June 23, 2017

Dan Drost – Utah State Commentary – Onion ipmPIPE

Utah Commentary 5-29

 

Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 05/29/13

Plant growth still a bit slow due to cool-moist conditions over last two weeks. Growers report that onions are in the 3-4 leaf stage and many report that early herbicides resulted in more damage to leaves than expected. Cool weather and lack of sun (limited wax formation) responsible for damage.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 05/29/13

The northern Utah weather has been cool during late May with many forecast days. Average temperatures in upper 50’s and low 60’s. Heavy rains (1.5-2.0 inches) and some hail occurred on May 17-19 and again on May 28-29 (0.75-1.25 inches). Soils moisture considered good and growers who were going to begin irrigations have decide to wait.

 

Insect Scouting, Outlook and Management Last Modified: 05/29/13

Thrips

No surveys or reports at this time

Maggots

No surveys or reports at this time

Other

No surveys or reports at this time

 

Disease Scouting, Outlook and Management Last Modified: 05/29/13

Iris yellow spot virus

No surveys or reports at this time

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

No surveys or reports at this time

Fungal Diseases (purple blotch, downy mildew, Botrytis)

No surveys or reports at this time

Bacterial Diseases (Xanthomonas, center rot, soft rots)

No surveys or reports at this time Onion

 

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