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United States Department of Agriculture

Agricultural Research Service

Title: Cercospora Leaf Spot Research and Breeding for Cercospora/curly Top Resistance

Authors
item Panella, Leonard
item Campbell, Larry
item Smith, Garry

Submitted to: Sugarbeet Research and Extension Reports
Publication Type: Proceedings
Publication Acceptance Date: November 1, 1996
Publication Date: N/A

Interpretive Summary: In many areas where Cercospora leaf spot is a problem, the curly top virus also causes significant losses. Additionally, there are some growing areas in which combined resistance to Cercospora leaf spot, Rhizomania, curly top, and Rhizoctonia root rot are desirable. Germplasm is needed with combined resistance to these diseases, along with good combining ability for yield components.

Technical Abstract: Increased resistance to Cercospora continues to be an extremely important goal. If the level of resistance available in most Cercospora- resistant experimental lines were present in commercial hybrids (along with good sugar and seed yield), the need for fungicides would be greatly reduced. That continued improvement in genetic resistance to this serious pathogen is still needed is evident by the occurrence of Cercospora strains that are resistant to our most potent fungicides. Additionally, some fungicides may be removed from the market because of their perceived or real threat to the environment. In many areas where Cercospora leaf spot is a problem, the curly top virus also causes significant losses. Additionally, there are some growing areas in which combined resistance to Cercospora leaf spot, Rhizomania, curly top, and Rhizoctonia root rot are desirable. Germplasm is needed with combined resistance to these diseases, along with good combining ability for yield components.

Last Modified: 4/17/2014
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