large difference in tolerance levels. There are a few varieties with a good level of tolerance but most are poor. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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