June 23, 2017

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah Commentary10-5

 

Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 10/05/12

Growers have completed harvests for the year. Field preparation is beginning for 2013.Weather Impacts (temperature, rain, hail, freezing) Last Modified: 10/05/12

Weather conditions over last two weeks above normal. Day temperatures were in 70’s and nights cooling into the 40’s. No rain or severe weather experienced. Several hard freezes occurred over first weekend in October.

 

Insect Scouting, Outlook and Management Last Modified: 09/09/12

Thrips

No information to report.

Maggots

No information to report.

Other

No information to report.

 

Disease Scouting, Outlook and Management Last Modified: 10/05/12

Iris yellow spot virus

No information to report.

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

No information to report.

Fungal Diseases (purple blotch, downy mildew, Botrytis)

No information to report.

Bacterial Diseases (Xanthomonas, center rot, soft rots)

No information to report.Onion Specialist Daniel Drost Professor of Horticulture Utah State University Email: dan.drost@usu.edu

 

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah Commentary9-9

Utah Commentary

 

Onion Crop Growth Stage and Status Last Modified: 09/09/12

Onion growth in growth stage 9 with tops more than 50% down.  Growers have completed water

applications for the year and many are preparing for lifting.  Some growers have seeded fields

lifted but none are harvested yet.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 09/09/12

Weather conditions over last two weeks about normal.  Day temperatures were in low 90’s and

nights cooling into the 60’s. No rain or severe weather experienced.

 

Insect Scouting, Outlook and Management Last Modified: 09/09/12

Thrips

Final thrips samples taken in all sentinel fields. No information to report.

 

Maggots

None reported at this time

 

Other

None reported at this time

 

Disease Scouting, Outlook and Management Last Modified: 09/09/12

Iris yellow spot virus

IYSV incidences found throughout Utah onion production areas.

 

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

Fields continue to show evidence of patchy pink root and basal rot. Tip dieback evident where

PR and BR severe.

 

Fungal Diseases (purple blotch, downy mildew, Botrytis)

Some minor damage from purple blotch noted but quite isolated.

 

Bacterial Diseases (Xanthomonas, center rot, soft rots)

Not observed or reported at this time

 

Onion Specialist

Daniel Drost

Professor of Horticulture

Utah State University

Email: dan.drost@usu.edu

 

Collaborators: Diane Alston, Claudia Nischwitz, Bonnie Bunn and Utah Onion Association

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah Commentary8-25

 

Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 08/25/12

Onion growth with most fields in growth stage 7 with tops beginning to go down. Transplanted onions are fully harvested. Growers have sufficient water to deal with irrigation needs and continue to irrigate to finish the crop. Growers report that seeded crop harvest should begin around the 1st of September. Most are happy with the growth and sizing should be very good.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 08/25/12

Warm temperature conditions were experienced over last two weeks. Day temperatures were near normal during the period with temperatures in low to mid 90’s for much of the period. No severe weather experienced (rain, hail).

Insect Scouting, Outlook and Management Last Modified: 08/25/12

Thrips

Thrips populations continue to decrease in all sentinel fields. Final samples taken.

Maggots

None reported at this time

Other

None reported at this time

Disease Scouting, Outlook and Management Last Modified: 08/25/12

Iris yellow spot virus

IYSV incidences found throughout Utah onion production areas with incidence building.

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

Some fields showing patch pink root and basal rot. Left tips dieback evident where PR and BR severe.

Fungal Diseases (purple blotch, downy mildew, Botrytis)

Some minor damage from purple blotch noted but quite isolated at this time. Left tips dieback evident though not always associated with PB.

Bacterial Diseases (Xanthomonas, center rot, soft rots)

Not observed or reported at this time Onion Specialist Daniel Drost Professor of Horticulture Utah State University Email: dan.drost@usu.edu

 

Mary Hausbeck – Michigan State Commentary – Onion ipmPIPE

onion-flowers

2012_08_24_Michigan_ipmOnion_Report[8]

 

MICHIGAN Commentary

Onion Crop Growth Stage and Status Last Modified: 08/24/12

Bulbs continue to mature with diameters greater than 4 cm. About one third of the scouted fields are topped over, while another third have been harvested from the fields.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 08/24/12

Growing regions received some precipitation in the form of scattered showers and temperatures are continuing to cool down, especially in the evenings. Dew periods that had been absent for much of this hot summer are now commonly occurring.

