Publications for:

pest = Erysiphe polygoni
crop = Beet/sugarbeet (Beta vulgaris)

found 2 publications:

2014

First report of Q_OI-insensitive powdery mildew (Erysiphe polygoni) on sugar beet in the United States
Plant Disease (2014) 98 (7), p.1004
publishers website - pestinfo wiki

2011

The perfect stage of powdery mildew (Erysiphe polygoni) of Beta vulgaris found in Michigan
Plant Disease (2011) 95 (4), p. 494
publishers website - pestinfo wiki