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2021 Apple Codling Moth, Third Generation
General Landscape and Garden Treasure Valley
Codling Moth Cydia pomonella
Posted on: August 5, 2021 by Nic Usabel
The third generation of codling moth egg hatch is forecasted to begin August 10. Current degree day models indicate 2030 DD as of August 4. Third generation egg hatch begins at 2160-2200 DD.
Continue to keep fruit protected through September 15. Protection of fruit can stop after this time even if fruit has not been harvested. By mid-September there is not enough day length to signal eggs on the fruit to hatch.
Follow label directions for harvest and post-harvest requirements.
Reference Materials:
- PNW Management Handbook: Codling Moth
- Codling Moth, Utah State University
- Codling Moth, Colorado State University
Corn Earworm Counts - 8/4/21
Corn Treasure Valley
corn earworm
Posted on: August 4, 2021 by Jerry Neufeld
Below are the corn earworm moth counts from this morning, August 4. The counts are increasing in certain areas, as you can see below. If you have corn with fresh silk you may want to increase your scouting in areas where the counts are increasing.
Location Date
23-Jul 28-Jul 4-Aug
South of Nampa 2 2 9
Melba 1 0 0
Homedale 4 12 21
Wilder 3 3 29
Roswell 0 4 22
Middleton 2 0 3
Total 12 21 84
UI Ag Talk Tuesday August 3 11:00 AM (MT)
All Crops All Locations
General announcment
Posted on: August 3, 2021 by Kasia Duellman
The next University of Idaho Ag Talk Tuesday session is Tuesday, August 3 at 11 AM (MT).
Join and listen to or actively participate in round table crop updates, followed by featured topics.
The Featured topics and presenters for the 8/3 session are:
Teff: benefits, production practices, and current market situation — Ms Ritika Lamichhane, MS student (advised by Olga Walsh, Extension Cropping Systems Agronomy)
Potato cropping systems trials at Aberdeen R&E Center - Pam Hutchinson (Extension Specialist — Potato Cropping Systems Weed Scientist
Selected research projects aimed at managing tuber-borne diseases - Kasia Duellman, seed potato specialist
Registration is required. Please visit our website for more information and to register: www.uidaho.edu/ag-talk
Psyllid Update July 29, 2021
Potato All Locations
Potato Psyllid
Posted on: July 29, 2021 by Lucy Standley
This week we
had traps deployed in all 73 fields monitored this year. We found a total of 126
psyllids across 36 (49%) of the 73 fields.
Psyllids were
collected on sticky traps in potato in the following counties: Canyon (11
fields), Owyhee (2 fields), Elmore (2 fields), Payette (1 field), Gem (1
field), Gooding (2 fields), Jerome (4 fields), Twin Falls (6 fields), Cassia (2
fields), Minidoka (3 field), and Power (2 fields).
Psyllid
captures overall declined a bit from last week. Contour maps (see links below)
still graphically reflect relatively high abundance of psyllids collected in
some fields in the western Treasure Valley and Elmore County, but both areas
show more moderate incidence of psyllids than last week. Moderate captures were
recorded in the Magic Valley, and we continue to see very few psyllids in the
Upper Snake region.
All of the
psyllids tested from previous weeks have been negative for Lso. Samples tested
from last week so far show no evidence of Lso; however, we only have results
from one of the two primers used to test for Lso. Results from the first primer
were all negative, which was sufficient to confirm a negative result in almost all
of our tests during that past ten years. We should have results from the second
primer tomorrow to confirm these results, and we will post another update if
any samples are positive.
We urge growers
to watch psyllid numbers closely during the coming weeks and to have their IPM
programs in place.
Contour maps or
“heat maps” are included on the UI website (see link below). These maps
describe predicted psyllid densities across the landscape, based on our trap
counts and on predictive models developed in collaboration with colleagues at
Washington State University from our many years of data on psyllids in Idaho.
