June 23, 2017

Onion ipmPIPE Project

onion 2

The ONION ipmPIPE was developed in response to stakeholder demands for a coordinated and comprehensive website where onion farmers and agricultural professionals could obtain: 1) real-time information on the distribution and severity of priority diseases and insect pests in North America; 2) time-sensitive disease risk assessments; 3) information on disease and insect pest management options and 4) links to other important tools on onion production and pest management.   Stakeholders are advised of the status of priority diseases and insect pests through observational maps and national/state commentaries on a public website.  This allows all state commentaries/observations within reach in one website.

Emphasis is on  Onion (green, transplanted, seeded, storage, processed); and other alliums such as garlic & chives benefit from research on pests and diseases.  Priority Diseases and Insect Pests include: Iris yellow spot virus (IYSV); Thrips (emphasis on onion thrips) – as a vector of IYSV and a pest;  Other insects such as onion maggot;  Foliar & storage fungal diseases including Botrytis, Purple Blotch, Downy Mildew, Blue Mold, Black Mold; and Foliar & Storage bacterial diseases including Xanthomonas Leaf Blight, Sour Skin, Slippery Skin, Pantoea, Soft Rots.

A national team of onion experts, growers and industry representatives have created a unique on-line resource that will enhance the production, pest management, storage, and marketing of this vital food product for the consuming public in the United States and internationally.  This multi-year project is funded in part by the USDA’s Specialty Crop Research Initiative established by the 2008 Farm Bill; and has been endorsed by state and national onion organizations throughout all major onion-producing regions of the country.

Brian Nault – NY State Commentary – Onion ipmPIPE


2012 -NY Report – June 4

Onion ipmPIPE website regional report


New York State Report  – June 18, 2012


Onion Crop Growth Stage and Status:

Onions are growing well.  Some transplanted onions have 10 to 11 leaves.  Direct-seeded onion fields range from 2 to 6 leaves.


Weather impacts (temperature, rain, hail, freezing):

Moderate.  Over the past couple of weeks, temperatures have been relatively normal.  Similarly, rainfall has been somewhat normal.


Insect Scouting, Outlook and Management: 

Maggots:  Onion maggot damage is subsiding in most places as we near the end of the first generation – 2 weeks earlier than normal.

Thrips:  Adults can be readily found in transplanted fields, while few adults have been observed in direct-seeded fields.  Some transplanted fields received their first spray last week.


Disease Scouting, Outlook and Management: 

Iris yellow spot virus:  none observed

Soil-borne Diseases (Damping-off, pink root, Fusarium basal rot):  none reported

Fungal Diseases (purple blotch, downy mildew, Botrytis leaf blight):  Botrytis leaf blight (BLB) is common with anywhere from less than one to over 20 lesions per leaf.  Growers have continued using foliar applications of fungicides for BLB control in Upstate NY.



Bacterial Diseases (Xanthomonas, center rot, soft rots):  none

New York State report filed by:

Brian A. Nault, Dept. of Entomology, Cornell University

Email:  ban6@cornell.edu

Phone:  315-787-2354


Comments by others in New York State included in this report:

Christy Hoepting, Cornell Cooperative Extension, Albion, NY

Email:  cah59@cornell.edu


Lindsey du Toit – Washington


WASHINGTON and OREGON Columbia Basin Onion Commentary
Onion Crop Growth Stage and Status Last Modified: 05/17/12
Onion plantings complete in the Columbia Basin of Oregon and Washington States; estimated
20,000 acres planted. Spring-planted onion crops in the south Basin range from cotyledon to 3
true-leaf growth stage. Crops in the north Basin typically are further behind depending on
planting date. Onion seed crops fared well through the relatively mild winter and have bolted
(most at the stage of emerged but unopened umbels).
Weather Impacts (temperature, rain, hail, freezing) Last Modified: 05/17/12
April was the warmest in the past 5 months for the Columbia Basin of central WA/north-central
OR, although a fair amount of rain was received.
Insect Scouting, Outlook and Management Last Modified: 05/17/12
No monitoring yet. Tim Waters observed low numbers of thrips on some volunteer onions, and
anticipates populations may increase early this season because of warmer spring conditions.

No surveys or reports at this time. Tim Waters has observed higher numbers of adult maggot
flies than usual in the south Columbia Basin, but it appears that onion growers’ standard maggot
management practices are effectively mitigating significant impact of the flies.

No surveys or reports at this time.
Disease Scouting, Outlook and Management Last Modified: 05/17/12

Iris yellow spot virus
No surveys or reports at this time
Soil-borne Diseases (damping-off, pink root, Fusarium, Rhizoctonia)
First evidence of patching developing in association with Rhizoctonia infection in bulb crops on
very sandy fields in the south Basin (northcentral OR and southcentral WA), particularly the
earlier planted fields.

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 (submitted on behalf of WA/north-central OR onion participants)
Lindsey du Toit
Associate Professor of Plant Pathology, Washington State University,
Email: dutoit@wsu.edu, 360-848-6140