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Coddling Moth 2018
Apple Treasure Valley
Posted on: May 21, 2018 by Dian Roberson
Coddling Moth has been detected in traps so it is time to take action! This is a small moth that lays eggs on the blossom end of Apple and Pear fruit. The larvae them bore into and ruin your fruit. Check out the publications and links below to help you choose the best control for your landscape.
» http://extension.colostate.edu/topic-areas/insects/codling-moth-control-in-home-plantings-5-613/
» https://pnwhandbooks.org/insect/tree-fruit/apple/apple-codling-moth
Fire Blight Confirmed
Apple All Locations
Erwinia Amylavora
Posted on: May 18, 2018 by Rich Guggenheim
Fire Blight has been confirmed in Canyon County. This bacterial infection can attack anything in the rose family (Rosaceae). It is especially destructive to apples (Malus spp.), pears (Pyrus spp.), and crabapples (Malus spp.). There is no cure for fire blight. Prevention is the best solution. Purchase resistant varieties, minimize rapid growth and succulent tissue, prune out blighted twigs and cankered branches. Check out the publications and websites below for more information.
http://treefruit.wsu.edu/crop-protection/disease-management/fire-blight/
https://masters.agron.iastate.edu/redirect/514/lesson04/FireBlight.html
http://extension.colostate.edu/docs/pubs/garden/02907.pdf
» https://pnwhandbooks.org/plantdisease/host-disease/apple-malus-spp-fire-blight
» http://pnwpestalert.net/uploads/fire_blight.pdf
Pear Blister Mite
Tree Fruits All Locations
Eriophyes pyri
Posted on: May 9, 2018 by Rich Guggenheim
Pear leaf blister mite, Eriophyes (=Phytoptus) pyri , is an eriophyid mite found on pear, and apple. Young trees can be damaged by severe infestations.
CONTROL:
Treat large infestations in early fall, before leaf drop, when mites are migrating from leaves to buds. Options include carbaryl, horticultural oil, or lime sulfur. Dormant oil applications in spring are also effective. Blister mites cannot be treated in summer.
» http://ipm.ucanr.edu/PMG/r603400511.html
» http://oregonstate.edu/dept/nurspest/pear_leaf_blister_mite.htm
» https://utahpests.usu.edu/ipm/agricultural/fruit/blister-mites
Peach Leaf Curl
Tree Fruits All Locations
Peach Leaf Curl
Posted on: May 8, 2018 by Rich Guggenheim
Taphrina deformans
Peach leaf curl is affecting peach leaves now. Proper timing of fungicides, in the fall, can prevent this disease aLime sulfur or Ziram work great for commercial growers. Home grown trees will need something but avoid Monterey Liqui-Cop as it did not work. Ortho MAX Garden Disease Control was a little better than nothing. Bottom line for home growing - replace with a resistant tree after the current ones dies.
» https://pnwhandbooks.org/plantdisease/host-disease/peach-prunus-persica-leaf-curl
» http://ipm.ucanr.edu/PMG/PESTNOTES/pn7426.html
» https://extension.usu.edu/files/publications/factsheet/peach-leafcurl.pdf
» http://extension.oregonstate.edu/gardening/node/924
lygus bug in alfalfa seed, 2018
All Crops All Locations
lygus bug
Posted on: May 7, 2018 by Jerry Neufeld
The Lygus degree day calculator hosted by Integrated Plant Protection Center at Oregon State University and the IPM Centers - PNW Coalition shows that, depending on your location in the Treasure Valley, we have accumulated 280 to 290 degree days between January 1, 2018 and May 7, 2018. As you move west in the Treasure Valley the growing degree days increase. This is a few days ahead of 2017 and a few days ahead of the 30-year average; once again, this varies depending on your location. Peak emergence of lygus bug 1st and 2nd instar nymphs occurs right around 272 accumulated degree days; this should be about right now, and is the time monitoring for lygus bugs in alfalfa seed fields should begin.
