Publications for:

pest = Erysiphe heraclei
crop = Chervil (Anthriscus cerefolium)

found 2 publications:

2014

First report of powdery mildew caused by Erysiphe heraclei on chervil in Korea
Plant Disease (2014) 98 (3), p. 426
publishers website - pestinfo wiki

2004

First report of powdery mildew caused by Erysiphe heraclei on chervil in California
Plant Disease (2004) 88 (10), p. 1163a
publishers website - pestinfo wiki