Laboratory and Greenhouse Techniques for Evaluating Selected Fungicides Against Cristulariella moricola on Pecan Leaves. A. J. Latham, Department of Plant Pathology, Alabama Agricultural Experiment Station, Auburn University 36849. Plant Dis. 71:1010-1014. Accepted for publication 27 March 1987. Copyright 1987 The American Phytopathological Society. DOI: 10.1094/PD-71-1010.

Conidia of C. moricola were produced only on autoclaved pecan or holly leaves but not on 19 semisynthetic or plant extract media. Phialoconidia developed on media supplemented with yeast extract except on cornmeal and lima bean agar. Light was an essential factor for conidiation. Czapek-Dox + yeast extract agar supported maximal growth of sclerotia and thus served as a diagnostic medium for isolating C. moricola from infected leaves. Propiconazole protected mature pecan leaves in the greenhouse for 51 days. It was also effective in stopping the growth of C. moricola in established lesions, thus effecting a cure of zonate leaf spot of pecan.