When using most insecticides, fields should be treated when numbers of lygus bugs reach 4-5 lygus bug nymphs per 180 degree sweep. Growers using Assail, or Beleaf, as stand-alone sprays probably should treat before or just as 4th instar nymphs are detected.
sugarbeet root maggot, 2018
Sugarbeets Treasure Valley
sugarbeet root maggot
Posted on: May 7, 2018 by Jerry Neufeld
The degree day calculator (hosted by the Integrated Plant Protection Center at Oregon State University; http://uspest.org/cgi-bin/ddmodel.us) for the sugar beet root maggot fly shows that—depending on your location in the Treasure Valley—we have accumulated 360 growing degree days since January 1, 2018. Peak flight of root maggot flies should occur after 360 accumulated growing degree days when the maximum high temperature exceeds 80 degrees F. In the Treasure Valley this should be this week.
Root maggot flies will lay eggs near sugarbeet plants. After the larvae hatch they will begin feeding on the young sugarbeets. Look for these pests to appear in the western end of the Treasure Valley first. If you haven’t applied a treatment for sugarbeet root maggot, now is the time to do so. The link below from the 2018 PNW Insect Management handbook contains additional information. Visit with your field consultant from AMSCO for treatment options.
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-sugar-beet-root-maggot
Hail damage to onions
Onion Treasure Valley
Hail Damage
Posted on: May 7, 2018 by Stuart Reitz
A strong thunderstorm with high winds and hail crossed through parts of the valley Sunday evening. According to the National Weather Service, it went from Nyssa to the Fruitland and Payette areas.
If your onions were damaged in the storm, remember that the plants will benefit from a protective bactericide/fungicide application. Hail can create small and large wounds that leave plants extremely vulnerable to diseases.
As soon as you can get on the field, apply a copper containing protectant spray. Copper protects against bacterial and fungal diseases so it is a better option than fungicides that do not contain copper. This will help prevent infections while those wounds heal. The sooner after any damage occurs, the better.
Peach Tree Borer
Tree Fruits All Locations
Synanthedon exitiosa
Posted on: May 4, 2018 by Rich Guggenheim
Peach tree borer are in the clear wing moth category. They usually attack prunus trees near the ground. Signs of infestation include gumosis oozing from the trunk near the soil.
Peachtree borer eggs are laid during the summer on the bark at the base of trees. Larvae overwinter in the tree trunk near the soil line. They feed in the crown area and burrow up into the tree
» https://pestadvisories.usu.edu/2017/04/18/gummosis/
» http://extension.colostate.edu/topic-areas/agriculture/cytospora-canker-in-tree-fruit-crops-2-953/
Free Pesticide Disposal
All Crops All Locations
Posted on: April 30, 2018 by Jerry Neufeld
The Idaho State Department of Agriculture is conducting free pesticide disposals in four locations during May. Click on the pdf below for more information.
Onion thrips in Volunteer Onions
All Crops All Locations
Posted on: April 27, 2018 by Stuart Reitz
Onion thrips are starting to show up in greater numbers (both adults and immatures) on volunteer onions and other weeds. Volunteer onions serve as a host for both onion thrips and Iris Yellow Spot Virus. After a slight cool down, temperatures will be back in the 80s by the middle of next week - ideal conditions for development of thrips populations and their movement into current season onion fields.
If you have onion fields you would like included in our onion monitoring project, please contact stuart.reitz@oregonstate.edu / 541-881-1417.
Survey on Alfalfa Thrips
All Crops All Locations
Posted on: April 26, 2018 by Jason Thomas
Insect pests come and go in crops as conditions change. To learn more about the current state of thrips, a small insect that can occur in alfalfa the University of Idaho Extension service is conducting a survey about these insects. We encourage all those who work with alfalfa, including consultants to take this 3-minute survey. To thank you for your time, you will be entered into a raffle to win one of four $25 Amazon Gift Cards. Please share this with as many other farmers and consultants who work with alfalfa as possible so we can learn more about these pests.
» https://uidaho.co1.qualtrics.com/jfe/form/SV_bK1iz26kvhsmfE9
2018 Spring Garden Festival.
Announcements All Locations
2018 Spring Garden Festival. Credits available!
Posted on: April 16, 2018 by Rich Guggenheim
The University of Idaho Extension Master Gardener Volunteers are hosting their 2018 Spring Garden Festival. Happening on April 21st from 9-4 at the UI Extension Office located at 501 Main St in Caldwell, this all day event will feature 4 tracks of concurrent courses.
