Search Results
Your search for "All Alerts" in All Alerts
yielded 2135 results.
Swipe Left or Right to navigate Alerts
August 12, 2016 – Psyllid numbers fall compared to recent weeks
Potato All Locations
potato psyllids
Posted on: August 12, 2016 by Amy Carroll
Only three potato psyllids collected last week tested positive for Lso (liberibacter), the bacterium that causes zebra chip. Lso-positive psyllids were found in the following counties: Canyon (1 field) and Gooding (1 field). One nymph collected from a leaf sample on an Intense field in Canyon County tested positive.
Potato psyllids were collected this week on sticky traps in potato in the following counties: Malheur (OR) (1 field), Payette (3 fields), Owyhee (5 fields), Canyon (13 fields), Ada (1 field), Elmore (2 fields), Gooding (3 fields), Twin Falls (6 fields), Jerome (2 fields), Minidoka (2 fields), and Cassia (1 field). Additionally, potato psyllid nymphs (3 total) were captured on leaf samples from Ada County (1 field) and Jerome County (1 field), with two potato psyllids being captured from a vacuum sample taken from one Intense field in Canyon County.
We collected 260 psyllids this week from sticky cards (190 from Light sites and 70 from Intense sites). Of the total 262 psyllids captured this week, 233 came from the Treasure Valley. We found psyllids in 39 of the 97 fields (40%) that were sampled this week.
Because of the recent prevalence of Lso and the relatively high numbers of potato psyllids that we have been collecting each week, we urge growers to maintain their IPM programs targeting psyllids and to be on the lookout for plants exhibiting ZC symptoms over the coming weeks. Foliar symptoms should be manifested about three weeks following inoculation, but will need to be confirmed by examining and testing tubers. See link below for description and photos of ZC symptoms, and please take suspicious plant samples to the Kimberly R&E Center or to your local UI Extension Center.
More information and resources on potato psyllids and ZC, including management, scouting recommendations, and ZC symptomology can be found at the links below.
http://oregonstate.edu/dept/hermiston/sites/default/files/pnw633_0.pdf
Detailed results from the “Light” sites can be found here:
https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
Detailed results from the “Intense” sites can be found here:
https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
» http://www.uidaho.edu/extension/news/psyllid-management
» https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
» https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
Corn Earworm moth counts for August 10
Corn Treasure Valley
corn earworm
Posted on: August 10, 2016 by Jerry Neufeld
Below is the final corn earworm count for this year. There didn’t seem to be a lot of corn earworm this year. That is what I have found for the last couple of years. I would appreciate hearing from you if you had a different experience.
Dry Lake 4
Kuna 1
Melba 10
Homedale 14
Wilder 8
Parma 2
Caldwell 0
total 39
Cercospora Leaf Spot and Black Bean Aphid in Sugarbeets
Sugarbeets All Locations
Cercospora Leaf Spot and Black Bean Aphid
Posted on: August 8, 2016 by Jerry Neufeld
AMSCO Pathologist Dr. Oliver Neher is reporting that Cercospora leaf spot has been confirmed in sugarbeet fields in the Wendell and Rupert areas. The recent weather conditions have been favorable for disease development. According to the 2016 PNW Plant Disease Handbook, “High humidity or free moisture and high temperatures (77°F to 95°F days, nights above 60°F) favor infection”. Many of the currently grown high-yielding sugarbeet varieties are susceptible or moderately susceptible to Cercospora. The 2016 PNW Plant Disease Handbook lists several fungicides that can be applied to treat this disease. Click on the link below for this information. The other link below directs to an extension bulletin published by the North Dakota State University and contains additional information for disease management. Dr. Neher is also reporting that black bean aphid is being found in these areas. You may be able to tank mix insecticides for black bean aphid with fungicides used for Cercospora. Contact your crop consultant from Amalgamated Sugar Company for more information.
» http://pnwhandbooks.org/plantdisease/sugar-beet-beta-vulgaris-cercospora-leaf-spot
August 5, 2016 – Positive psyllids in Payette, Canyon, and Ada counties
Potato All Locations
potato psyllids
Posted on: August 5, 2016 by Amy Carroll
Several potato psyllids collected last week tested positive for Lso (liberibacter), the bacterium that causes zebra chip. Lso-positive psyllids were found in the following counties: Payette (1 field), Canyon (7 fields), and Ada (1 field). This is fewer than the previous two weeks.
