June 23, 2017

Dan Drost – Utah State Commentary – Onion ipmPIPE

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Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 06/28/13

Plant growth considered normal with plants in the 7-8 leaf stage. Growers happy with growth and many are beginning to apply thrips sprays as pest numbers increase. Growers busy irrigating (no water shortages noted) and some fields have had hand weeding crews go through them to clean up problem areas.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 06/28/13

The northern Utah weather has had a hot late June with average temperatures in low to upper 90’s (record setting heat). Temperatures are about 10 degrees above average. No rain reported in last two weeks and no expected for rest of month. Soils moisture considered good as growers continue with irrigation. Projected hot dry summer and most irrigation companies indicate that water shortages are likely

 

Insect Scouting, Outlook and Management Last Modified: 06/28/13

Thrips

Field surveys on-going. Thrips populations beginning to increase in most fields with counts of ranging from 1-5 adult per plant (average 1.5/plant) and 2-30 larvae per plant (average 13/plant). Growers report they are beginning to spray to control thrips.

Maggots

None reported at this time

Other

None reported at this time

 

Disease Scouting, Outlook and Management Last Modified: 06/28/13

Iris yellow spot virus

None reported at this time

Soil-borne Diseases (Damping Off, Pink Root, Fusarium)

None reported at this time

Fungal Diseases (purple blotch, downy mildew, Botrytis)

None reported at this time

Bacterial Diseases (Xanthomonas, center rot, soft rots)

None reported at this time

Onion Specialist Daniel Drost Professor of Horticulture Utah State University Email: dan.drost@usu.edu