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Wheat Disease Update
From: "Tisserat,Ned" <Ned.Tisserat@colostate.edu>
To:
Date: 04/27/2012 01:25 PM
Subject: Wheat Pest Update
Rust Diseases:
Earlier in the week I noted that the hot weather was not good for stripe rust development, but warned that things could change. What a difference a few days makes! The heavy rains in parts of Colorado, coupled with the cooler weather has been good for stripe rust development. Although we have few reports of rust in the state now (some in the southeast) there is apparently lots of stripe rust to the east in Kansas (Hays and to a lesser extent west of there). Scout your fields carefully this coming week. There are many excellent fungicides available for controlling stripe rust, but remember that they work best if they are applied to the fully emerged flag leaves. I have reattached a slightly revised table of fungicides.
Scott Haley has been in touch with agronomists and breeders in other states concerning the stripe rust epidemic and susceptibility of certain varieties. For example, those varieties in group 4 are still holding their resistance. Scott shares some of his thoughts below.
Reports from other Great Plains states have also suggested that we have had another change in the stripe rust pathogen. Many will recall the stripe rust epidemic in 2010 and that this also coincided with a change in the stripe rust pathogen ("races") that rendered some previously-resistant varieties susceptible. Initial reports several weeks ago from Texas, and then now extending from Oklahoma to Kansas, suggest that certain varieties that maintained their resistance in 2010 are now showing significant symptoms in response to the new race(s) of stripe rust. Some of these reports have also suggested that early infections were mostly the new race(s) that have appeared in 2012, while subsequent infections from the race(s) identified in 2010 were increasing. For producers in eastern Colorado, the safest assumption to make is that we will receive a mixture of both the new and older race(s) of stripe rust pathogen.
The following lists of relative risk due to stripe rust are provided to give some guidance to producers for management decisions in 2012. Some of this information has been obtained from informal reports from scientists in Texas, Oklahoma, and Kansas and are subject to change as further information becomes available. Many of the following varieties are minor varieties according to the 2012 Colorado wheat variety survey (available at http://bit.ly/zeVO9d), though some growers may have these varieties on their farms. If a particular variety is not in one of the following groups it is because we lack current information or its reaction is not certain.
1) Varieties at relatively higher risk due to susceptibility regardless of any race change
Above
Akron/Ankor
Bond CL
Platte
Prairie Red/TAM 107
Ripper
TAM 112
2) Varieties at relatively higher risk with race change in 2010
AP503 CL2
Danby
Fuller
Jagger
Jagalene
Keota
NuDakota
Protection
SY Gold
Smoky Hill
WB-Stout
3) Varieties at relatively higher risk with potential race change in 2012
Armour
Denali
Everest
TAM 111
4) Varieties that reportedly are still resistant or moderately resistant
Bill Brown
Byrd
Brawl CL Plus
Duster
Hatcher
Settler CL
Snowmass
T158
T163
Thunder CL
Winterhawk
Ned Tisserat
Extension Specialist and Professor
Bioagricultural Sciences and Pest Management
Plant Sciences 1177
Ft. Collins CO 80523
Ned.Tisserat@colostate.edu
970-491-6527
970-491-3862 (FAX)
Wheat Starter Comparison Picture!
February 10, 2012 - Ag PhD's Darren Hefty has a lot to say about Agro-Culture Liquid's Research! Watch the video.
February 10, 2012 - Agro-Culture Liquid Fertilizer has there 2011 Research Data published now! READ HERE
*KIDS* - Watch FarmGuyTV through Agro-Culture Liquid Fertilizer to see what he is up to. Also on his page print off the coloring contest pages to send in and have a chance for prizes! Watch FarmGuyTV
Aero Applicators would like to welcome our New Secretary Jenn Jones!
Responsible Nutrient Management
Farm American Program
Agro-Culture Liquid Fertilizer
Aero Applicators would like to welcome our new pilot!
We would like to congratulate Jason for becoming a commercial pilot! He will be flying this Weatherly next year doing some spraying.
Pilots returning for the 2012 Season!
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Hey there, my name is Travis Matthews. I'm a second generation Ag. Pilot from Glen Alan, Mississippi. I am looking forward to a safe and successful season here at Aero Applicators. |
Roger Bock is a Corn & Soybean Farmer from Williamsville, Illinois. Roger will fly our other AT-402 through the busy season. |
Please notify Aero Applicators of any new Bee Hive's, Power lines, or Towers that have been placed on your property so that we can keep everybody as safe as possible. Thanks!
