Design, Construction, and Evaluation of Equipment for Nighttime Applications of UV-C for Management of Strawberry Powdery Mildew in Florida and California

Paulo P. Mello, Rodrigo B. Onofre, Mark Rea, Andrew Bierman, David M. Gadoury, Kelly Ivors, Miranda Ganci, Jenny C. Broome, Natalia A. Peres

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We designed and constructed two tractor-drawn ultraviolet-C (UV-C) lamp arrays housed in hemicylindrical hulls adapted to two widths of raised bed planting systems for strawberry. Onboard UV dosimeters were fitted to the arrays to monitor UV-C output in field studies to suppress strawberry powdery mildew. Nighttime applications of UV-C were evaluated in replicated-plot field plantings in Florida and in California. Suppression of powdery mildew by nighttime applications of UV-C at 200 J m−2 was equivalent to that provided by weekly fungicide applications in California and superior to that provided by fungicide treatments in Florida. Costs of construction and operation of the UV-C apparatus were estimated to allow comparisons to conventional fungicide-based suppression of disease. UV-C applications had no negative effects on yield nor any visual phytotoxic effect on plants or fruit throughout the season.

Original languageEnglish
Pages (from-to)321-327
Number of pages7
JournalPlant Health Progress
Volume23
Issue number3
DOIs
StatePublished - 2022

Keywords

  • Podosphaera aphanis
  • Strawberry
  • Strawberry powdery mildew
  • Uv-c

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