Cost $30.
The pesticide track will offer ISDA recertification credits.
The arboriculture track will offer ISA credits for certified arborists.
The JMG track offers professional development for teachers.
And there is a gardening 10 track for those who simply want to explore the basics.
Whether you are a beginner or an expert, this event has something to help everyone grow! There is also a free plant sale featuring plants grown by Master Gardener volunteers!
For more information, and to register, call 208-459-6003.
Potato Virus Detection Training Workshops
Potato All Locations
Posted on: April 16, 2018 by Nora Olsen
Due to the success of our Potato Virus Detection Training Workshop at Othello WA in 2016, we are hosting another set of workshops in 2018 at three locations: Othello WA, Antigo WI and Presque Isle ME. These workshops will cover field identification of PVY (strains O, N-Wi and NTN), including visual identification of foliar symptoms on 20 cultivars commonly grown in each region. Recent standardization of seed certification programs across the U.S. includes the requirement for documentation of inspector training. However, this training will also be beneficial to growers, people who rogue, and those in the potato industry in general. We expect a high attendance rate so please sign up early! Locations, dates and times are listed below. Additional details can be found on our registration page Potato Virus Detection Training Workshop Registration.
Othello, WA
Date/Time: Thursday June 21, 2018. This workshop will be integrated into the Washington State University Potato Field Day, 8:30 a.m. to 1 p.m.
Location: Washington State University Research Farm, 1471 West Cox Road, Othello, WA
You are also invited to these events held nearby:
• Tuesday June 19, Final WA Commercial Potato Seed Lot Reading for 2018, 1471 West Cox Road, Othello, WA, 8:30 a.m. to 2:30 p.m.
• Wednesday June 20, Oregon State University Potato Field Day, OSU Research and Extension Center, 2121 South 1st Street, Hermiston, OR
Antigo, WI
Date/Time: Thursday July 26, 2018, 9:30 to 11:30 a.m. in advance of the Langlade Ag Research Station County Field Day, 1 to 3:30 p.m.
Location: University of Wisconsin Langlade Agricultural Research Station, Langlade County Airport, N3689 Langlade Road, Antigo, WI
Presque Isle, ME
Date/Time: Tuesday July 10, 2018, 10 a.m. to 12 p.m. for inspectors and 2 to 4 p.m. for growers and field staff, with a rain date on Thursday July 12.
Location: University of Maine Aroostook Farm, 59 Houlton Road, US Route 1, Presque Isle, Maine
University and USDA experts will be available at each location to give you a tour and answer your questions. These workshops are part of a USDA NIFA Specialty Crops Initiative award #2014-51181-22373 titled “Biological and economic impacts of emerging potato tuber necrotic viruses and the development of comprehensive and sustainable management practices”.
To register for the event please visit Potato Virus Detection Training Workshop Registration.
For more information about the workshop please email pbg-potatovirus@cornell.edu.
Growing a great lawn! Free workshop!!!
Landscape and Garden All Locations
Green lawns!
Posted on: April 11, 2018 by Rich Guggenheim
Growing a GREAT Lawn is a free workshop being held from 9-12 at Nampa's Lakeview Park on April 14th from 10-12. Register online at the Nampa Parks and Rec website. This workshop will be taught by University of Idaho Extension horticulture professor and state Master Gardener Coordinator, Rich Guggenheim. You will learn how to grow a healthy, green lawn while cutting the need for fertilizer, pesticides, and reducing your water consumption.
Call 468-5890 for more info.
Billbugs/Lawn grub proper treatment protocols.
Landscape and Garden All Locations
Lawn Grubs
Posted on: April 10, 2018 by Rich Guggenheim
Billbugs (Sphenophorus spp) can be a problem in lawns planted with Kentucky Bluegrass (KGB). Proper timing of pesticide applications is *critical* for controlling this pest! The most common type of lawn grub found in the Treasure Valley is the Denver Billbug, although in some areas of Boise there is the Japanese Beetle, which is of special concern. Proper identification of grubs is important so that proper treatment may be applied. Management using chemical pesticides need to coincide with certain life cycles of the insect in order to be effective. You may bring a sample of the grub or adult to your local University of Extension office where they may be identified and you may obtain information on proper management of this pest. Properly fertilizing, watering, and mowing of your turf can eliminate the need to apply chemicals to your lawn to control grubs.