Potato psyllids were collected this week on sticky traps in potato in the following counties: Malheur (OR) (1 field), Payette (3 fields), Owyhee (5 fields), Canyon (13 fields), Ada (2 fields), Elmore (2 fields), Gooding (1 field), Twin Falls (4 fields), Jerome (6 fields), Minidoka (3 fields), Cassia (4 fields), Power (3 fields), and Bingham (1 field). Additionally, potato psyllid nymphs (26 total) were captured on leaf samples from Ada County (2 fields) and Canyon County (2 fields), with three potato psyllids being captured from a vacuum sample taken from one Intense field in Canyon County.
We collected 379 psyllids this week from sticky cards (263 from Light sites and 116 from Intense sites). Of the total 379 psyllids captured this week, 308 came from the Treasure Valley. We found psyllids in 48 of the 101 fields (48%) that were sampled this week.
Because of the recent prevalence of Lso and the relatively high numbers of potato psyllids that we have been collecting each week, we urge growers to maintain their IPM programs targeting psyllids and to be on the lookout for plants exhibiting ZC symptoms over the coming weeks. Foliar symptoms should be manifested about three weeks following inoculation, but will need to be confirmed by examining and testing tubers. See link below for description and photos of ZC symptoms, and please take suspicious plant samples to the Kimberly R&E Center or to your local UI Extension Center.
More information and resources on potato psyllids and ZC, including management, scouting recommendations, and ZC symptomology can be found at the links below.
http://oregonstate.edu/dept/hermiston/sites/default/files/pnw633_0.pdf
Detailed results from the “Light” sites can be found here:
https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
Detailed results from the “Intense” sites can be found here:
https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
» http://www.uidaho.edu/extension/news/psyllid-management
» https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
» https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
Corn Smut
Landscape and Garden All Locations
Corn Smut (Ustilago maydis)
Posted on: August 5, 2016 by Rich Guggenheim
Corn Smut has been spotted on sweet corn in gardens.
Corn Smut is edible.
There are no chemical controls for infected plants. Control is limited to a few cultural practices. Remove and dispose of smut galls before they rupture and release the black sooty spores. Remove and destroy all plant debris in the fall and practice crop rotation the following year. Avoid plant injury during cultivation, as this promotes disease development.
» http://sweetcorn.illinois.edu/Common-smut/Recipes.htm
» http://www.extension.umn.edu/garden/yard-garden/vegetables/corn-smut/
» http://www.apsnet.org/edcenter/intropp/lessons/fungi/Basidiomycetes/Pages/CornSmut.aspx
Powdery Mildew on Cucurbit crops
Landscape and Garden All Locations
Powdery Mildew
Posted on: August 5, 2016 by Rich Guggenheim
Powdery Mildew has been spotted on cucurbit crops. Applications of fungicides are preventative, not curative. Best management practices include:
Plant in a sunny location wherever possible
Make sure there’s good air circulation (through plant spacing and pruning)
Promote steady growth with moderate application of nitrogen fertilizer (or use a time release fertilizer)
In a sunny dry location, an occasional spray of water can be used to wash the PM from the plant
Remove and discard infected material, take special care in the fall to reduce the amount material available for over wintering
» https://www.mastergardeners.org/publications/powderyMildew.html
» http://ipm.ucanr.edu/PMG/r116100711.html
» http://vegetablemdonline.ppath.cornell.edu/factsheets/Cucurbits_PM.htm
» http://articles.extension.org/pages/30604/managing-cucurbit-powdery-mildew-organically
Corn Earworm counts for August 4
Corn Treasure Valley
corn earworm
Posted on: August 4, 2016 by Jerry Neufeld
Here are the corn earworm moth counts from this morning. The greatest number of moths were trapped in the Homedale area. Still, the numbers are fairly low. According to a Purdue Extension publication entitled CORN INSECT CONTROL RECOMMENDATIONS – 2016, “control is only economically justified on seed, sweet, or popcorn. Treat if 10 or more moths for several consecutive nights are captured in an earworm pheromone trap just before or during silking.” You may want to scout cornfields, especially n the Homedale area, for this pest.
