Rimon Ovicide degree day applications
The Rimon label states that it wants to be on between 50-75 degree days(DD) in Western states. If we Include the success of the trials Wilbur Ellis completed with this product, appling material at 100 and 1000 DD,
The 1st generation has a window that could be from 50 to 100 DD giving large orchadists a little more time to cover their acres. The 2nd generation should be applied starting at 1000 degrees. Submitted by Tom Tankersly
Estimating DD with the projected forcast expect to reach 50 DD on Monday in most parts of the Treasure Valley.
Good Luck!
Codling Moth Biofix all Over Treasure Valley
Biofix for Codling moth was reached May 5 in all locations in the treasure Valley. Emmett, Sunnyslope, Parma, Fruitland, and the Upper Snake River Valley all caught 4 or more moths. Altacor has recieved federal Registration and are wating on State registration. Ovicides should be purchased for this weekends application. Apply Ovicides at 70 to 100 degree days. Further information on Codling Moth control with be forthcoming.
Tony McCammon
Cereal Leaf Beetle
Dr. Brad Brown from the UI Parma Research and Extension Center is reporting that with the warmer weather, cereal leaf beetle adults can be seen flying and egg laying is beginning. It is not too early to start scouting for CLB eggs as an indication of potential larvae populations. Spring planted grains are preferred by CLB over winter planted grains.
ISDA Pesticide Disposal Program
The Idaho State Department of Agriculture is sponsoring a pesticide disposal program in the Treasure Valley on May 12 and 13, 2008.
Click on the thumbnail at the bottom of this alert for more information.
Potential Freeze Damage to Cereals
On Monday April 21 temperatures plummeted in the Treasure Valley Area. Readings at the Malheur Experiment Station went as low as 21 F. The effect on winter cereals in the area will be dependent on the stage of the crop on that day. Those fields that had the growing point above ground (jointing) when this freeze event came may have moderate to severe damage. Producers can split open some stems and check the developing head. If the head is green or light greenish in color and seems firm, it is probably fine. If the head is yellowish and mushy, it may have freeze injury.” Healthy tillers will help compensate for yield losses to main stems. The links below have a summary of growth stages, the temperatures required for wheat and barley freeze damage, primary symptoms and yield effects.
Please see pages two and three of the Growing Treasure in the Valley Newsletter found at
http://extension.oregonstate.edu/malheur/Agriculture/Newsletters/Gr%20Tr_Apr_2008.pdf.
Other references can be found at: http://www.oznet.ksu.edu/library/crpsl2/c646.pdf
and
http://www.uidaho.edu/so-id/entomology/bulletin_724.htm
Tree Fruit Frost Alert through Tuesday
Frost warnings that are in effect through Tuesday. Low temperatures will be dropping to the mid to low 20’s. Fruit blossoms and buds will be susceptible to losses.
See attached Table on critical temperatures for flower and bud damage.
Orchardists use heaters if available, or turn on wind machines.
Homeowners use overhead irrigation, but this can be costly. The idea is to cover the buds and blossoms with water that will freeze, forming an ice layer. Remember that water freezes at 32 degrees F, and a permanent, uninterrupted layer of ice throughout the frost period will insulate flowers and buds. The ice must remain until the daytime air temperatures rise above freezing.
The last freeze will occur 2 out of 10 years after May 4 at a temperature of 28 degrees or less in Payette County, May 6th in Emmett and Parma, May 13th in Weiser, and April 27th in Caldwell.
tree stages:
Apple Peach Cherry Apricot
Payette 1/2"green pink bud-swell bloom
Fruitland cluster pink bud-swell bloom
Parma pre-pink pink bud-swell post-blm
Emmett cluster bloom white bud post-blm
Sunnyslope cluster bloom white bud post-blm
A 10% loss of a tree’s flowers may be tolerable for some growers. They may consider it as a thinning technique this year.
As you have seen we have had a cool spring thus far and are quite a bit behind what we have been in previous years. If this keeps up it may give growers the upper hand on coddling moth this year.
DD Temperatures as compared to the last 3 years
Here are DD from March 1 for the past years as of April 18 AM each year in Payette. Courtesy of Bill Ford:
2005 119
2006 75
2007 169
2008 64
New Potato GAP Website and Manual
The University of Idaho has designed a new comprehensive organizational manual and website for potato growers to help simplify the necessary requirements to successfully pass the USDA GAP Audit. At the website you can easily access the documents and make necessary changes appropriate to your farming operation. Documents also include examples of employee policy forms in both English and Spanish, Standard Operating procedures (SOP) as related to the current Audit, and additional website information. All information is present on the website to compile a hard-copy manual in a 3-ring binder with all related documents inserted.
The website is:
http://www.kimberly.uidaho.edu/potatoes/gap.htm
When changes occur to the audit or with the documents provided at this website, an email notification will be sent via PNWPestalert. Feel free to contact me directly regarding suggestions for the website and documents (Nora Olsen, 208-736-3621; norao@uidaho.edu).