» http://extension.uidaho.edu/clearwater/files/2014/10/Controlling-Billbug-Grubs-in-Lawns.pdf
» https://utahpests.usu.edu/uppdl/files-ou/factsheet/Billbugs.pdf
» http://extension.colostate.edu/topic-areas/insects/billbugs-and-white-grubs-5-516/
Pear psylla
Tree Fruits All Locations
Cacopsylla pyricola
Posted on: April 7, 2018 by Rich Guggenheim
Pear psylla is one of the most serious insect pest of pears because of its ability to develop resistance to insecticides and to vector the pathogen that causes pear decline.
Adults hold their transparent wings rooflike over their dark to reddish brown bodies when at rest; they resemble tiny cicadas. A dark spot on the top middle edge of both wings helps to distinguish pear psylla from other psylla. Tiny, elongated yellowish eggs, which are barely visible without a hand lens, are laid on or near fruit spurs starting in late January or early February.
Pesticides applied to pears greatly reduce the effectiveness of natural enemies. Soft pesticide programs that spare natural enemies would reduce the need for chemical control of pear psylla and other pear pests.
» http://jenny.tfrec.wsu.edu/opm/displaySpecies.php?pn=120
» http://ipm.ucanr.edu/PMG/r603301111.html
» https://extension.usu.edu/juab/ou-files/PearPsyllaCacopsyllaPyricola.pdf
» https://blogs.cornell.edu/jentsch/2015/08/06/pear-psylla-late-season-management-options/
White apple leafhopper
Tree Fruits All Locations
Homoptera: Cicadellidae
Posted on: April 7, 2018 by Rich Guggenheim
The overwintering eggs begin hatching at about the tight cluster stage of apple development, with peak hatch during or after bloom. There are five nymphal instars. It takes about 27 days for nymphs of the first generation to develop and 23 days for second generation nymphs.
» http://jenny.tfrec.wsu.edu/opm/displayspecies.php?pn=360
» https://utahpests.usu.edu/uppdl/files-ou/factsheet/white-apple-leafhoppers97.pdf
» http://ipm.ucanr.edu/PMG/r4301811.html
» https://pnwhandbooks.org/insect/tree-fruit/apple/apple-leafhopper
Fruit Orchard Leaf Rollers.
Tree Fruits All Locations
Fruit Tree Leaf Rollers
Posted on: April 7, 2018 by Rich Guggenheim
Various types of leaf rollers may cause damage to fruit trees. Begin using traps to monitor and establish bio-fix and management timing.
» https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=2794&context=extension_curall
Peach Twig Borer -Anarsia lineatella
Tree Fruits All Locations
Peach Twig Borer
Posted on: April 6, 2018 by Rich Guggenheim
Peach twig borer can damage stone fruits by feeding in shoots and causing shoot strikes, or by feeding directly on the fruit. Shoot damage is most severe on the vigorous growth of young, developing trees because feeding kills the terminal growth and can result in undesirable lateral branching. As fruit matures, it becomes highly susceptible to attack; damage is most likely to occur from color break to harvest. Twig borer larvae generally enter fruit at the stem end or along the suture and usually feed just under the skin.
Adults from the overwintered generation usually begin emerging in April or early May. First generation larvae usually develop in twigs during May and June and give rise to the next flight of moths in late June or early July. Larvae from this and subsequent generations may attack either twigs or fruit depending on fruit maturity and population density.
» http://jenny.tfrec.wsu.edu/opm/displaySpecies.php?pn=90
» http://ipm.ucanr.edu/PMG/r602300611.html
» https://utahpests.usu.edu/slideshows/ppt/05sh-insects-ptbcontrol.pdf
Coryneum Blight
Tree Fruits All Locations
Coryneum blight/shothole disease
Posted on: April 6, 2018 by Rich Guggenheim
Environmental conditions are favorable for the development of Coyneum blight on prunus spp. the fungal pathogen, Wilsonmyces carpophhilus attacks peach, apricot, plum, and cherry. Early season infections are characterized by the presence of a reddish-purple halo surrounding a light tan, scab-like center spot, which is the dead fruit skin killed by the fungus. These are similar to damage caused by San Jose Scale, and great care is required to avoid confusion. Depending on weather factors, the spots may remain tiny or enlarge to 1/4 inch in diameter. In severe cases, lesions coalesce and cause skin cracking. Severe, early season infections also can have gummy ooze on the fruit surface.
