Landscape & Garden Alerts
Showing 25 most recent Landscape and Garden alerts
Swipe Left or Right to navigate Alerts
New strain of Tomato Late Blight detected in Idaho.
Landscape and Garden All Locations
Late Blight in Tomatoes.
Posted on: May 25, 2016 by Rich Guggenheim
Late blight in tomatoes will likely be seen again this year in Idaho. There is a new highly infectious strain in Idaho this year, US23 which is pathogenic both to tomatoes and potatoes, and some research suggests even petunias.
Application of fungicides in the home garden are preventative only and not curative. Best management practices include avoiding water on leaves of plants and removing infected plants which may spread the disease.
Some varieties are resistant to late blight.
For more information, contact your local County Extension Office!
» http://www.ipm.ucdavis.edu/PMG/r783100211.html
» http://extension.oregonstate.edu/gardening/be-lookout-symptoms-tomato-late-blight
» https://extension.umaine.edu/publications/2427e/
» http://www.plantpath.wisc.edu/wivegdis/pdf/2015/Organic%20late%20blight%20control%202015.pdf
Paul Castrovillo "First 2016 Western Cherry Fruit Flies Captured in ISDA Monitor Trap"
All Crops All Locations
Western Cherry Fruit Fly
Posted on: May 20, 2016 by Rich Guggenheim
Now is the time to begin treatment for WCFF.
Four specimens of Western Cherry Fruit Fly (Rhagoletis indifferens) were found in an Idaho State Department of Agriculture WCFF survey trap in Canyon County that was checked on May 16. These were the first specimens captured in 2016. Our traps in Gem County, checked the same day, contained no WCFF, however, historically we expect to find them there about a week after the initial catch in Canyon County.
Please check with your local county extension educator or crop consultant for the situation in your area and for proper chemical recommendations and application methods if necessary.
» http://jenny.tfrec.wsu.edu/opm/displaySpecies.php?pn=150
» http://wci.colostate.edu/Assets/pdf/western.cherry.fruit.fly.pdf
» https://extension.usu.edu/files/publications/factsheet/western-cherry-fruit-flies06.pdf
Fire Blight on Apple and Pear Trees
Tree Fruits All Locations
Fire Blight
Posted on: May 18, 2016 by Dian Roberson
We are seeing a lot of fire blight on pears come into the Canyon County Extension Office! Fire blight is a bacterial disease that affects certain species in the rose family (Rosaceae). It is especially destructive to apples (Malus spp.), pears (Pyrus spp.), and crabapples (Malus spp.). It likes warm wet springs like the one we had this year. 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://pnwhandbooks.org/plantdisease/pear-pyrus-spp-fire-blight
Codling Moth at 310 Degree Days
Landscape and Garden Treasure Valley
Codling Moth
Posted on: May 2, 2016 by Rich Guggenheim
Codling Moth Degree Days have reached 310 DD
The peak egg hatch period has begun. Chemical sprays loose effectiveness quickly on expanding fruits . It is important that your fruit is protected with insecticide to prevent larval entry. Keep track of when your first treatment was applied and how long it lasts. If it is waning during the period of peak egg hatch, consider applying your second application sooner (by 1-2 days).
Insecticides that target both larva and egg stages are recommended. Such as: Altacor, Assail, Calypso, and Intrepid. Homeowners should use horticulture oil with a product such as sevin for their first spray. The oil will smother unhatched eggs and the sevin will protect the fruit from hatched larva. Good residue coverage on your fruit is vital during the first generation.
Read and follow all label instructions when applying pesticides. If you use a pyrethroid based insecticides, chose a different class pesticide for your second spray, such as Assail, Calypso, Intrepid, or Imidan. Insects develop resistance to pyrethroids very quickly.
» http://extension.usu.edu/files/publications/factsheet/codling-moths06.pdf
» http://jenny.tfrec.wsu.edu/opm/displayspecies.php?pn=5
» http://www.ipm.ucdavis.edu/PMG/r4300111.html
» http://extension.colostate.edu/topic-areas/insects/codling-moth-control-in-home-plantings-5-613/
Aphids
Landscape and Garden All Locations
Aphid
Posted on: April 28, 2016 by Dian Roberson
Aphids are being reported on succulent new spring growth of a variety of landscape plants from Apple trees to Lupine. Remember, a stiff spray of water could be all it takes to reduce or eliminate populations. Check plants closely for Ladybug Larvae and other predators before taking action with chemicals. Nature may already be on the job!
» http://insect.pnwhandbooks.org/hort/nursery/common/nursery-crop-pests-aphids
» http://insect.pnwhandbooks.org/tree-fruit/apple/apple-woolly-apple-aphid
» http://extension.oregonstate.edu/gardening/how-control-aphids-less-toxic-methods
» https://www.facebook.com/journal.environmental.agricultural.sciences/videos/939087619502267/?fref=nf
Beet Leafminer in Spinach, Swiss Chard and Garden Beets
Landscape and Garden All Locations
Posted on: April 27, 2016 by Ariel Agenbroad
Notice small white clusters of eggs on the backsides of your spinach, beet and Swiss Chard plants? Or are the leaves showing damage that looks papery or like winding trails? Then you're probably hosting the tiny fly Beet Leafminer.
You have several options, prevention, cultural management, and both organic and synthetic chemical treatments.
See http://insect.pnwhandbooks.org/vegetable/vegetable-pests/hosts-and-pests/beet-table-leafminer for more information on how to identify the damage and manage this pest.