We include just a screenshot of the contour maps on our site, so we encourage
stakeholders to visit the Decision Aid Systems site and create a free account
to view each week’s maps and other pest data in more detail: https://potatoes.decisionaid.systems/
More information
can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the
links under “Updated weekly reports” for details on trap captures.
--Click on the
“Psyllid Management” link on the left panel for information on psyllid and
zebra chip biology and management.
Corn Earworm Counts - 7/28/21
Corn Treasure Valley
corn earworm
Posted on: July 29, 2021 by Jerry Neufeld
Below are the corn earworm
moth counts from this morning, July 28. At
this time counts are still low, except they are rising a little bit in the
Homedale area. I will check the traps
again in a few days to see if the numbers are increasing.
Location | Date | |
23-Jul | 28-Jul | |
South | 2 | 2 |
Melba | 1 | 0 |
Homedale | 4 | 12 |
Wilder | 3 | 3 |
Roswell | 0 | 4 |
Middleton | 2 | 0 |
Total | 12 | 21 |
Corn Earworm Counts - 7/23/21
Corn Treasure Valley
corn earworm
Posted on: July 23, 2021 by Jerry Neufeld
Below are the corn earworm moth counts from this morning, July 23. At this time there doesn’t appear to be a great deal of corn earworm moths around the valley. I will check the traps again in a few days to see if the numbers are increasing.
Location July 23
South on Nampa 2
Melba 1
Homedale 4
Wilder 3
Roswell 0
Middleton 2
Total 12
Psyllid Update July 22, 2021
Potato All Locations
Potato Psyllid
Posted on: July 22, 2021 by Lucy Standley
This week we
had traps deployed in all 73 fields monitored this year. We found a total of
191 psyllids across 31 (42%) of the 73 fields.
Psyllids were
collected on sticky traps in potato in the following counties: Canyon (11
fields), Owyhee (3 fields), Elmore (2 fields), Payette (1 field), Gem (1
field), Gooding (1 field), Jerome (3 fields), Twin Falls (7 fields), Minidoka
(1 field), and Power (1 field).
All of the
psyllids tested from previous weeks have been negative for Lso, though we are
waiting for results from 32 psyllids from six fields that arrived to us late.
We continue to have issues with shipping times being slower than in previous
years.
Psyllid
captures overall ticked up slightly from last week. Contour maps (see links
below) graphically reflect the relatively high abundance of psyllids collected
in some fields in the western Treasure Valley during the past three weeks, as
well as a “hot spot” that has been growing each week in Elmore County. A small
area west of Twin Falls showed relatively high captures this week as well. Very
few psyllids have been detected in the Upper Snake region thus far.
We urge growers
to watch psyllid numbers closely during the coming weeks and to have their IPM
programs in place.
Contour maps or
“heat maps” are included on the UI website (see link below). These maps
describe predicted psyllid densities across the landscape, based on our trap
counts and on predictive models developed in collaboration with colleagues at
Washington State University from our many years of data on psyllids in Idaho. We
include just a screenshot of the contour maps on our site, so we encourage
stakeholders to visit the Decision Aid Systems site and create a free account
to view each week’s maps and other pest data in more detail: https://potatoes.decisionaid.systems/
More information
can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the
links under “Updated weekly reports” for details on trap captures.
--Click on the
“Psyllid Management” link on the left panel for information on psyllid and
zebra chip biology and management.
2021 Miller Research Potato Pest Management Field Day
Potato All Locations
Posted on: July 20, 2021 by Jeff Miller
Miller Research will be holding its annual potato pest
management field day on Thursday, August 19. The event is open to the public
and there is no cost to attend but
please RSVP so we can plan appropriately for the event. This can be
done on our website or by responding to jeff@millerresearch.com or (208)
431-4420. More details can be found by following the attached link.
» https://millerresearch.com/event/2021-miller-research-potato-pest-management-field-day/
Cereal Field Days! Idaho Falls TODAY, Aberdeen Wednesday, Soda Springs Thursday!