Management includes cleaning and removal of infected plant material. Fungicides can be used, but are preventalitive and not curative and may be applied at schuck fall. Commercial growers may need to apply at regular intervals during wet weather.
» https://utahpests.usu.edu/ipm/agricultural/fruit/coryneum-blight
» http://extension.colostate.edu/topic-areas/agriculture/coryneum-blight-2-914/
» http://ipm.ucanr.edu/PMG/GARDEN/FRUIT/DISEASE/shothole.html
Environmental Conditions Favor Fire Blight Development
Apple All Locations
Erwinia amylovora.
Posted on: April 6, 2018 by Rich Guggenheim
Current environmental conditions favor the development of Fire Blight in apple and related family of trees such as pyracantha, hawthorn, and cotoneaster. This disease does not affect stone fruit such as cherries, plum, apricot, or peach.
Management is best controlled by puning out diseased plant parts. Bordeaux mixture, Streptomycin, and copper sprays are also used to manage this bacterial disease.
» http://extension.usu.edu/files/factsheets/Disease%20027%20UPDC%20Fire%20blight.PDF
» http://treefruit.wsu.edu/crop-protection/disease-management/fire-blight/
» http://extension.colostate.edu/topic-areas/yard-garden/fire-blight-2-907/
Boxelder bugs
Landscape and Garden All Locations
Box Elder Bugs
Posted on: March 30, 2018 by Rich Guggenheim
Boxelder bugs are active. Management is extremely difficult. Management techniques include:
Exclusion- sealing cracks and around windows, doors, and other entry points.
Eradication of female box elder trees.
Vacuuming- cleaning up the bugs with a shop vac.
Diatomaceous earth can create an effective barrier along with certain contact insecticides. However, repeated insecticide applications have been shown to quickly create resistance and will dramatically reduce natural enemies. Therefore, insecticides should not be used unless necessary to prevent substantial fruit damage. Always read and follow all label instructions.
» https://www.cals.uidaho.edu/edcomm/pdf/CIS/CIS1208.pdf
» http://oregonstate.edu/dept/kbrec/boxelder-bug
» http://www.extension.uidaho.edu/publishing/pdf/CIS/CIS1208-S.pdf
Allium (Onion) Leaf Miner
Onion Treasure Valley
Allium Leaf Miner
Posted on: March 27, 2018 by Jerry Neufeld
Allium Leaf Miner, or Onion Leaf Miner is one of the worst onion pests in Europe. It is currently found in several counties in New Jersey and Pennsylvania. This pest was recently deregulated by USDA-APHIS, meaning it will not be stopped when found at port inspections, thereby posing a threat to other onion producing areas in the U.S. Click on the link below for more information about this pest from the Oregon Department of Agriculture.
» http://www.oregon.gov/ODA/shared/Documents/Publications/IPPM/AlliumLeafminerPestAlert.pdf
Clover mites
Landscape and Garden All Locations
Mites
Posted on: March 20, 2018 by Rich Guggenheim
Spider and clover mites have been confirmed in landscapes throughout Canyon County. They are especially problematic on the south and west facing yards where temperatures are warmer and drier. They can invade homes, where they become a nuisance. Control can be obtained with diatomaceous earth as a barrier. Do not use insecticides to control mites. Always read and follow label instructions.
» http://extension.colostate.edu/docs/pubs/insect/05505.pdf
» https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1877&context=extension_curall
» https://www.extension.umn.edu/garden/insects/find/clover-mites/
» https://www.unce.unr.edu/publications/files/ho/other/fs9605.pdf
Cull Onion Disposal in Idaho- 2018
All Crops All Locations
cull onions
Posted on: March 13, 2018 by Jerry Neufeld
The deadline to dispose of cull onions in Idaho is March 15. The pdf file below from Idaho State Department of Agriculture contains more information about cull onion disposal.
