June 24, 2017

Howard Schwartz – CO State Commentary – Onion ipmPIPE

CO Commentary (07-12-13)

 

COLORADO Commentary

Onion Crop Growth Stage and Status Last Modified: 07/12/13

Transplanted onions are bulbing and seeded onions range from pre-bulbing to early bulbing depending on location.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 07/12/13

No reports of any storm damage occurring in onion regions.

Temperature Outlook* [2 – 4 weeks]: Average to Above Average

Precipitation Outlook* [2 – 4 weeks]: Average to Above Average

*Courtesy of Planalytics, Inc.

 

Insect Scouting, Outlook and Management Last Modified: 07/12/13

Thrips

Thrips levels are past established thresholds and growers are continuing to use various insecticide control measures. Thrips numbers exceed 25 per plant in most production regions of Colorado.

Maggots

No surveys or reports at this time

Other

No surveys or reports at this time

 

Disease Scouting, Outlook and Management Last Modified: 07/12/13

Iris yellow spot virus

A few positive reports with ELISA or PCR testing, but no serious outbreaks reported yet.

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

A low incidence of pink root and Fusarium noted in some fields in northern Colorado.

Fungal Diseases (purple blotch, downy mildew, Botrytis)

No reports at this time

Bacterial Diseases (Xanthomonas, center rot, soft rots)

No reports at this time 

State Contact for Project Howard Schwartz Professor of Plant Pathology Colorado State University Email:howard.schwartz@colostate.edu

Collaborators: Whitney Cranshaw, Ned Tisserat, Stephanie Szostek, Janet Hardin,

Mike Bartolo, Thad Gourd, Bob Hammon, Colorado Onion Association