Dry Lake 5
Kuna 6
Melba 7
Homedale 27
Wilder 5
Parma 3
Caldwell 1
total 54
Grassy Weed Control in Turf
Landscape and Garden All Locations
Grassy weeds in lawn
Posted on: August 4, 2016 by Rich Guggenheim
Weeds of various types in turf and laws are being brought in for identification and control. Proper control will require identification of the weed, a service provided for free by your local University of Idaho Extension Office.
Non chemical control methods including mowing your lawn as high as practical for your turf variety- usually 3-4 inches, deep watering of your lawn, proper fertilization usually in the fall, and core aeration can be very effective at aiding in control of weeds in your lawn.
» http://ipm.ucanr.edu/PMG/WEEDS/goosegrass.html
» https://njaes.rutgers.edu/pubs/e233/
» http://extension.colostate.edu/topic-areas/yard-garden/lawn-care-7-202/
July 29, 2016 – More Lso-positive psyllids found in Treasure and Magic Valleys
Potato All Locations
potato psyllids
Posted on: July 29, 2016 by Amy Carroll
Last week we reported on a sharp increase in the prevalence of Lso-positive psyllids relative to the previous weeks this season. Out of an abundance of caution to avoid reporting any false positives, we re-tested a subset of those positive psyllids and we stand by our original results. The sites during Week 9 with putative positive psyllids that we had labelled as “pending” are now labelled as “positive.”
In addition, several potato psyllids collected last week tested positive for Lso (liberibacter), the bacterium that causes zebra chip. Lso-positive psyllids were found in the following counties: Payette (1 field), Owyhee (1 field), Canyon (6 fields), Twin Falls (2 fields), Minidoka (2 fields), and Cassia (1 field). Furthermore, two potato psyllid nymphs collected from leaf samples from a field in Ada County tested positive for Lso.
Potato psyllids were collected this week on sticky traps in potato in the following counties: Malheur (OR) (1 field), Payette (3 fields), Owyhee (5 fields), Canyon (13 fields), Ada (2 fields), Elmore (2 fields), Twin Falls (8 fields), Jerome (2 fields), Cassia (2 fields), and Power (1). Additionally, potato psyllid nymphs were captured on leaf samples from 2 fields in Ada County, and two potato psyllids were captured from vacuum samples taken from Intense fields in Canyon and Ada County.
We collected 361 psyllids this week from sticky cards (246 from Light sites and 115 from Intense sites). Of the total 363 psyllids captured this week, 335 came from the Treasure Valley. We found psyllids in 40 of the 101 fields (40%) that were sampled this week.
Because of the recent prevalence of Lso and the relatively high numbers of potato psyllids that we have been collecting each week, we urge growers to maintain their IPM programs targeting psyllids and to be on the lookout for plants exhibiting ZC symptoms over the coming weeks. Foliar symptoms should be manifested about three weeks following inoculation, but will need to be confirmed by examining and testing tubers. See link below for description and photos of ZC symptoms, and please take suspicious plant samples to the Kimberly R&E Center or to your local UI Extension Center.
More information and resources on potato psyllids and ZC, including management, scouting recommendations, and ZC symptomology can be found at the links below.
http://oregonstate.edu/dept/hermiston/sites/default/files/pnw633_0.pdf
Detailed results from the “Light” sites can be found here:
https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
Detailed results from the “Intense” sites can be found here:
https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
» http://www.uidaho.edu/extension/news/psyllid-management
» https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
» https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
Cicada Killer (Sphecius grandis)
Landscape and Garden All Locations
Cicada Killer (Sphecius grandis)
Posted on: July 29, 2016 by Rich Guggenheim
Cicada Killers are being brought into local Extension Offices. Cicada killers are very large wasps, ranging 3-5 cm in length and resemble a very large yellowjacket wasp. Control of cicada killers is rarely recommended and can be difficult to achieve. The insects are not aggressive and have a beneficial role in managing cicada populations.
