June 23, 2017

Dan Drost – Utah State Commentary – Onion ipmPIPE

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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

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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

 

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah Commentary8-11

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

Onion bulbing dominates growth with most fields in growth stage 7. Transplanted onions are being harvested (2 weeks early) and seeded onions beginning to show top-down of leaf tissues. Growers have sufficient water to deal with irrigation needs and continue to irrigate frequently due to hot weather conditions. Growers are regularly applying insecticides for thrips control and report minimal damage.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 08/11/12
Tropical moisture out of SW US dominated weather conditions in Utah. Rain showers are very local and provide less than ½ inch. Day temperatures were above normal with temperatures in hi 90’s for much of the period.

Insect Scouting, Outlook and Management Last Modified: 08/11/12
Thrips
Fifth round of field surveys occurring. Thrips populations 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: 08/11/12
Iris yellow spot virus
IYSV incidences found in several Utah onion fields but incidence and infection level very low.

Soil-borne Diseases (Damping Off, Pink Root, Fusarium)
Some fields showing patch pink root and basal rot.

Fungal Diseases (purple blotch, downy mildew, Botrytis)
Some minor damage from purple blotch noted but 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

Dan Drost – Utah State Commentary – Onion ipmPIPE

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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

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah Commentary 6-15

Utah Commentary 

 

Onion Crop Growth Stage and Status Last Modified: 06/15/12

Onion growth is strong with most planting in the 7th leaf stage.  Growers have been irrigating as

weather has been warm and dry.  Growers report few problems with weeds and early season

management has been surprisingly successful. Most are very happy with crop progress so far.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 06/15/12

No rain in northern Utah in last two weeks.  Overall day temperatures about normal during last

two weeks with no hot temperatures though there was some very cold mornings during the

weekend of 8-10 June. Storms brought some high winds but no damaging weather like heavy

rains or hail.

 

Insect Scouting, Outlook and Management Last Modified: 06/15/12

Thrips

Surveys completed during the last two weeks reported that thrips identified in all fields

evaluated.  Thrips populations still very low in most fields with counts in the range of 1-2 adults

and 1-4 larvae per plant.

 

Maggots

None reported at this time

 

Other

None reported at this time

 

Disease Scouting, Outlook and Management Last Modified: 06/15/12

Iris yellow spot virus

Not observed or reported at this time

 

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

Not observed or reported at this time

 

Fungal Diseases (purple blotch, downy mildew, Botrytis)

Not observed or reported 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

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 06/04/12 Onion growth is strong with most planting in the 5th – 6th leaf stage. Growers have begun irrigation and most have applied some nitrogen. Growers report few problems with weeds and generally are very happy with crop progress so far.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 06/04/12

No rain in northern Utah in last two weeks. Overall day temperatures well above normal and new high temperature records set in most onion production areas in last week. No damaging weather related events in last two weeks.

Insect Scouting, Outlook and Management Last Modified: 06/04/12

Thrips First full survey conducted as part of 2012 thrips-IYSV monitoring completed in Utah. Thrips have been found but overall populations still very low.

Maggots No surveys or reports at this time

Other No surveys or reports at this time

Disease Scouting, Outlook and Management Last Modified: 06/04/12

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

 

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 Commentary 5-18

Utah Commentary
Onion Crop Growth Stage and Status Last Modified: 05/18/12
Onion growth is strong with most planting in the 4th leaf stage; approximately 1,500 acres in production in Davis, Weber and Box Elder counties in 2012. Field sites getting drier and growers have applied 1st and 2nd herbicide applications (Goal and Buctril). Weed management very good as weather conditions favorable for most field operations.
Weather Impacts (temperature, rain, hail, freezing) Last Modified: 05/18/12
The northern Utah has received very little rain in last two weeks. First rain occurred on 5-18 with approximately 1/3 inch in Davis county and upwards of ¾ inches in northern onion production areas of Box Elder Co. Overall temperature conditions good with days in 70-80’s and nights in 40-50’s. No damaging weather related events in last two weeks.
Insect Scouting, Outlook and Management Last Modified: 05/18/12

Thrips
Survey and sentinel fields in Utah identified and traps and monitoring beginning. No data to report 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: 05/18/12
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

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 Commentary 5-4

Utah Commentary
Onion Crop Growth Stage and Status Last Modified: 05/4/12
Onion growth is strong with most planting in the 3rd leaf stage by the end of April. Growers applied 1st herbicide application (Goal and Buctril) in late April more than one month earlier than normal. Many growers commented that growth is exceptionally strong and probably 3-4 weeks ahead of normal. Growers optimistic and hope no additional bad weather occurs between now and the middle of May.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 05/4/12
The northern Utah has received very little rain in last two weeks. Overall temperature conditions were well above normal with the week of April 22-28 having daily high temperatures about 15-20F above average temperatures for that period. Combined high temperatures with little precipitation beginning to dry out fields.

Insect Scouting, Outlook and Management Last Modified: 05/4/12
Thrips
Discussing with growers need for survey and sentinel fields. No data to report 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: 05/4/12
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

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 Commentary 4-20

Utah Commentary
Onion Crop Growth Stage and Status Last Modified: 04/20/12
Onion production occurs in Utah only in Davis, Weber and Box Elder counties. Exceptionally good field conditions in March ensured that all seeded onions were planted by March 24. Growers with transplants (approx 150 acres) began transplanting in mid-April and completed those operations within a week. Field conditions good throughout the late March and early April periods with sufficient moisture to ensure good to excellent emergence. Plant stands some of the best in memory.
Weather Impacts (temperature, rain, hail, freezing) Last Modified: 04/20/12
The northern Utah has received some rain in last two weeks. More than one inch rain occurred during the last two weeks providing sufficient moisture for good early growth. No freezing temperatures experienced. Overall temperature conditions about normal with days in 50-60’s and nights in 35-45’s. No damaging weather related events in last two weeks.

Insect Scouting, Outlook and Management Last Modified: 04/20/12

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: 04/20/12

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

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

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

August 14, 2011 Crop growth is good and early bulbing stage achieved in most fields. Earliest plantings are in growth stage 7 (4-7.5 cm with late plantings in stage 6. Growers were please with some fields at our 9 Aug field day but expressed concern about sizing in those later planted fields as leaf initiation complete and sizing occurring. No top down reported but tip scorch noted in some areas.