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Description

Bacterial pathogens cause an estimated $60 million in damages every year in the USA. Little information is currently known about the bacterial bulb rot pathogens found in Utah that impact the onions. Surveys of onion fields and packing sheds have been conducted over the past two years to find symptomatic leaves and bulbs. Symptomatic onions were collected and cultured to grow bacterial strains and identified using PCR and DNA sequencing of the partial 16S gene. Individual isolates went through pathogenicity testing using onion scale as well as leaf assay tests. There was a total of 191 isolates from 2019 and 2020 of over 20 different genera. Five isolates caused bulb rots in onions. This is the first survey in the state conducted to identify specific bacterial bulb rot pathogens, and growers will be able to use this information to minimize onion losses to bacterial bulb rot pathogens.

Publication Date

12-9-2021

City

Logan, UT

Keywords

pathogens, bulb rot, onions, bacterial

Disciplines

Geography

Survey of Utah Onions for Bulb Rot Pathogens

Included in

Geography Commons

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