June 24, 2017

Howard Schwartz – CO State Commentary – Onion ipmPIPE

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CO Commentary (08-09-13)

 

COLORADO Commentary

Onion Crop Growth Stage and Status Last Modified: 08/09/13

Bulbing stages continue to develop normally in transplanted and seeded onions throughout the onion regions in the state.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 08/09/13

Severe storm damage affected many onion fields in northern Colorado, causing 50 to 75% defoliation with evidence of bulb rots beginning to develop within 7 to 10 days later.

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: 08/09/13

Thrips

Thrips numbers range between 25 to 50 per plant in most production regions of Colorado; while the numbers are beginning to fall in fields approaching maturity.

Maggots

No reports at this time

Other

No reports at this time

Disease Scouting, Outlook and Management Last Modified: 08/09/13

Iris yellow spot virus

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

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

Pink root and Fusarium basal rot apparent in some fields with a history of the disease.

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

 

Howard Schwartz – CO State Commentary – Onion ipmPIPE

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CO Commentary (07-26-13)

 

COLORADO Commentary

Onion Crop Growth Stage and Status Last Modified: 07/26/13

Bulbing stages continue to develop normally in transplanted and seeded onions throughout the onion regions in the state.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 07/26/13

No reports of any storm damage occurring in onion regions.

Temperature Outlook* [2 – 4 weeks]: Average

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

*Courtesy of Planalytics, Inc.

 

Insect Scouting, Outlook and Management Last Modified: 07/26/13

Thrips

Thrips levels are past established thresholds and growers are continuing to use various insecticide control measures. Thrips numbers range between 25 to 50 per plant in most production regions of Colorado.

Maggots

No reports at this time

Other

No reports at this time

 

Disease Scouting, Outlook and Management Last Modified: 07/26/13

Iris yellow spot virus

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

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

Pink root and Fusarium basal rot apparent in some fields with a history of the disease.

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

 

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

 

Howard Schwartz – CO State Commentary – Onion ipmPIPE

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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

 

Howard Schwartz – CO State Commentary – Onion ipmPIPE

onion 2

CO Commentary (06-05-13)

 

COLORADO Commentary

Onion Crop Growth Stage and Status Last Modified: 06/05/13

Warm, dry conditions persist but storms are forecasted for June throughout eastern and southern Colorado. The seeded and transplanted crops are beginning to catch up due to warmer conditions during late May.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 06/05/13

No reports of any storm damage occurring in onion regions.

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: 06/05/13

Thrips

No surveys or reports at this time.

Maggots

No surveys or reports at this time

Other

No surveys or reports at this time

 

Disease Scouting, Outlook and Management Last Modified: 06/05/13

Iris yellow spot virus

No surveys or 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  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

 

Howard Schwartz – CO State Commentary – Onion ipmPIPE

onion 2

CO Commentary (05-14-13)

 

COLORADO Commentary

Onion Crop Growth Stage and Status Last Modified: 05/14/13

Warm, dry conditions persist and are forecasted for May throughout Colorado, with few reports of any storm damage occurring in onion regions. Onion acreage is down this year due to severe drought in southern region. The seeded and transplanted crops are behind this season due to the cool conditions until this week.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 05/14/13

The northern region received significant snow and rain in recent weeks, while other regions of the state received less than 0.25 inches or no rain. Temperatures are now reacing the 70s and 80s during the day, and low to mid 50s 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: 05/14/13

Thrips

No surveys or reports at this time.

Maggots

No surveys or reports at this time

Other

No surveys or reports at this time

Disease Scouting, Outlook and Management Last Modified: 05/14/13

Iris yellow spot virus

No surveys or 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 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

 

Howard Schwartz – Colorado State Commentary – Onion ipmPIPE

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STATE COMMENTARY
October 8, 2012 by hschwartz
Colorado Commentary (10-08-12)  COLORADO Onion harvest of transplanted onions (during August to September) and seeded onions (during September to October) resulted generally in average to above average yields due to light to moderate pest and disease pressure throughout the state.  High temperature and low moisture stress did contribute to higher incidences of Pink Root and Fusarium basal rot in fields of susceptible varieties, but bacterial and fungal disease pressure was light; followed by low to moderate pressure from IYSV in some fields.  Storage rot should not be an issue for the high quality bulbs that are going to storage and market.