Insect Scouting, Outlook and Management Last Modified: 08/24/12

Thrips

Remaining thrips populations were low, with less than a 50% incidence of plants with thrips.

Maggots

None found in surveys or reported at this time.

Other

None found in surveys or reported at this time.

Disease Scouting, Outlook and Management Last Modified: 08/24/12

Iris yellow spot virus

Iris yellow spot virus incidence has been confirmed in both northern and southern sites of Michigan. Obvious symptoms caused by the virus have been observed in the southern site of the state. Managing thrips populations which spread the virus may limit the disease.

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

Pink root has been identified in several fields across the state. Above-ground symptoms of pink root are observed as a die-back or a premature senescence of foliage across leaves of all ages.

Fungal Diseases (purple blotch, downy mildew, Botrytis)

Stemphylium leaf blight appears to be dominant in all fields. High incidence is observed in onion fields which experienced hail damage.

Anthracnose, caused by the pathogen Colletotrichum coccodes, was detected and confirmed. It is widespread in the Grant area.

Bacterial Diseases (Xanthomonas, center rot, soft rots)

Onion leaves presenting symptoms of stalk and leaf necrosis, caused by Pantoea agglomerans, appeared to be in higher numbers compared to the previous scouting date. Identification of the bacteria associated with these recent samples is pending. Onion Specialist Mary Hausbeck Professor and Extension Specialist Michigan State University Email:hausbec1@msu.edu

 

Lindsey du Toit – WA OR State Commentary – Onion ipmPIPE

onion_flowers

2012 WA Commentary 8-11-2012

WASHINGTON and OREGON Columbia Basin Onion Commentary

 

Onion Crop Growth Stage and Status Last Modified: 08/11/12

Crops are at stage 7 in Sentinel Plots in the south and north Columbia Basin. The crops look good overall. Undercutting, topping, field curing, and even harvest have begun for some spring-sown crops in the south Basin. Most onion seed crops have been swathed for harvest.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 08/11/12

Late July and the first half of August have been quite warm in the Columbia Basin (highs in the 90’s to 100’s F), typical for this time of year.

Central Washington temperature outlook (2-4 weeks): average to 30% above average*

Central Washington precipitation outlook (2-4 weeks): average (no rain for this region)*

* Courtesy of Planalytics, Inc. (http://apps.planalytics.com)

 

Insect Scouting, Outlook and Management Last Modified: 08/11/12

Thrips: Thrips numbers in Sentinel Plots averaged 7-12/plant in the south Columbia Basin, and 16-17/plant in the north Basin, a decline since the last regional report.

 

Maggots: No maggot damage to report this time of year.

 

Other: 4% of plants in one south Columbia Basin Sentinel Plot had leafminer injury, and 2% of the plants in that Sentinel Plot had green peach aphids.

 

Disease Scouting, Outlook and Management Last Modified: 08/11/12

Iris yellow spot virus: No symptoms in the Sentinel Plots. Not much to report from commercial crops either, although a few IYSV samples have been received at the Oregon State University Hermiston AREC.

 

Soil-borne Diseases (damping-off, pink root, Fusarium, Rhizoctonia): 2% of the plants in one Sentinel Plot in the south Columbia Basin are infected with pink root.

 

Fungal Diseases (purple blotch, downy mildew, Botrytis): No further incidences since the last regional report.

 

Bacterial Diseases (Xanthomonas, center rot, soft rots): Symptoms of bacterial soft rot were observed in several overhead irrigated bulb crops in the Columbia Basin at a wide range of incidences, including at 1% in one of the Sentinel Plots in the south Basin. Frequent rain events and occasional hail storms in mid-July may have exacerbated bacterial infections.

 


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

 

Chris Cramer – New Mexico State Commentary – Onion ipmPIPE

yellowonion

2012NewMexicoCommentary (07-27-12)

New Mexico Commentary 

 

Onion Crop Growth Stage and Status Last Modified: 07/27/12

The harvest of the spring-sown crop is proceeding well. Yields and quality should be good as

environmental conditions have been ideal. Some delays in harvest may occur due to wet fields.

