Antifungal Activity of Plant-Derived Essential Oils on Pathogens of Pulse Crops

• DOI: 10.1094/pdis-06-20-1401-re
• Publication Date: 2020-09-17T14:44:48Z
• Authors: Lipi Parikh; Bright O. Agindotan; Mary E. Burrows
• Keywords: Sclerotinia Sclerotiorum; Spore germination

Pulse crops such as chickpeas, lentils, and dry peas are grown widely for human animal consumption. Major yield- quality-limiting constraints include diseases caused by fungi oomycetes. The environmental health concerns of synthetic fungicides used disease management, emergence fungicide-resistant pathogens, demand organic pulse crop products necessitate the search effective alternatives. Safe environmentally friendly plant-derived essential oils (EOs) have been reported against some pathogenic fungi. Growth on EO-amended growth medium an inverted Petri plate assay were to determine effects 38 their volatiles mycelial spore germination important oomycetes: Aphanomyces euteiches, Botrytis cinerea, Colletotrichum lentis, Didymella pisi, D. rabiei, Fusarium avenaceum, Stemphylium beticola, Sclerotinia sclerotiorum, Pythium sylvaticum. Palmarosa, oregano, clove, cinnamon, lemongrass, citronella, thyme incorporated in media inhibited all pathogens 100% at 1:1,000 1:4,000 dilution. In addition, oil (1:500 dilution) showed complete inhibition conidial (0% germination) F. avenaceum pisi. All seven EO 50 except B. cinerea S. sclerotiorum. fungistatic, fungicidal, or both varied EO. EOs show potential management major conventional production systems.