Small Grains Eastern Idaho
Cereals Field Days
Posted on: July 20, 2021 by Juliet Marshall
Idaho Falls Tuesday, July 20
4 PM at 2550 South, 45th West (parking at Thiel's residence, not on side of road), followed by Grain Growers dinner @ Sealander Park
Aberdeen / LCS Field Day Wednesday, July 21
8:20 AM registration, program starts at 8:30 AM Aberdeen R&E
Center. 1693 S 2700 W, Aberdeen, ID. Lunch provided.
Soda Springs Thursday, July 22
4 PM Head north on Government Dam Road, take a right on China Hat Road, 1/4 mile on north side of road
» https://www.uidaho.edu/extension/cereals/scseidaho
» UI_Extension_2021_Cereals_Field_Days_For_Southern_Eastern_ID2.pdf
UofI Ag Talk Tuesday 2021
All Crops All Locations
General announcment
Posted on: July 19, 2021 by Kasia Duellman
The next Ag Talk Tuesday session is July 20 at 11 AM.
Registration is required (register one time to access all sessions). Click on this link to register: Registration Link
For more information, please visit the Ag Talk Tuesday website:
http://www.uidaho.edu/ag-talk
This week's featured topics and speakers:
- Federal crop insurance 101 — Ben Thiel, Regional Director, USDA-RMA
- Field projects of cropping systems in eastern Idaho — Xi Liang, Associate Professor, Cropping Systems Agronomy
Psyllid Update July 15, 2021
Potato All Locations
potato psyllid
Posted on: July 15, 2021 by Erik Wenninger
This week we
had traps deployed in all 76 fields monitored this year (though we are waiting
to receive traps from 11 sites). We found a total of 76 psyllids across 18 (28%)
of the 65 fields for which we have data. Several of the fields for which we are
waiting for traps are from fields in and near Canyon County in which we found relatively
high numbers of psyllids last week, thus we would expect these figures to tick
up when these data are added.
Psyllids were
collected on sticky traps in potato in the following counties: Canyon (6
fields), Owyhee (2 fields), Elmore (2 fields), Gooding (1 field), Jerome (2
fields), Twin Falls (5 fields), and Bingham (1 field).
All of the
psyllids tested from previous weeks have been negative for Lso, though we are
waiting for results from two individual psyllids from two fields from last week
(the other psyllids tested from those fields were negative).
Psyllid
captures overall are similar to last week. We urge growers to watch psyllid
numbers closely during the coming weeks and to have their IPM programs in place.
Contour maps or
“heat maps” of this week’s and the previous week’s results are included on the
UI website (see link below). These maps describe predicted psyllid densities
across the landscape, based on our trap counts and on predictive models developed
in collaboration with colleagues at Washington State University from our many
years of data on psyllids in Idaho. The maps graphically reflect the relatively
high abundance of psyllids collected in some fields in the western Treasure
Valley during the past two weeks, as well as a “hot spot” in Elmore County.
Abundance of psyllids remains moderate to low in the Magic Valley and very few
psyllids have been detected in the Upper Snake region.
We include just
a screenshot of the contour maps on our site, so we encourage stakeholders to
visit the Decision Aid Systems site and create a free account to view these and
other data in more detail: https://potatoes.decisionaid.systems/
More information
can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the
links under “Updated weekly reports” for details on trap captures.
--Click on the
“Psyllid Management” link on the left panel for information on psyllid and
zebra chip biology and management.
2021 Peach Twig Borer, Second Generation
General Landscape and Garden Treasure Valley
Peach Twig Borer (Anarsia lineatella)
Posted on: July 15, 2021 by Nic Usabel
The second generation of peach twig borer is beginning egg hatch. Current degree day models indicate 1253 degree days (DD) as of July 14. Second generation cover sprays begin 1200 - 1300 DD. First cover sprays for second generation should be applied now.
To view management control options review the PNW Handbook link below to select an option appropriate for your setting. Apply according to label directions.
