Safflower: A New Host of Cercospora beticola

Plant Disease
R T LarteyJ W Bergman

Abstract

Safflower is an oilseed crop adapted to the small-grain production areas of the western Great Plains, including the Northern Plains Area (NPA). In the NPA, safflower production is being evaluated for potential rotation with sugar beet. Safflower is susceptible to Cercospora carthami, whereas sugar beet is susceptible to C. beticola C. carthami has not been observed on safflower in the NPA but C. beticola is ubiquitous on sugar beet. Observation of unusual leaf spots on irrigated safflower cv. Centennial at Sidney, MT prompted this investigation of safflower as a potential alternate host of C. beticola. Safflower plants were inoculated with four isolates of C. beticola (C1, C2, Sid1, and Sid2) and incubated in growth chambers; leaf spot symptoms appeared between 3 and 4 weeks later. Polymerase chain reaction (PCR) amplification of extracts from lesion leaf tissue with C. beticola-specific primers produced fragments comparable with amplified fragments from purified cultures of control C. beticola. PCR assay of cultures of single spores from diseased safflower leaf lesions also produced fragments comparable with fragments from C. beticola cultures. Antibody that was raised from isolate C2 also bound to antigens from the single-spo...Continue Reading

Citations

Jan 10, 2019·IMA Fungus·Mounes BakhshiPedro W Crous
Sep 1, 2017·Plant Disease·Sarah J PethybridgeJulie R Kikkert
Jun 27, 2019·Plant Disease·Noel L KnightSarah J Pethybridge
May 13, 2017·Scientific Reports·Niloofar VaghefiSarah J Pethybridge

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