Plant Sciences, Inc., conducted an independent study to test the efficacy of Promax® for inhibiting mycelial growth of 8 fungal strawberry pathogens through in vitro bio-assay. The following 8 fungi and fungal-like pathogens were tested:

Botrytis cinera
Colletotrichum acutatum
Cylindrocarpon destructans
Fusarium oxysporum f. sp. fragariae
Macrophomina phaseolina
Phytophthora ramorum
Rhizoctonia solani
Verticillium dahlia

After 1 week of incubation, all 8 pathogens tested were completely inhibited from mycelial growth in media amended with 2% Promax® (see photos, pages 2 and 3). After 2 weeks, 7 of the 8 pathogens were still 100% inhibited. Verticillium dahlia began to grow a little after 2 weeks; the mean percentage inhibition of V. dahliae was 94% after 2 weeks (Figure 1).

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About the Author

Larry Cooper

Director, Sustainability & Knowledge Management, Huma, Inc. Lifelong learner, master gardener, rescuer of greyhounds, grandpa. Once served detention for placing ecology flag on top of his high school.

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