June 23, 2017

Krishna Mohan – Idaho State Commentary – Onion ipmPIPE

Onion ipmPIPE 2013 ID State Commentary 12 Jul

Idaho Commentary

 

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

Onion crop development is normal, mostly, Stage 7 (bulb diameter mostly 4-6 cm). Thrips populations increasing; significant thrips feeding injury to the leaves.

 

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

Weather conditions are normal for this time of the year. Few isolated hail incidents.

 

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

Thrips

Survey of the four sentinel (observation) plots: Average number of thrips (larvae + adults) per plant varied between 18 and 56.   

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

Presumptive IYSV symptoms have been observed on a few plants in all of the sentinel plots and in some commercial fields.

 

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

No significant problems have been observed.

 

Fungal Diseases (purple blotch, downy mildew, Botrytis)

No significant problems were observed

 

Bacterial Diseases (Xanthomonas, center rot, soft rots)

No surveys or reports at this time

 

 


Onion Pathologist
S. Krishna Mohan
Professor of Plant Pathology
University of Idaho
Email:kmohan@uidaho.edu