June 23, 2017

Chris Cramer – NM State Commentary – Onion ipmPIPE

yellowonion

2013NewMexicoCommentary (07-12-13)

New Mexico Commentary

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

The spring sown-crop onion crop is now at growth stage 7-10 with harvest drawing to a close in

the coming weeks. Bulb yields and quality have been good as environmental conditions have

been ideal, albeit warm, necessitating frequent irrigations (every 5-7 days until dry down for

harvest).

 

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

Temperatures have been in the high 90s with the onset of the monsoon season. Temperatures

may decrease in the coming weeks with increased cloud cover. There has been very little

accumulated rainfall for any given location, although some locations have received trace

amounts. The monsoon season has begun, increasing the chances of rain as harvest finishes up.

Temperature Outlook* [2 – 4 weeks]: Normal

Precipitation Outlook* [2 – 4 weeks]: Below Normal

*Courtesy of Planalytics, Inc.

 

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

Thrips

Thrips numbers (adult and juvenile) averaged 1 to 18 per plant in the remaining three

unharvested sentinel plots. Thrips numbers have increased as harvest approaches.

Other

Some minor leaf miner damage has been reported in some sentinel plots. In addition, some

storm (hail and wind) damage has also been reported.

 

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

Iris yellow spot virus

No reports at this time

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

Pink root has become more apparent in some sentinel plots as harvest draws nearer. However,

losses appear to be small.

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

*Starting June 01, 2013 Mark Uchanski will serve as the state contact (uchanski@nmsu.edu).

Howard Schwartz – CO State Commentary – Onion ipmPIPE

onion 2

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

 

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah Commentary 7-11

 

Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 07/11/13

Plant growth considered normal with onions in growth stages 4-5. Plants are beginning to show bulb sizing in most field. Growers are regularly applying thrips sprays as pest numbers increase. Growers busy irrigating (no water shortages reported but late summer supplies anticipated to be in short supply) and some fields have had hand weeding crews go through them to clean up problem areas. Minor leaf damage occurred in localized areas due to hail.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 07/11/13

The Utah weather has had been very hot in early July; temperatures upper 90’s to low 100’s (record setting heat continues). Temperatures are about 10 degrees above average. Several days of rain were experienced in early July with strong winds and some localized hail (July 5-6). Soils moisture considered good as growers continue with irrigation. Continued hot dry conditions expected with periodic returns of monsoonal weather patterns (strong winds, heavy rain and possible hail).

 

Insect Scouting, Outlook and Management Last Modified: 07/11/13

Thrips

Field surveys on-going. Thrips populations steadily increasing with counts of ranging from 2-12 adult per plant (average 3.5/plant) and 3-35 larvae per plant (average 20/plant). Growers are initiating their personal spray schedules to control thrips.

Maggots

None reported at this time

Other

None reported at this time

 

Disease Scouting, Outlook and Management Last Modified: 07/11/13

Iris yellow spot virus

None reported at this time

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

None reported at this time

Fungal Diseases (purple blotch, downy mildew, Botrytis)

None reported at this time

Bacterial Diseases (Xanthomonas, center rot, soft rots)

None reported at this time 

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

 

Lindsey du Toit – WA State Commentary – Onion ipmPIPE

onion_flowers

2013 WA – Onion ipmPIPE Commentary 7-10-2013

COLUMBIA BASIN OF NORTHCENTRAL OREGON AND CENTRAL WASHINGTON Commentary 7/10/2013

 

Onion Crop Growth Stage and Status Last Modified: 07/10/13

Onion crop growth continues to progress normally across the Columbia Basin. Crops in the north Basin are at the 7-9 leaf stage of growth (growth stage 4 to 5), and in the south Basin most crops are at the 8-12 leaf (growth stage 5) stage or the 2.5-4.0 cm diameter bulb stage (growth stage 6).

 

Seed crops of Allium fistulosum (bunching onion) are mostly done pollinating. A. cepa and CFC (‘cepa fistulosum cross’) seed crops are in mid- to late- full bloom, respectively.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 07/10/13

A sudden, very hot period from late June through the first week of July, following an extended rainy, cool period may have created stress for some bulb and seed crops. There is concern about the A. cepa and CFC seed crops, in particular, as the high temperatures (up to 108oF) can have a very negative effect on pollination by reducing nectar flow and honey bee activity. Most A. fistulosum seed crops may have escaped the heat in terms of pollination. The heat wave is also likely to affect thrips numbers.