» https://bspm.agsci.colostate.edu/files/2013/03/Cicada-Killers.pdf
» https://utahpests.usu.edu/schoolIPM/htm/pest-id-guide/stinging-insects/sand-wasps-cicada-killer
Wasps, Hornets, and YellowJackets
Landscape and Garden All Locations
Wasps, hornets, and yellowjackets
Posted on: July 29, 2016 by Rich Guggenheim
Wasps, hornets, and Yellowjackets are being seen in numerous yards and gardens this year.
Different methods, including non-chemical are available. Click the links below for more information.
» https://www.cals.uidaho.edu/edcomm/pdf/CIS/CIS1218.pdf
» http://extension.uidaho.edu/clearwater/files/2014/11/Homeowner-Guide-to-Minor-Stinging-Insects2.pdf
» http://extension.colostate.edu/topic-areas/insects/nuisance-wasps-and-bees-5-525/
Corn Earworm moth counts for July 27
Corn Treasure Valley
corn earworm
Posted on: July 27, 2016 by Jerry Neufeld
I am still not seeing much in the way of corn earworm moths. Below is the count that was taken this morning.
Location 7/27
Dry Lake 1
Kuna 0
Melba 4
Homedale 2
Wilder 2
Parma 2
Caldwell 0
Total 11
Increase in Lso-positive psyllids in Treasure and Magic Valleys
Potato All Locations
potato psyllids
Posted on: July 22, 2016 by Erik Wenninger
Numerous potato psyllids collected last week tested positive for Lso (liberibacter), the bacterium that causes zebra chip. Lso-positive psyllids were found in the following counties: Payette (1 field), Owyhee (1 field), Canyon (4 fields), Twin Falls (3 fields), and Jerome (1 field).
This represents a sharp increase in the prevalence of Lso-positive psyllids relative to the previous weeks this season. We are quite certain that these results are accurate; however, out of an abundance of caution to avoid reporting any false positives, we are in the process of retesting several samples that did not show as strong a positive result as others. Those sites collected during Week 9 that we believe to be positive but are being retested are marked on the spreadsheet (links provided below) as “pending” in the “% Lso+ psyllids” column. We expect to update these data next week when results from the additional tests come in. We collected psyllids that we believe to be positive but that currently have a status of Lso “pending” in the following counties: Payette (2 fields), Owyhee (2 fields), Canyon (2 fields), Ada (1 field), and Jerome (1 field).
Regardless, there clearly has been an increase in the prevalence of Lso-positive psyllids as well as relatively high numbers of psyllids overall. Therefore, we urge growers to maintain their IPM programs targeting psyllids and to be on the lookout for plants exhibiting ZC symptoms over the coming weeks. Foliar symptoms should be manifested about three weeks following inoculation, but will need to be confirmed by examining and testing tubers. See link below for description and photos of ZC symptoms, and please take suspicious plant samples to the Kimberly R&E Center or to your local UI Extension Center.
Potato psyllids were collected this week on sticky traps in potato in the following counties: Malheur (OR) (1 field), Payette (3 fields), Owyhee (5 fields), Canyon (13 fields), Ada (2 fields), Elmore (1 field), Twin Falls (2 fields), Jerome (3 fields), Gooding (1 field), Minidoka (2 fields), and Cassia (6 fields).
We collected 245 psyllids this week from sticky cards (179 from Light sites and 66 from Intense sites). Two potato psyllids were collected in a vacuum sample on an Intense site in Canyon County, and four nymphs were found on leaf samples from an Intense site in Ada County. Of the total 247 psyllids captured this week, 152 came from the Treasure Valley. We found psyllids in 38 of the 103 fields (37%) that were sampled this week.
More information and resources on potato psyllids and ZC, including management, scouting recommendations, and ZC symptomology can be found at the links below.
http://oregonstate.edu/dept/hermiston/sites/default/files/pnw633_0.pdf
Detailed results from the “Light” sites can be found here:
https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
Detailed results from the “Intense” sites can be found here:
https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
» http://oregonstate.edu/dept/hermiston/sites/default/files/pnw633_0.pdf
» https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
» https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
Corn Earworm counts for July 22
Corn Treasure Valley
corn earworm
Posted on: July 22, 2016 by Jerry Neufeld
A few corn earworm moths (adults) are starting to show up in the traps I set out earlier this week. Although, the numbers are low. Below are the moth counts from this morning, July 22.