Reference Masterials
Pesticide Credits for Recertification - August 2021
All Crops All Locations
Posted on: July 13, 2021 by Kimberly Tate
The University of Idaho (UI) Extension Pesticide Safety Education Program is offering online webinars for pesticide recertification credit via Zoom video conferencing.
Tuesday, Aug. 3 at 10 AM MDT – Daniel Sandoval, Idaho State Department of Agriculture (ISDA) Pesticide Training Specialist: New ISDA Pesticide and Chemigation Rules
Tuesday, Aug. 17 at 10 AM MDT – Brad Stokes, UI Extension Educator Elmore County: Toxicity and Non-Target Effects of Pesticides to Idaho Pollinators and Beneficial Insects
Each webinar is $10 per applicator. Completed webinars receive one pesticide credit and great information! Note: Enrollment will close 8 AM (Mountain Time) on the day of the webinar.
How to enroll for the webinar(s):
1. Visit our website: https://www.uidaho.edu/extension/ipm.
2. Be prepared to provide your email and applicator license number.
Note: From cals-ipm@uidaho.edu we will send instructions on how to access Zoom (no camera or account required).
For questions or comments, contact Kimberly Tate, UI Extension at ktate@uidaho.edu or (208) 364-4581.
Corn Earworm - 2021
Corn Treasure Valley
corn earworm
Posted on: July 12, 2021 by Jerry Neufeld
I am once again
collaborating with Charter Seed Co. and Crookham Co. on a project to trap corn
earworm moths. Traps will be set out in
corn fields at various locations near Melba, Middleton, Wilder, Homedale, and
Caldwell. I will check the traps every
few days and post the moth counts to this website.
The online Phenology and
Degree Day Model (GDD) from Oregon State University is being used to estimate
when the summer generation of corn earworm moths will emerge. This is the generation of moths that lay eggs
in corn that is silking at the time when they emerge. The link to the GDD calculator for Corn
Earworm is below.
The GDD model uses January
1 as a biofix, 55 and 92 as the temperature parameters. Summer
moths will emerge after 1300 GDD have accumulated. 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 Caldwell area about July 12, and will reach 1300 GDD in
the Parma area about July 15. This is 10
to 14 days earlier than last year. Egg
laying in most, if not all, Treasure Valley locations will take place in this approximate
time frame. Larval feeding will begin 3
to 4 days after egg hatch.
Traps will go out soon. 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 use the growing degree day model and also
view various treatment methods based on the type of corn that you are growing.
» https://uspest.org/cgi-bin/ddmodel.us
» https://pnwhandbooks.org/insect/vegetable-seed/corn/corn-seed-corn-earworm-sweet-corn-only
» https://pnwhandbooks.org/insect/vegetable/vegetable-pests/hosts-pests/corn-sweet-corn-earworm
» https://pnwhandbooks.org/insect/agronomic/field-silage-corn/field-silage-corn-corn-earworm
Upcoming Cereal Field Days - Rupert / Minidoka
Small Grains All Locations
Cereals Field Days
Posted on: July 11, 2021 by Juliet Marshall
Upcoming field day this week - Rupert Minidoka!
9:00 AM
Thursday, July 15th
Starting at Winter trials: intersection of 400 E and 900 N. Spring trials: 2 miles east of winter plots on 600 E, 900 N
Hope to see you there!
Cheers,
Juliet
» https://www.uidaho.edu/extension/cereals/scseidaho
» UI_Extension_2021_Cereals_Field_Days_For_Southern_Eastern_ID2.pdf
Psyllid Update July 8, 2021
Potato All Locations
Potato Psyllid
Posted on: July 8, 2021 by Lucy Standley
This week we
had traps deployed in 73 of the 76 fields (96%) monitored this year and we
found a total of 139 psyllids across 30 (41%) of the 73 fields. We are waiting
to receive cards from 9 more sites.