Howard Schwartz – CO State Commentary – Onion ipmPIPE

onion 2

CO Commentary (09-07-12)

 

COLORADO Commentary

Onion Crop Growth Stage and Status Last Modified: 09/07/12

Thrips pressure is dropping off as plants mature in Eastern, Southern and Western Regions of the state. Risk Models show that Thrips and IYSV are at Mium to High Risk, while foliar bacterial and fungal threats remain at Medium Risk in most regions due to persistent high temperatures and low moisture conditions.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 09/07/12

Most regions of the state received little or no rain in the last week. Temperatures have averaged in the mid 80s to low 90s during the day, and mid 50s to low 60s in the evening.

Temperature Outlook* [2 – 4 weeks]: Normal

Precipitation Outlook* [2 – 4 weeks]: Normal

*Courtesy of Planalytics, Inc.

Insect Scouting, Outlook and Management Last Modified: 09/07/12

Thrips – Populations declining in most fields as plants approach maturity.

Maggots – No reports at this time Other – No other reports at this time.

Disease Scouting, Outlook and Management Last Modified: 09/07/12

Iris yellow spot virus – IYSV detected in surveys of seeded onions (trace to more than 75%) sampled in northern and southern regions.

Soil-borne Diseases (Damping Off, Pink Root, Fusarium) – Pink Root and Fusarium basal rot incidence light to moderate in affected fields throughout the state.

Fungal Diseases (purple blotch, downy mildew, Botrytis) – No reports at this time. Late-season fungicide protection of foliage and necks is recommended for storage rot control; combined with good curing of onions in the field and storage.

Bacterial Diseases (Xanthomonas, center rot, soft rots) – Surveys from all regions detected trace soft rot and leaf blight infections. Late-season bactericide protection of foliage and necks is recommended for storage rot control; combined with good curing of onions in the field and storage.

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

Howard Schwartz – Colorado State Commentary – Onion ipmPIPE

onion 2

CO Commentary (08-10-12)

COLORADO Commentary
Onion Crop Growth Stage and Status Last Modified: 08/10/12

Thrips pressure remains moderate to high in Eastern, Southern and Western Regions of the state. Risk Models show that Thrips and IYSV are at High Risk, while foliar bacterial and fungal threats remain at Medium Risk in most regions due to persistent high temperatures and low moisture conditions.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 08/10/12
Most regions of the state received little or no rain in the last week. 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]: Normal
Precipitation Outlook* [2 – 4 weeks]: Normal
*Courtesy of Planalytics, Inc.

Insect Scouting, Outlook and Management Last Modified: 08/10/12
Thrips – Surveys detected up to 60 (larvae + adult) thrips in commercial fields on transplants or seeded onions.
Maggots – No reports at this time
Other – No other reports at this time.

Disease Scouting, Outlook and Management Last Modified: 08/10/12
Iris yellow spot virus – IYSV detected in surveys of transplanted and seeded onions (trace to more than 50%) sampled in northern and southern regions.

Soil-borne Diseases (Damping Off, Pink Root, Fusarium) – Pink Root observed in numerous fields of transplanted and seeded onions in Colorado. Fusarium basal rot becoming more common in affected fields throughout the state.

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

Bacterial Diseases (Xanthomonas, center rot, soft rots) – Surveys from all regions detected trace soft rot and leaf blight infections.

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

Howard Schwartz – Colorado State Commentary – Onion ipmPIPE

onion 2

CO Commentary (07-27-12)

COLORADO Commentary
Onion Crop Growth Stage and Status Last Modified: 07/27/12
Thrips pressure remains moderate to high in Eastern, Southern and Western Regions of the state. Risk Models show that Thrips and IYSV are at High Risk, while foliar bacterial and fungal threats remain at Medium Risk in most regions due to persistent high temperatures and low moisture conditions.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 07/27/12
Most regions of the state received little or no rain in the last week. 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 reports at this time
Other – No other reports at this time.

Disease Scouting, Outlook and Management Last Modified: 07/27/12
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 5% in affected fields throughout the state.
Fungal Diseases (purple blotch, downy mildew, Botrytis) – No reports at this time
Bacterial Diseases (Xanthomonas, center rot, soft rots) – Surveys from all regions detected trace soft rot and leaf blight infections.

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