Dry Lake 0
Kuna 1
Melba 4
Homedale 4
Wilder 1
Parma 0
Caldwell 1
11
I am not aware of treatment thresholds for this pest in Idaho, however, the following excerpt was taken from an Extension Publication from Purdue University.
Management Guidelines
Corn Insect Control Recommendations: E-series 219-W
For seed production fields, if 10 or more moths are captured in a pheromone trap for several consecutive nights, economic damage is possible. However, only fields silking and/or pollinating during this time are candidates for treatment.
You may want to step up your field scouting and work closely with your crop consultant to determine if a treatment is necessary.
Tobacco Budworm in Roses, Petunias, Geraniums.
Landscape and Garden All Locations
Tobacco/ Geranium budworm (Helicoverpa virescens)
Posted on: July 21, 2016 by Rich Guggenheim
The Tobacco budworm (Heliothis virescens) causes damage to roses, petunias, geraniums, and the flower buds of other ornamental garden plants. Control methods include scouting and hand picking at dusk, roto-tilling, and planting less susceptible plant material.
On geraniums, insecticidal control is difficult because caterpillars are protected from applications inside the flowerbuds and stems. Consider planting ivy geraniums instead of standard geraniums.
On petunias pyrethrin insecticides can provide good control. Look for products containing the active ingredients permethrin, cyfluthrin, or bifenthrin. Always read and follow all label direction.
» http://extension.colostate.edu/topic-areas/insects/tobacco-geranium-budworm-5-581/
» http://www.colostate.edu/Dept/CoopExt/4dmg/Pests/budworm.htm
Annual Fruit Field Day in Parma! Mark your calendars!
Landscape and Garden All Locations
Posted on: July 18, 2016 by Dian Roberson
The University of Idaho Annual Fruit Field Day will be held on Friday September 16; 2016, 8:30 am to 1:00 pm at the U of I Parma Research and Extension Center Pomology Orchard and Vineyard site, about 4 miles north of Parma, Idaho. The registration will start at 8:30 am and program will start at 9:00 am (sharp). Several cultivars of new table grapes, peaches, nectarines, apples, plums, quince, Asian pears, and other alternative fruits will be presented during the tour. See the attached document below!
July 15, 2016 – First Lso-positive psyllid found in Magic Valley this year
Potato All Locations
potato psyllids
Posted on: July 15, 2016 by Amy Carroll
One potato psyllid collected last week on a sticky card from a potato field in Jerome County tested positive for Lso (liberibacter), the bacterium that causes zebra chip. All other psyllids collected last week tested negative for Lso.
Potato psyllids were collected this week on sticky traps in potato in the following counties: Malheur (OR) (1 field), Payette (3 fields), Owyhee (3 fields), Canyon (11 fields), Ada (2 fields), Elmore (1 field), Twin Falls (4 fields), Jerome (1 field), and Gooding (1 field). This is the first potato psyllid captured in Gooding County this year.
We collected 100 psyllids this week from sticky cards (69 from Light sites and 30 from Intense sites). One potato psyllid was collected in a vacuum sample on an Intense site in Twin Falls County. Of the total 100 psyllids captured this week, 92 came from the Treasure Valley.
We had traps deployed in 105 of the 107 fields (98%) that will be monitored this year. We found psyllids in 27 of the 105 fields (26%) that were looked at this week.
As always, we urge growers and crop consultants to have an IPM program in place. More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the links below.
http://www.uidaho.edu/extension/news/psyllid-management
Detailed results from the “Light” sites can be found here:
https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
Detailed results from the “Intense” sites can be found here:
https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
» http://www.uidaho.edu/extension/news/psyllid-management
» https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
» https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
Curly Top Virus in Tomatoes
Landscape and Garden All Locations
Curly top Virus
Posted on: July 15, 2016 by Rich Guggenheim
Curly top virus has been spotted in tomatoes.