 

Temperature Outlook* [next 2 – 4 weeks]:    30-40% above average

Precipitation Outlook* [next 2 – 4 weeks]:    30-40% below average

*Courtesy of Planalytics, Inc.

 

Insect Scouting, Outlook and Management Last Modified: 07/10/13

Thrips

Thrips populations have increased rapidly in onion bulb crops with the onset of very warm conditions. 100% of plants were infested in Sentinel Plots in the south Columbia Basin, at 3 to 50 thrips/plant; and 100% of plants infested with thrips in Sentinel Plots in the north Columbia Basin, at 4 to 26 thrips/plant.

 

Maggots

No maggot problems reported at this time.

Other

Leafminer observed on 6% of the plants in one Sentinel Plot in the south Columbia Basin.

 

Disease Scouting, Outlook and Management Last Modified: 07/10/13

Iris yellow spot virus

No reports at this time from the NOVL or growers.

 

Soilborne Diseases (Damping-off, pink root, Fusarium basal rot, etc.)

Pink root observed on 2 to 4% of the plants in Sentinel Plots in the south Columbia Basin. Rhizoctonia stunted patches becoming less apparent as the canopy closes on most crops.

 

Fungal Foliar Diseases (purple blotch, downy mildew, Botrytis)

No surveys or reports at this time.

 

Bacterial Diseases (Xanthomonas, center rot, soft rots)

No further samples from the NOBL or comments from growers at this time.

 

State Contact for Project
Lindsey du Toit
Professor of Plant Pathology

Washington State University
Email: dutoit@wsu.edu

 

Collaborators: Tim Waters, Carrie Wohleb, Jordan Eggers, Hanu Pappu, Brenda Schroeder,

Bill Dean

 

Howard Schwartz – CO State Commentary – Onion ipmPIPE

onion 2

CO%20Commentary%20%2806-28-13%29

 

COLORADO Commentary

Onion Crop Growth Stage and Status Last Modified: 06/28/13

Overall, onion acres are down considerably in SE Colorado (into western Kansas) due to the persistent drought conditions. In general, transplanted onions are nearing the bulbing phase and seeded onions are about 2 – 4weeks from bulbing depending on location.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 06/28/13

No reports of any storm damage occurring in onion regions.

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

Precipitation Outlook* [2 – 4 weeks]: Average

*Courtesy of Planalytics, Inc.

 

Insect Scouting, Outlook and Management Last Modified: 06/28/13

Thrips

Thrips levels are starting to increase past established thresholds and growers are starting control measures (primarily Movento). Thrips numbers range from 5 – 26 per plant in northern and 20 per plant in southern Colorado.

Maggots

No surveys or reports at this time

Other

No surveys or reports at this time

 

Disease Scouting, Outlook and Management Last Modified: 06/28/13

Iris yellow spot virus

No reports at this time

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

No reports at this time

Fungal Diseases (purple blotch, downy mildew, Botrytis)

No reports at this time

Bacterial Diseases (Xanthomonas, center rot, soft rots)

No reports at this timeState 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

 

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah%20Commentary%206-28

 

Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 06/28/13

Plant growth considered normal with plants in the 7-8 leaf stage. Growers happy with growth and many are beginning to apply thrips sprays as pest numbers increase. Growers busy irrigating (no water shortages noted) and some fields have had hand weeding crews go through them to clean up problem areas.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 06/28/13

The northern Utah weather has had a hot late June with average temperatures in low to upper 90’s (record setting heat). Temperatures are about 10 degrees above average. No rain reported in last two weeks and no expected for rest of month. Soils moisture considered good as growers continue with irrigation. Projected hot dry summer and most irrigation companies indicate that water shortages are likely

 

Insect Scouting, Outlook and Management Last Modified: 06/28/13

Thrips

Field surveys on-going. Thrips populations beginning to increase in most fields with counts of ranging from 1-5 adult per plant (average 1.5/plant) and 2-30 larvae per plant (average 13/plant). Growers report they are beginning to spray to control thrips.

