Revista de fisiología y patología vegetal

First Report of Aphanomyces Root Rot Caused by Aphanomyces cochlioides on Beta vulgaris in Arizona, USA

Haque ME1,2* Parvin MS3,4

Sugar beet (Beta vulgaris L.) is primarily used for the production of sugar, however, the yield is largely affected by below-ground diseases. In April 2018, sugar beet stecklings demonstrated chlorotic foliage in the seed production area of Arizona (34.0489° N, 111.0937° W). Roots appeared water soaked lesions. The disease incidence was about 2%.  Beet roots were washed to remove soil particle, surface-sterilized in a 10% NaOCl solution for 1 minute, and dipped twice in sterile water. Isolations were done on MBV (metalaxyl-benomyl-vancomycin, 72 h at 25 ± 2°C) selective media