Visual symptoms of tomatoes infected with Curly top virus are leafs curl up and turn yellow wth purple along the veins.
Curly top virus is transmitted by the beet leafhopper. There are no effective chemical controls. Use row covers to protect tomato plants from leafhoppers.
» http://extension.colostate.edu/docs/pubs/garden/02949.pdf
» http://extension.usu.edu/files/publications/factsheet/curly-top-tomato08.pdf
» http://entoweb.okstate.edu/ddd/diseases/curlytop.htm
» http://cals.arizona.edu/yavapai/anr/hort/byg/archive/curlytopvirus2013.html
Corn Earworm 2016
Corn Treasure Valley
corn earworm
Posted on: July 11, 2016 by Jerry Neufeld
I am once again collaborating with Charter Seed Co. and Crookham Seed Co. on a project to trap corn earworm moths. Traps will be set out in corn fields at various locations near Dry Lake, Kuna, Melba, Wilder, Homedale, and Caldwell. I will check the traps every few days and post the moth counts to this website.
There are a couple of models that can be used to predict the emergence of the summer generation of corn earworm moths. This is the generation of moths that lay eggs in corn that is silking at the time of their emergence.
One model uses January 1 as a biofix, 55 and 92 as the temperature parameters and predicts the summer moths will appear after 1300 growing degree days (GDD). These moths will then begin laying eggs in fresh corn silk. This model also estimates the eggs will hatch and larvae will begin feeding on corn ears 73 GDD later. According to this model, we will reach 1300 GDD in the Parma area on 7/23 and 1300 GDD in the Caldwell area on 7/23. Egg laying in most, if not all, Treasure Valley locations will take place about this same time. This is about 9 days later than 2015.
The second model simply uses 8/1 as the default date that the summer moths will emerge and begin laying eggs in fresh corn silk. I do not think this model will be of value this year.
Traps will go out early next week. The first moth counts will be posted a few days after the traps are set out.
The links below will take you to the websites where you can view the growing degree day model and also view various treatment methods based on the type of corn that you are growing.
» http://insect.pnwhandbooks.org/vegetable-seed/corn/corn-seed-corn-earworm-sweet-corn-only
» http://insect.pnwhandbooks.org/vegetable/vegetable-pests/hosts-and-pests/corn-sweet-corn-earworm
» http://insect.pnwhandbooks.org/agronomic/field-and-silage-corn/field-and-silage-corn-corn-earworm
July 8, 2016 – Increasing psyllid numbers in Treasure Valley
Potato All Locations
potato psyllids
Posted on: July 8, 2016 by Amy Carroll
All of the psyllids collected last week tested negative for Lso, the bacterium that causes zebra chip.
Potato psyllids were collected this week on sticky traps in potato in the following counties: Malheur (OR) (1 field), Payette (3 fields), Canyon (12 fields), Ada (2 fields), Elmore (1 field), Twin Falls (1 field), Jerome (1 field), and Power (1 field). We collected 99 psyllids this week from sticky cards (67 from Light sites and 32 from Intense sites).
Of the total 99 psyllids captured this week, 96 came from the Treasure Valley. Two of these psyllids were from vacuum samples taken from an Intense site in Canyon County.
We had traps deployed in 100 of the estimated 107 fields (93%) that will be monitored this year, although we are still waiting for cards from 10 sites to be delivered and processed. We found psyllids in 22 of the 90 fields (24%) that were looked at this week.
As always, we urge growers and crop consultants to have an IPM program in place. More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the links below.
http://www.uidaho.edu/extension/news/psyllid-management
Detailed results from the “Light” sites can be found here:
https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
Detailed results from the “Intense” sites can be found here:
https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
» http://www.uidaho.edu/extension/news/psyllid-management
» https://docs.google.com/spreadsheets/d/1EruNcKgfqJ0RUpleaHBpODfwBZIqDyT4l-9MPKZBYcY/edit#gid=0
» https://docs.google.com/spreadsheets/d/1Uk6GBxEgZeGWWhT84wymaWfHRs2it_Eg02eWPFLgWsI/edit#gid=0
UI Cereals Field Days and Extension Variety Trials
Small Grains All Locations
Cereal Insects and Pathology, Cereals Breeding, Cereal Agronomy
Posted on: July 7, 2016 by Juliet Marshall
Come join our Cereals Field Days to learn about new cereal varieties and pests!