Maggots

None reported at this time

Other

None reported at this time

 

Disease Scouting, Outlook and Management Last Modified: 06/28/13

Iris yellow spot virus

None reported at this time

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

None reported at this time

Fungal Diseases (purple blotch, downy mildew, Botrytis)

None reported at this time

Bacterial Diseases (Xanthomonas, center rot, soft rots)

None reported at this time

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

 

Chris Cramer – NM State Commentary – Onion ipmPIPE

yellowonion

2013NewMexicoCommentary%20%2806-26-13%29

New Mexico Commentary

Onion Crop Growth Stage and Status Last Modified: 06/26/13

The autumn-sown crop is mostly harvested and the spring sown-crop is at growth stage 6-9 with

harvest continuing over the coming weeks. Bulb yields and quality should be good as

environmental conditions have been ideal, albeit warm, necessitating frequent irrigations (every

5-7 days until dry down for harvest).

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 06/26/13

Temperatures have increased to the low 100s, but this is normal for this time of year. The

temperatures have been ideal for onion growth. There has been very little rainfall, although some

locations have received trace amounts. The “monsoon” season typically begins in early July, but

significant rainfall is not expected in the next two weeks.

Temperature Outlook* [2 – 4 weeks]: Normal

Precipitation Outlook* [2 – 4 weeks]: Below Normal

*Courtesy of Planalytics, Inc.

 

Insect Scouting, Outlook and Management Last Modified: 06/26/13

Thrips

Thrips numbers (adult and juvenile) averaged 0 to 10 per plant depending upon the sentinel plot.

There is a wide diversity of thrips pressure in the sentinel plots sampled with some quite low,

some with moderate pressure, and others with “spotty” pressure likely due to proximity to the

edge of the field and crops in adjacent fields.

Other

No surveys or reports at this time

 

Disease Scouting, Outlook and Management Last Modified: 06/07/13

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

*Starting June 01, 2013 Mark Uchanski will serve as the state contact (uchanski@nmsu.edu).

Lindsey du Toit – WA State Commentary – Onion ipmPIPE

onion_flowers

2013 WA – Onion ipmPIPE Commentary 6-26-2103

COLUMBIA BASIN OF NORTHCENTRAL OREGON AND CENTRAL WASHINGTON Commentary 6/26/2013

 

Onion Crop Growth Stage and Status Last Modified: 06/26/13

Onion crop growth continues to progress as ‘normal’ for most crops across the Columbia Basin. Crops in the north Basin are at the 5-7 true-leaf stage of growth, and in the south Basin most crops are at the 6-9 true-leaf growth stage.

 

Onion seed crops of Allium fistulosum (bunching onion) are nearing the end of pollination. A. cepa seed crops are in full bloom with bee hives active in all the crops.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 06/26/13

Warm, sunny weather typical of the Columbia Basin of central Washington and northcentral Oregon was replaced with unusually wet conditions for an extended period of more than a week, despite the earlier forecast of normal precipitation or 40% below normal. The forecast for very warm/hot conditions over the next week or two may result in some stress to the crops after this cool, moist period. Precipitation over the past week may result in some foliar diseases in the few weeks that are seldom of concern in the Columbia Basin.

 

Temperature Outlook* [next 2 – 4 weeks]:    60-70% above average

Precipitation Outlook* [next 2 – 4 weeks]:    30% below average

*Courtesy of Planalytics, Inc.

 

Insect Scouting, Outlook and Management Last Modified: 06/26/13

Thrips

Thrips populations have increased rapidly in onion bulb crops, with 100% of the plants infested in Sentinel Plots in the south Columbia Basin, at a range of 2 to 20 thrips/plants, and 88 to 92% of plants infested with thrips in Sentinel Plots in the north Columbia Basin, at 6 to 12 thrips/plant.

 

Maggots

No further maggot problems reported.

Other

Leafminer observed on 5% of the plants in one of the Sentinel Plots in the south Columbia Basin.

 

Disease Scouting, Outlook and Management Last Modified: 06/26/13

Iris yellow spot virus

No reports at this time.

 

Soilborne Diseases (Damping-off, pink root, Fusarium basal rot, etc.)