Psyllids were
collected on sticky traps in potato in the following counties: Payette (1
field), Canyon (12 fields), Gem (1 field), Owyhee (3 fields), Elmore (2
fields), Gooding (1 field), Jerome (2 fields), Twin Falls (5 fields), Minidoka
(2 fields), and Power (1 field).
Lso results are
still pending due to shipping delays, but results will be posted on our site
(below) once results are in.
Thus far,
psyllid captures are tending to be a bit higher than they were at this time the
last two years. We urge growers to watch psyllid numbers closely during the
coming weeks and to have their IPM programs in place.
More information
can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the
links under “Updated weekly reports” for details on trap captures.
--Click on the
“Psyllid Management” link on the left panel for information on psyllid and
zebra chip biology and management.
Powdery Mildew in Sugarbeets - 2021
Sugarbeets All Locations
Powdery Mildew
Posted on: July 2, 2021 by Jerry Neufeld
Powdery mildew has been found by
The Amalgamated Sugar Company LLC Crop Consultants in sugarbeet fields in the Nyssa, OR area near the
Snake River. There are several
fungicides available for use to treat powdery mildew. Depending on the disease
pressure and chemistry used, applications with different chemistries should be
repeated every 14-21 days. Please be advised that strobilurins could show reduced efficacy due to fungicide
resistance. Always tankmix with at least 5 lbs of sulfur for resistance
management purposes. Contact your Crop Consultant from The
Amalgamated Sugar Company LLC if you have any
questions.
Click on
the link below for the powdery mildew pages in the PNW Plant Disease Management
Handbooks.
» https://pnwhandbooks.org/plantdisease/host-disease/sugar-beet-beta-vulgaris-powdery-mildew
2021 Potato psyllid monitoring program in Idaho
Potato All Locations
potato psyllid
Posted on: July 2, 2021 by Erik Wenninger
The University
of Idaho and our crop consultant collaborators across the state are once again monitoring
for potato psyllids, zebra chip disease (ZC), and liberibacter (Lso), the
bacterium associated with ZC. The monitoring program covers commercial potato
fields throughout southern Idaho and is funded in part by the Idaho Potato
Commission and generous in-kind contributions by our cooperators.
Our official monitoring
season began with wide deployment of traps this week and will continue for 10
to 12 weeks. We should have about 76 fields across the state this year, using 4
sticky traps per field at all sites.
In early to mid-June
we began monitoring in three fields at the Kimberly R&E Center (KREC) and in
eight commercial fields in the Treasure Valley (mostly in Canyon County). On
traps retrieved during the weeks of June 14, 21, and 28, we captured a total of
1, 4, and 8 potato psyllids, respectively, among our fields at KREC. Among seven
of the eight fields in the Treasure Valley, we captured an average of about 2
psyllids per field during each of the last two weeks; however, in one Canyon
County field, we captured 19 psyllids this week.
All psyllids
tested so far from the previous weeks have been negative for Lso. We expect to
have more Lso results next week.
More details and
additional information can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the
links under “Updated weekly reports” on the right for details on trap captures.
--Click on the
“Psyllid Management” link on the left panel for information on psyllid and
zebra chip biology and management.
2021 Apple Codling Moth, Second Generation
General Landscape and Garden Treasure Valley
Codling Moth Cydia pomonella
Posted on: July 2, 2021 by Nic Usabel
The second generation of codling moth will begin egg hatch this weekend. Current trap biofix degree day models indicate 1069 DD as of July 1. Beginning egg hatch begins at 1120 DD, currently forecasted to be met by July 3.
Rotate among insecticide classes between generations to prevent development of insecticide resistance. Reference publication links to view insecticide options for commercial or residential sites. Commercial products with the active ingredients including; spinetoram, acetamiprid, chlorantraniliprole, etc. Residential products with active ingredients including; lambda-cyhalothrin (restricted use pesticide), or esfenvalerate and Spinosad (general-use pesticides). Non-spray option is to bag the fruit.
This pest needs prevention all season long for clean fruit.