July 12th at Idaho Falls starting at 4 PM.
UI and Bonneville County Grain Growers
Meet at Marc Thiels
West side of road just north of W 17th South
2550 S 45th W
Idaho Falls, ID
July 13th at Aberdeen R&E Center, starting at 8:30 AM
1693 S 2700 W
Aberdeen, ID 83210
Powdery Mildew in Sugarbeets 2016
Sugarbeets All Locations
powdery mildew
Posted on: July 7, 2016 by Jerry Neufeld
Powdery mildew has been found by Amalgamated Sugar Company Crop Consultants in the Adrian, Oregon area. There are several fungicides available for use to treat powdery mildew. Depending on the disease pressure, applications with different chemistries should be repeated every 14 to 21 days. Contact your crop consultant from the Amalgamated Sugar Company if you have questions about treatment options.
Click on the links below for the powdery mildew page in the PNW Plant Disease handbook.
» http://pnwhandbooks.org/plantdisease/sugar-beet-beta-vulgaris-powdery-mildew
Black Bean Aphid in Sugarbeets 2016
All Crops All Locations
Black Bean Aphid
Posted on: July 7, 2016 by Jerry Neufeld
Amalgamated Sugar Company Field Staff are reporting the Black bean aphids have been found in the Dry Lake Area of Canyon County. In 2015, UI Extension Entomologist Dr. Erik Wenninger posted this information about black bean aphids. The black bean aphid is a dark-bodied aphid, about 1/16 inch long; individuals may be winged or wingless. Aphids may be found on the young leaves within the crown of sugar beets. Infestations usually occur as scattered hot spots or along edges rather than uniformly across the entire field. Colonies can produce massive amounts of honeydew, which causes a black, sooty mold to cover the leaves.
There are no formal economic thresholds for insecticide treatment decisions for bean aphids, but treatment should be considered if fields are under heavy pressure. When scouting a field, it is important to sample plants in several representative areas across a field, because infestations may be patchy. Also, several predators (notably, lady beetles) and parasites attack bean aphids and may effectively suppress aphid populations. Therefore, it is advisable to assess natural enemy populations when making a decision on whether to apply insecticides. In addition to sugar beets, black bean aphids may be found in other crops, including beans and corn.
You may be able to tank mix insecticides for black bean aphid with fungicides used for powdery mildew. Make sure to read and follow the label and contact your Field Consultant from AMSCO for more treatment options.
For current information on registered insecticides, consult the Pacific Northwest Insect Management Handbook by clicking on the link below.
» http://insect.pnwhandbooks.org/agronomic/sugar-beet/sugar-beet-aphid
White Grub control methods need to be applied now.
Landscape and Garden All Locations
Lawn Grubs
Posted on: July 5, 2016 by Rich Guggenheim
July and August is the time to apply control methods for white grubs and June beetles.
One way to control them is to simply grow a vigorous lawn. Healthier plants have fewer pests and are more tolerant of infestations. Aerate lawns in the spring and fall, and apply fertilizer in the fall. Proper irrigation and mowing at a height of 3.5 to 4 inches will help establish and maintain a vigorous lawn.
Other options include insecticides such as imidacloprid.
Organic methods include Heterorhabditis spp. nematodes and or Steinernema carpocapsae nematodes.
Proper timing of insecticides is critical for effective control of lawn grubs.
» http://extension.colostate.edu/topic-areas/insects/billbugs-and-white-grubs-5-516/
» http://ipm.ucanr.edu/TOOLS/TURF/PESTS/inbill.html
» http://utahpests.usu.edu/htm/utah-pests-news/utah-pests-news-fall-2014/billbug-management/
2016 Miller Research Potato Pest Management Field Day
Potato All Locations
Posted on: July 5, 2016 by Jeff Miller
The 2016 Miller Research Potato Pest Management Field Day will be held Wednesday, August 17 from 9:00-10:30 am. Please see the attached page for details.