Market prices have increased due to reduced supply. An additional sentinel plot has been

harvested with only one remaining. The last remaining sentinel plot will be harvested before the

next sampling date. Depending upon the location, the harvest of the spring-sown crop should

conclude in the next 2-3 weeks. This is the last report.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 07/27/12

Summer monsoon conditions continue with decreased temperatures and sporadic rainfall. This

rainfall may have resulted in some wet fields and a delay in harvest depending upon the location.

Since the start of the month, rainfall totals have averaged 1-3” depending upon location.

 

Temperature Outlook* [2 – 4 weeks]: Normal

Precipitation Outlook* [2 – 4 weeks]: Normal

*Courtesy of Planalytics, Inc. 

 

Insect Scouting, Outlook and Management Last Modified: 07/27/12

Thrips

Thrips numbers (adult and juvenile) range from 0 to 79 per plant with an average of 2 per plant.

 

Other

No surveys or reports at this time

 

Disease Scouting, Outlook and Management Last Modified: 07/27/12

Iris yellow spot virus

No 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

 

State Contact for Project

Chris Cramer

Professor of Horticulture

New Mexico State University

Email:cscramer@nmsu.edu

Collaborators: Mark Uchanski, Mike Petersen

 

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

 

 

Utah Commentary

 

Onion Crop Growth Stage and Status Last Modified: 07/27/12

Onion bulbing dominates growth in most fields with crop in growth stages 6 or 7.  Growers have

sufficient water to deal with irrigation needs and no water shortages noted.  Growers report few

problems but indicate that they are regularly applying insecticides for thrips control.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 07/27/12

Tropical moisture flow out of SW USA dominated weather conditions in Utah over last two

weeks. Rain showers around in northern Utah occurred but very localized and less than ½ inch

reported.  Day temperatures were near normal with temperatures in low 90’s.

 

Insect Scouting, Outlook and Management Last Modified: 07/27/12

Thrips

Fourth round of field surveys completed this week.  Thrips populations in most fields are stable

or decreasing compared to earlier reports.

 

Maggots

None reported at this time

 

Other

None reported at this time

 

Disease Scouting, Outlook and Management Last Modified: 07/27/12

Iris yellow spot virus

IYSV incidences in Utah onion fields are very low with only one confirmed field with disease

and infection level very low.

 

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

Not observed or reported at this time

 

Fungal Diseases (purple blotch, downy mildew, Botrytis)

Some minor damage from purple blotch noted but incidence quite isolated at this time

 

Bacterial Diseases (Xanthomonas, center rot, soft rots)

Not observed or reported at this time

 

 

Onion Specialist

Daniel Drost

Professor of Horticulture

Utah State University

Email: dan.drost@usu.edu

 

Collaborators: Diane Alston, Claudia Nischwitz, Bonnie Bunn and Utah Onion Association

Chris Cramer – New Mexico State Commentary – Onion ipmPIPE

yellowonion

2012NewMexicoCommentary (07-13-12)

New Mexico Commentary

Onion Crop Growth Stage and Status Last Modified: 07/13/12
The harvest of the spring-sown crop has begun. Yields and quality should be good as
environmental conditions have been ideal. Some delays in harvest may occur due to wet fields.
Market prices have increased due to reduced supply. Two sentinel plots have been harvested and
it is anticipated that the remaining two plots will be harvested by the next report.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 07/13/12
Summer monsoon conditions have arrived since the last report. Daily maximum temperatures
have decreased since the last report. Morning and afternoon rain showers have occurred in most
production areas. This rainfall may have resulted in some wet fields and a delay in harvest
depending upon the location. Since the start of the month, rainfall totals have averaged 1-2”
depending upon location.
Temperature Outlook* [2 – 4 weeks]: Normal
Precipitation Outlook* [2 – 4 weeks]: Normal
*Courtesy of Planalytics, Inc.

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

Thrips
Thrips numbers (adult and juvenile) range from 0 to 48 per plant with an average of 4-6
depending upon sentinel plot. Growers have done an excellent job at controlling thrips
populations.