Pink root observed on 10 to 20% of the plants examined in one of the Sentinel Plots in the south Columbia Basin. Rhizoctonia stunted patches are very evident now as the canopy begins to close in most crops.

 

Fungal Foliar Diseases (purple blotch, downy mildew, Botrytis)

No surveys or reports at this time.

 

Bacterial Diseases (Xanthomonas, center rot, soft rots)

No further samples or comments received from growers at this time.

 

State Contact for Project
Lindsey du Toit
Professor of Plant Pathology

Washington State University
Email: dutoit@wsu.edu

 

Collaborators: Jordan Eggers, Hanu Pappu, Brenda Schroeder, Tim Waters, Carrie Wohleb, Bill Dean

 

Mary Hausbeck – Michigan State Commentary – Onion ipmPIPE

onion-flowers

2013_06_25_Michigan_ipmOnion_Report

 

MICHIGAN Commentary

Onion Crop Growth Stage and Status Last Modified: 06/25/13

Onions have been developing gradually. However, leaf curling at the tip and twisting near the stem base caused by herbicide application have been observed in many fields.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 06/25/13

In the past two weeks, warm weather has continued. Temperatures across the monitored sites ranged from a low of 43 to 67F with highs ranging from 59 to 88F. Total rainfall amounts ranged from 2.4 to 4.0 inches.

 

Insect Scouting, Outlook and Management Last Modified: 06/25/13

Thrips

Thrips populations have started to increase but are generally low in number. Thrips activity was detected on plants of all growth stages from 3 to 7 leaves.

Maggots

Damage caused by onion maggot has been observed in some fields on direct-seeded onions. Wilting of the foliage was observed along with feeding on the roots. The maggots had burrowed into the basal plate and the creamy-white larva were detected on the roots and basal plate.

Other

None found in surveys or reported at this time

 

Disease Scouting, Outlook and Management Last Modified: 06/25/13

Iris yellow spot virus

Onions with suspected IYSV infection were tested using ELISA and shown to be IYSV positive. Two different types of IYSV symptoms have been observed on plants collected from vaious field sites in southern Michigan. Yellow diamond-shaped lesions and multiple pale green lesions with irregular margins were observed on the onion leaves. Additional symptoms include onions that have green concentric rings within the lesions. Symptomatic onions were collected from fields associated with the occurrence of thrips.

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

Smut incidence has increased. Affected cotyledons and young leaves appear blackened and slightly thickened. Heavy spore production ruptured affected leaves, exposing dark, powdery spore masses. In addition, elongated, black streaks were observed at the stem base of larger plants that survived the infection that occurred at the seedling stage.

Fungal Diseases (purple blotch, downy mildew, Botrytis)

None found in surveys or reported at this time

Bacterial Diseases (Xanthomonas, center rot, soft rots)

None found in surveys or reported at this time Onion Specialist Mary Hausbeck Professor and Extension Specialist Michigan State University Email:hausbec1@msu.edu

 

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah%20Commentary%206-19

 

Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 06/19/13

Plant growth considered normal with plants in the 6-7 leaf stage. Growers happy with growth so far and many are beginning to think about thrips sprays as pest numbers increase. Transplanted onions (limited acreage) more advanced and early bulbing occurring (swelling noted).

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 06/19/13

The northern Utah weather has been normal to above normal for early June. Average daily temperatures in mid to upper 80’s. No rain reported in last two weeks. Soils moisture considered good and growers are busy irrigating crop. Projected hot dry summer and most irrigation companies indicate that water shortages are likely. No weather related problems to report.

 

Insect Scouting, Outlook and Management Last Modified: 06/19/13

Thrips

Field surveys on-going with most fields having some thrips. Thrips populations still low in most fields with counts of >1 adult per plant and 1-3 larvae per plant.

Maggots

None reported at this time

Other

None reported at this time

 

Disease Scouting, Outlook and Management Last Modified: 06/19/13

Iris yellow spot virus

None reported at this time

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

None reported at this time

Fungal Diseases (purple blotch, downy mildew, Botrytis)

None reported at this time

Bacterial Diseases (Xanthomonas, center rot, soft rots)

None reported at this time

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