June 24, 2017

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah Commentary 8-8

 

Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 08/8/13

Plant growth considered good to excellent but many fields showing some early maturity (advanced over more normal years). Most fields have bulbs in the 2+ inch size. Growers busy irrigating (no water shortages reported but several noted that irrigation companies preparing for shortages). Transplant fields scheduled to be harvested being in the next week.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 08/8/13

The Utah weather continues to be very hot with temperatures upper 90’s to low 100’s. Local records continue to be broken. Temperatures above normal expected to continue for the next week to 10 days. No rain reported in last two weeks. Soils moisture considered good as growers continue with irrigation.

Insect Scouting, Outlook and Management Last Modified: 08/8/13

Thrips

Field surveys on-going. Thrips populations remain high with counts of ranging from 3-15 adult per plant (average 4-5/plant) and 10-120 larvae per plant (average 40-50/plant). Growers are actively spraying to help control thrips. Thrips being controlled adequately when treated with insecticides but fields with high thrips counts associated with growers who purposely do not spray as often.

Maggots

None reported at this time

Other

None reported at this time

Disease Scouting, Outlook and Management Last Modified: 08/8/13

Iris yellow spot virus

Early indications of IYSV (visual) in storm damaged fields. Some symptoms noted in fields that are more stressed.

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

Pink root found in fields with history of onion production.

Fungal Diseases (purple blotch, downy mildew, Botrytis)

None reported at this time

Bacterial Diseases (Xanthomonas, center rot, soft rots)

Suspected soft rots in hail damaged field which will need confirmation. 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 7-26

 

Utah Commentary

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

Plant growth considered normal with onions with good top growth but maturity slightly advanced over normal. Most fields have bulbs in the 1½ to 2 inch size. Growers busy irrigating (no water shortages reported but they are anticipated). Most fields have been hand weeded and crews are continuing to clean up problem areas. Fields with leaf damage from localized hail are turning brown (tip drying) due to damage.

 

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

The Utah weather continues to be very hot with temperatures upper 90’s to low 100’s (record setting heat continues). Temperatures are about 10 degrees above average. No rain reported in last two weeks. 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: 07/26/13

Thrips

Field surveys on-going. Thrips populations steadily increasing with counts of ranging from 1-11 adult per plant (average 3.5/plant) and 3-104 larvae per plant (average 41/plant). Growers are using their personal spray schedules to control thrips. In general, thrips being controlled adequately when treated though some fields have very high pressure levels and feeding injury.

Maggots

None reported at this time

Other

None reported at this time

 

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

Iris yellow spot virus

Early indications of IYSV (visual) in storm damaged fields but needs additional confirmation.

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

Pink root noted in two fields in Davis Co (patchy) with history of onion production.

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

 

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

 

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

 

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

 

Dan Drost – Utah State Commentary – Onion ipmPIPE

onion 3

Utah Commentary 5-29

 

Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 05/29/13

Plant growth still a bit slow due to cool-moist conditions over last two weeks. Growers report that onions are in the 3-4 leaf stage and many report that early herbicides resulted in more damage to leaves than expected. Cool weather and lack of sun (limited wax formation) responsible for damage.

 

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 05/29/13

The northern Utah weather has been cool during late May with many forecast days. Average temperatures in upper 50’s and low 60’s. Heavy rains (1.5-2.0 inches) and some hail occurred on May 17-19 and again on May 28-29 (0.75-1.25 inches). Soils moisture considered good and growers who were going to begin irrigations have decide to wait.

 

Insect Scouting, Outlook and Management Last Modified: 05/29/13

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: 05/29/13

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 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 5-13

 

Utah Commentary

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

Field conditions have been dry during the last two weeks and growers have begun irrigation to improve soil moisture levels. Plant growth a bit slow due to cool temperatures and dry soils and growers waiting to put on first herbicides for weed management. Overall onion stands are considered good to excellent. Fields in the 1-2 leaf stage. Some frost damage noted on leaves.

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

The northern Utah has been cold-cool during early May and forecasts are for very hot for next week. Less than 1/2 inch rain occurred during the last two weeks. Soils moisture considered low and growers have begun irrigation to encourage early growth.

Insect Scouting, Outlook and Management Last Modified: 05/13/13

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: 05/13/13

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 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 4-30

 

Utah Commentary

Onion Crop Growth Stage and Status Last Modified: 04/30/13

Onion production occurs in Utah only in Davis, Weber and Box Elder counties. Good field conditions in March ensured that all seeded onions were planted by March 31. Growers with transplants (approx 150 acres) began transplanting in late-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. Seed emergence was a bit slow due to colder temperatures but overall stands are considered good to excellent.

Weather Impacts (temperature, rain, hail, freezing) Last Modified: 04/30/13

The northern Utah has been cold and dry during the last two weeks. Less than 1/2 inch rain occurred during the last two weeks. Soils do contain sufficient moisture for early growth. Significant cold and freezing temperatures experienced on Apr 17-19 with lows into mid-20’s. Otherwise temperature conditions about normal with days in 50-60’s and nights in 35-45’s. Some damage noted on cotyledons due to cold.

Insect Scouting, Outlook and Management Last Modified: 04/30/13

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: 04/30/13

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 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 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