Other
No surveys or reports at this time

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

Iris yellow spot virus
No 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

State Contact for Project
Chris Cramer
Professor of New Mexico State University
New Mexico State University
Email:cscramer@nmsu.edu
Collaborators: Mark Uchanski, Mike Petersen

Howard Schwartz – Colorado State Commentary – Onion ipmPIPE

onion 2

CO Commentary (07-13-12)

COLORADO Commentary
Onion Crop Growth Stage and Status Last Modified: 07/13/12
Thrips pressure continues to build in Eastern, Southern and Western Regions of the state. Pink Root confirmed in northern and southern Colorado, along with a trace of Phytoplasma in transplants. Risk Models show that Thrips and IYSV are at High Risk, while foliar bacterial and fungal threats remain at Low to Medium Risk in most regions.
Weather Impacts (temperature, rain, hail, freezing) Last Modified: 07/13/12
The northern region received 1 – 3 inches of rain last week, and other regions of the state received less than 0.25 inches or no rain. Temperatures have averaged in the upper 80 to low 90s during the day, and upper 50s to mid 60s in the evening.
Temperature Outlook* [2 – 4 weeks]: Above Normal
Precipitation Outlook* [2 – 4 weeks]: Below Normal
*Courtesy of Planalytics, Inc.

Insect Scouting, Outlook and Management Last Modified: 07/13/12
Thrips – Surveys detected up to 60 (larvae + adult) thrips in commercial fields on transplants or seeded onions.
Maggots – No surveys or reports at this time
Other – No new reports at this time.

Disease Scouting, Outlook and Management Last Modified: 07/13/12
Iris yellow spot virus – IYSV detected in surveys of transplanted and seeded onions (trace to nearly 40% ) sampled in northern and southern regions.

Soil-borne Diseases (Damping Off, Pink Root, Fusarium) – Pink Root was confirmed in 10 % of seeded onions sampled in northern and southern Colorado recently. Fusarium basal rot present at less than 1% in many transplanted fields in the northern region.

Fungal Diseases (purple blotch, downy mildew, Botrytis) – No surveys or reports at this time

Bacterial Diseases (Xanthomonas, center rot, soft rots) – Samples (< 1%) from southern and northern transplants infected by a Phytoplasma (leafhopper transmitted) earlier this season during warm dry spring conditions. Samples sent to AgDIA for confirmation – results confirmed.

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

Lindsey du Toit – Washington State Commentary – Onion ipmPIPE

onion_flowers

2012 WA Commentary 7-13-2012

 

WASHINGTON and OREGON Columbia Basin Onion Commentary

 

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

Overwintered onion crops in the south Columbia Basin are still being harvested. Spring planted onion bulb crops look good overall. Crops are at stages 5-7 in the south Columbia Basin, and 5-6 in the north Columbia Basin in the Sentinel Plots. The crop looks good overall. If thrips numbers continue to go down in the south Basin, that will be good news, but we may not be out of the woods yet for thrips problems.

 

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

June in central WA turned out to be even cooler than in 2011, surprisingly, with unusually high precipitation and even hail. Early July turned hot and dry.

Central Washington temperature outlook (2-4 weeks): normal to 30% above average*

Central Washington precipitation outlook (2-4 weeks): normal*

* Courtesy of Planalytics, Inc. (http://apps.planalytics.com)

 

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

Thrips

Thrips numbers have actually gone down a bit in parts of central WA. Onion plants may be sending more resources to the bulb, and leaf growth is slowed, which seems to naturally decrease or reduce thrips fecundity.

Thrips numbers in the north Columbia Basin are either similar or greater than two weeks ago (8 to 40 thrips/plant).

Maggots

No maggot damage to report this time of year.

 

Other

Some leaf miners and a few aphids were detected in one of the Sentinel Plots in the south Basin.

 

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

Iris yellow spot virus

Nothing significant to report. No symptoms in Sentinel Plots.

Soil-borne Diseases (damping-off, pink root, Fusarium, Rhizoctonia)

Some severe patches of stunted plants observed from Rhizoctonia infection in bulb crops on sandy fields in the north Basin, planted in rotation with overwintering cereal cover crops that were killed with herbicides at the time of planting onion seed. No patches in Sentinel Plots.

 

Fungal Diseases (purple blotch, downy mildew, Botrytis)

Additional pink root samples observed in some fields in the north Columbia Basin, particularly some fields rotated regularly with sweet corn and onion.

 

Bacterial Diseases (Xanthomonas, center rot, soft rots)

Soft rot observed at a low incidence in a bulb crop under center pivot irrigation (5/1,000 plants examined), but not in the Sentinel Plots.

 


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