Reference Materials:
- PNW Management Handbook: Codling Moth
- Codling Moth, Utah State University
- Codling Moth, Colorado State University
INSECT PHOTOS NEEDED
All Crops All Locations
Posted on: July 2, 2021 by Jerry Neufeld
As a
component of a USDA-funded project, Harnessing
artificial intelligence for implementing integrated pest management in
small-grain production systems, the University of Idaho is
developing a system to automatically
identify insects in wheat and other crops based on submitted cellphone images.
To develop this system, we
need your help with collecting a large number of
photographs of pests and beneficial insects observed in cereal cropping systems
(cereals and rotation crops) throughout the region. We will use these photos
(hopefully thousands) to train our computer algorithm to enable the system to
generate the most accurate identifications of unknown samples.
To help
us develop this tool, please upload insect photographs through this link: https://cerealpestaid.net/
2021 Squash Bug
General Landscape and Garden Treasure Valley
Squash Bug (Anasa tristis)
Posted on: June 30, 2021 by Nic Usabel
Squash bugs have been reported in Canyon County by an Idaho Master Gardener. It is time to check the underside of cucurbit (pumpkins and squash are the most attractive) leaves for the bronze-colored egg clusters. In addition, monitor plants for nymphs, adults and plants wilting.
Management:
Wooden boards, shingles, or heavy cardboard can be placed on the ground next to the host plant. Squash bugs tend to move under the board/object at night. In the morning, turn the object over and destroy the pest.
Hand-pick and destroy adults, nymphs, or egg clusters. Other options include rolled duct tape around fingers to pull off egg clusters, cutting off the egg part of the leaf or applying petroleum jelly directly to the eggs. Increased success is achieved when started early in the season and done every 2 to 3 days to keep numbers low.
Cultural methods include sanitation, plating squash varieties that are more tolerant of squash bug feeding, crop rotation, and time of planting.
Additional control methods can be found in the linked publications.
Reference Materials:
- PNW Management Handbook: Squash Bug
2021 Peachtree Borer
General Landscape and Garden Treasure Valley
Peachtree Borer (Synanthedon exitiosa)
Posted on: June 23, 2021 by Nic Usabel
The peachtree borer Degree Day (DD) model indicates that now is the time to begin management. This pest is a concern for stone fruits: Peach, nectarine, apricot, cherry, and plum. Key symptoms of peachtree borer infestation include the presence of sawdust and frass mixed with the gummy substance near the base of the trunk. Prevention is the best method of control.
Larvae injure the fruit tree primarily by burrowing into the tree trunks just at or below the soil line but may enter trunk up to 12” above the soil line. Larvae feed in the cambium beneath the bark girdling the tree.
Chemical Control, Home Use:
For orchards less than 1 acre, or for home yard trees, preventative trunk sprays are the primary control. Apply the first application immediately after first trap catch (or based on DD) and repeat application based on product label guidelines. Follow the required pre-harvest interval (time between last application and allowed harvest of fruit) of insecticide product. Apply insecticide as a bark drench at a rate of ½ to 1 gallon of spray mix per tree. Thoroughly cover the lower 12 inches of trunk and soak the ground at the base of tree. Do not allow the sprays to contact fruit. For chemical options review the PNW handbook.
Chemical Control, Commercial:
Reference the PNW handbook to review application recommendations.
Cultural Management Control:
Larvae inside the trunks can be killed by inserting a wire into entry holes. Kill larvae in the late summer and fall before they spend the winter and inflict their most extensive feeding damage the following spring. Keep base of tree free of vegetation – heat and dryness reduce the survival of eggs and larvae.
Reference Materials:
- PNW Management Handbook: Peach and Nectarine - Peachtree Borer (previously linked above)
- Greater Peachtree Borer, Utah State University
- Peachtree Borer, Colorado State
» https://pnwhandbooks.org/insect/tree-fruit/peach-nectarine/peach-nectarine-peachtree-borer
» https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1651&context=extension_curall
» https://extension.colostate.edu/topic-areas/insects/peach-tree-borer-5-566/
2021 Turfgrass Mowing Height & Watering
General Landscape and Garden Treasure Valley
Posted on: June 22, 2021 by Nic Usabel
The weather in the Treasure Valley is warming quickly!
