Oak Mildew

Oak Mildew

Observation - Oak Mildew - UK and Ireland. Description: White mildew on the leaves of baby oak trees. Tiny brown spots scraped into a drop of Potassium Hydroxide and examined under the microscope to reveal the chasmothecia with their appendages branching dichotomously at the tips. Ascospores were oval and meas

White mildew on the leaves of baby oak trees. Tiny brown spots scraped into a drop of Potassium Hydroxide and examined under the microscope to reveal the chasmothecia with their appendages branching dichotomously at the tips. Ascospores were oval and measured 17.5-21 x 8.5-10.5 microns (based on 15 spores).