» http://insect.pnwhandbooks.org/vegetable/vegetable-pests/hosts-and-pests/beet-table-leafminer
Alfalfa and Cabbage Looper
All Crops All Locations
Alfalfa Looper
Posted on: April 23, 2016 by Rich Guggenheim
Alfalfa Looper is being seen throughout the area. They are similar in appearance to Cabbage looper. The major damage caused by larvae and pupae is contamination of the heads of cole crops and processed foods, and defoliation of peas, alfalfa, beans, mint, and spinach.
» http://horticulture.oregonstate.edu/content/cabbage-looper-alfalfa-looper
» http://www.ipm.ucdavis.edu/PMG/r114300711.html
Dig In Newsletter
All Crops All Locations
Posted on: April 19, 2016 by Rich Guggenheim
Check out the Spring edition of the Dig In Newsletter:
May ISDA Pesticide Disposal Program
All Crops All Locations
Posted on: April 19, 2016 by Rich Guggenheim
The Idaho State Department of Agriculture is conducting a pesticide disposal program May 9 at Pickles Butte Landfill. 15500 Missouri Ave, Nampa. May 10 at the ITD Maintenance Yard. 550 Indian Head Rd, Weiser. Collection times are 9 am to 1 PM both days.
Exclusion Methods BMP for Elm Seed Bug
Landscape and Garden All Locations
Elm Seed Bug
Posted on: April 15, 2016 by Rich Guggenheim
Elm seed Bug (ESB) is a nuisance pest that may invade residences. The best management practice is to pest proof your home. Elm seed bugs may begin migrating from overwintering sites to their host plants now. Elm Seed bugs emit a foul odor when crushed.
» http://extension.oregonstate.edu/malheur/sites/default/files/spring_2013_esb_fact_sheet.pdf
Frost Advisory
All Crops All Locations
Frost
Posted on: March 25, 2016 by Rich Guggenheim
Temperatures are expected to drop into the mid to upper 20s tonight. Protect tender plants.
Freeze can damage fruit buds and young fruit. The level of damage is directly related to cold intensity and duration as well as bud developmental stage. Information on that can be found at
http://extension.usu.edu/files/publications/factsheet/pub__5191779.pdf
and
http://extension.colostate.edu/docs/pubs/garden/07426.pdf
More information on frost protection and season extension can be found below
http://www.ext.colostate.edu/mg/gardennotes/722.html
For more information, contact your local University of Idaho Extension office or visit
http://www.extension.uidaho.edu/
» http://extension.usu.edu/files/publications/factsheet/pub__5191779.pdf
» http://www.ext.colostate.edu/mg/gardennotes/722.html
Time to apply pre-emergent for crabgrass control
Announcements All Locations
Posted on: March 7, 2016 by Dian Roberson
Crabgrass can be difficult to control in lawns after it has germinated. Now is the time to apply a pre-emergent herbicide to control crabgrass and some other broad leaf weeds. A pre-emergent herbicide is one that kills seedlings as they emerge. To be effective they need to be applied before the weed pest appears. Here is some information about identifying crabgrass and how to control it.
» http://pnwhandbooks.org/weed/crabgrass-smooth
» http://www.ext.colostate.edu/ptlk/1541.html
» http://extension.colostate.edu/docs/pubs/garden/03101.pdf
» http://lawncare.about.com/od/organiclawncare/a/corn_gluten.htm
Glyphosate Tolerant Creeping Bentgrass: Meeting with USDA - March 1
All Crops All Locations
Glyphosate tolerant creeping bentgrass
Posted on: February 23, 2016 by Stuart Reitz
On March 1 from 5-7 pm Sid Abel Assistant Deputy Administrator of USDA APHIS’ Biotechnology Regulatory Services will provide an overview of APHIS’ role in the regulation of glyphosate tolerant creeping bentgrass, information on the recent agreement with the The Scotts Company, and the new petition for deregulation.
The overview will be followed by a Q&A session.
If you have concerns regarding glyphosate tolerant bentgrass, please plan to attend.
The meeting will be at the Malheur County Extension, 710 SW 5th Ave., Ontario, OR 97914. 541-881-1417
Prepare to treat your Peach and Nectarine Trees this fall
Tree Fruits All Locations
Various Peach/Nectarine Tree Fungal Diseases
Posted on: October 5, 2015 by Ariel Agenbroad
If you had confirmed cases of Shothole Disease, Peach Leaf Curl or other fungal diseases in your Peaches, Apricots and Nectarines, fall spraying can be an effective part of your protection and prevention strategy.
At about 50% leaf fall, spray an approved Copper Based Fungicide, Bordeaux Mixture or Lime Sulfur at the rate listed on the product.
For more information and specific products to use, visit the links below.
» http://pnwhandbooks.org/plantdisease/peach-prunus-persica-shothole-coryneum-blight
» http://pnwhandbooks.org/plantdisease/peach-prunus-persica-leaf-curl
Fall Garden Pests Remain Active
All Crops All Locations
Aphids and Beet Leafminer
Posted on: September 17, 2015 by Ariel Agenbroad
The weather is cooling off, but some insect pests are enjoying a resurgence in the garden.
Watch your fall brassica crops like cabbage, kale and broccoli for new generations of aphids, they are flourishing in the cooler temperatures. Spray any insects off with a stream of water or use an insecticidal soap.
Also watch for leafminer damage in your late season spinach, beets and Swiss Chard. Removing and disposing of any affected leaves is the best strategy at this point in the season. For next year, use a protective row cover to keep the flies off their favorite crops!
For more information on both of these pests, visit the links below.
» http://hortsense.cahnrs.wsu.edu/Public/FactsheetWeb.aspx?ProblemId=189
» http://hortsense.cahnrs.wsu.edu/Public/FactsheetWeb.aspx?ProblemId=188