MOWING
Now is the time to check the mowing height at which your turfgrass is cut. Increasing the length of grass blade encourages a deeper root growth and provides more shade cover of the soil surface reducing water evaporation.
For summer mowing height Kentucky bluegrass and fine fescue are recommended to be maintained at 3 inches, perennial ryegrass at 2 inches, and tall fescue at 4 inches. Ensure that the mower blade is sharp and follow the one-third rule; remove no more than one-third of the leaf growth each mowing.
Grass clipping which are left on the lawn by mulching decompose quickly, feed soil organisms, recycle plant nutrients, and increase organic matter in the soil.
WATERING
The goal of irrigation is to keep the lawn healthy when rainfall is not dependable. The key is to moisten the top 10 inches to 12 inches of the root zone. Watering deeply (10 to 12 inches) but infrequently produces healthy turf. Practicing deep watering reduces weed populations, benefits landscape trees and shrubs, increases water use efficiency, and forces an exchange of soil atmosphere with each irrigation. Early morning is the best time to water.
Determining how deep irrigation water goes can be done by using a soil probe or shovel to check soil moisture the day after irrigation. At 10 to 12 inches deep the soil should feel slightly damp. If the soil feels dry at the 10- to 12-inch depth increase the duration of water application to fill the root zone. As weather conditions change this fall adjust the frequency of irrigation to maintain plant available water in the root zone. Frequency of irrigation refers to the number of days between each water application.
Identifying or knowing soil type will help to determine the frequency of water application, rate of water infiltration, and the soils water holding capacity. For example, heavy clay soils have a greater water holding capacity, but have a slower infiltration rate (speed at which water enters the soil). These soils can be watered less frequently and may need multiple application of water on day of watering to allow water to move into the soil. Sandy soils have less water holding capacity and a greater infiltration rate. These soils need to be watered more frequently to maintain comparable turf.
For a more calculated approach to water application reference the publication links below.
- Watering Home Lawns: How Much and How Often
- Watering Home Lawns & Landscapes
- Idaho Landscapes & Garden Website: Lawn & Turf
» https://www.extension.uidaho.edu/publishing/pdf/CIS/CIS1157.pdf
» https://www.extension.uidaho.edu/publishing/pdf/CIS/CIS1098.pdf
CANCELLED! The July 8th Snake River Weed Control Tour
All Crops All Locations
Posted on: June 22, 2021 by Pamela Hutchinson
The 2021 Snake River Weed Control Tour July 8th at the University of Idaho Aberdeen R&E Center has been cancelled. We hope to see you next year!
July 8th UI Snake River Weed Mgt Tour - Aberdeen R&E Center
All Crops All Locations
Posted on: June 15, 2021 by Pamela Hutchinson
2021 UI Snake River Weed Management Tour – Potatoes and Specialty Crops
Aberdeen R&E Center, Thursday July 8th
Registration begins at 8:30 am
Tour 9a to 12:30p
• Herbicide Tank Mixes for Weed Control in Potatoes.
• Chateau – Fierce – Mauler.
• Anthem Flex Tank Mixtures,
• Sonalan Tank Mixtures for Weed Control in Potatoes.
• Potato Variety Tolerance to Sulfentrazone.
• Potato Variety Tolerance Trials.
• Excess Rainfall Effect on Herbicides and Potato injury.
• Quinoa herbicide screening.
• Litchi tomato herbicide management.
• Herbicide Mechanism of Action Demonstration Plots.
Pest Management Updates and Information:
• Albert Adjesiwor, Weed Scientist, Kimberly R&E Center
Three Idaho Pesticide Applicator Credits will be offered.
For more information contact Pamela J.S. Hutchinson phutch@uidaho.edu 208-681-1304
