University of Idaho Extension, Nez Perce County U-Idaho Extension Image Map

Blair Combine

Crop producers can face many pressures posed by low commodity prices, environmental regulations, rising production costs and competition for export markets. UI Extension, Nez Perce County educational programs support the contribution of small grains and alternative crops to the economy of Nez Perce County and north central Idaho. We address environmental concerns and the growers’ ability to compete in today’s marketplace. Crop advisory committees guide programming development by prioritizing the educational needs of our area farmers.

“What’s New in Pesticide Management”

    • 8:30 a.m.–Noon | Friday, December 5
      • Clarkston Campus of Walla Walla Community College, 1470 Bridge Street, Clarkston
      • 3 ISDA, 3 WSDA pesticide license re-certification credit available
      • 3 Certified Crop Advisor continuing education units available
  • Farm Bill | Crop Insurance Workshop
    • 8:30 a.m.–Noon
    • 4 locations in northern Idaho
      • January 12 |Craigmont Community Center
      • January 14 | LCSC/Williams Conference Center, Lewiston
      • January 15 | Benewah Medical Center, Plummer
      • January 16 | Boundary County Extension Office
    • Pre-registration required by calling or emailing the Idaho Barley Commission
      • (208) 334-2090 or (208) 409-9165

Crop and Cropping Systems Resources

2014 Preliminary Data
Soft White Winter and Hard Winter Wheat Trials — Lewiston/Tammany site
This trial was seeded on October 11, 2013 and harvested on July 15, 2014.  Fertility included 100-10-0-10 (N-P-K-S) applied prior to planting to both soft white and hard wheat sites.  In the spring, the hard wheat was topdressed with an additional 40# nitrogen.  This site did not have any stripe rust or other obvious disease problems.  However, the site suffered from significant drought stress which is evident in the current year yields being substantially lower than the 2- and 3-year averages.  Prior to harvest, nearby cattle escaped into the plot, causing damage to some of the plots.  Therefore, yield data for 12 plots was removed, including all four Cara plots which were preferentially grazed.

Soft White Winter and Hard Winter Wheat Trials–Genesee/Rim area

This trial was seeded on October 18, 2013, and harvested on July 30, 2014.  Fertility included 135-20-20-10 (N-P-K-S) applied just prior to planting and a spring topdress of 40# nitrogen.  Stripe rust and other disease pressure was low at this location.  In addition, this site escaped frost damage which was observed at several other north Idaho winter wheat variety testing sites.

Soft White Winter and Hard Winter Wheat Trials–University of Idaho Kambitsch Research Farm northwest of Genesee

This trial was seeded on 10/24/13 and harvested on 8/1/14.  Fertility included 100-10-0-20 (N-P-K-S) applied just prior to planting to both soft white and hard wheat sites.  In the spring, the hard wheat was topdressed with an additional 40# nitrogen.  Stripe rust was not observed at this location.  However, this site suffered from moderate drought stress and Fusarium crown rot was present across the plot.  In addition, some frost damage was observed from a cold snap on May 12th.

Soft White Winter and Hard Winter Wheat Trials–Nezperce

This trial was seeded on October 11, 2013 and harvested on August 19, 2014.  This site did not have any stripe rust or other obvious disease problems.  However, the site suffered from a combination of significant drought stress and frost damage from a cold snap on May 12th.  Most varieties had frost damage on the upper 1-3 cm of the heads and damage ranged from 0 to 73% of the heads in a given plot impacted (average of 37% for soft white and 23% for hard).  However, there was not an obvious correlation between frost damage and yield.  Due to the impact of drought and frost damage, yields were highly variable across the trial, resulting in high CVs for yield and plant height.

Note that UI/WSU Huffman has been corrected in this summary. It was incorrectly referred to as UI/LCS Huffman in previous summaries.

2013 Spring Pea, Lentil, Chickpea Variety Testing
2013 Winter Wheat Trial–Tammany/Lewiston and Genesee

Soft White Winter Wheat

Both locations suffered from dry conditions and late frosts. Plots at Tammany/Lewiston were variable in height as were many winter wheat fields in the surrounding area. Yields averaged 100 and 96 bu/A in Lewiston and south of Genesee respectively. Both sites were conventionally tilled, experienced slight rust pressure, and were sprayed with fungicide (Lewiston once at spring herbicide application, Genesee twice).  Trials were set up as three-rep lattices and analyzed using MSTAT-C.

Hard Winter Wheat

The hard winter wheat trial at Tammany averaged 96 bu/A, suffered dry conditions in May/June, and late frosts. Stripe rust was light and late.

2013 Winter Wheat Variety Trials–Nezperce

Our Nezperce winter wheat trials were direct seeded on October 18 and came through the winter well. Stripe rust was largely absent on the Camas Prairie this season, but water stress and late frosts were standard in most north Idaho fields of any elevation.

2013 Winter Wheat Variety Trials–UI Parker Farm

The University of Idaho Parker Farm experienced a deep frost in late May, dried out in June and had light stripe rust pressure late in the season.  Both trials were sprayed for rust once at spring herbicide application.  The soft white trial (long-term direct seeded, three year winter wheat-barley-legume rotation) was grazed by elk over the winter.  The hard wheat (conventional-till) was grazed by geese all spring.  No significant disease or insect pressure was observed otherwise.

2012-13 Winter Wheat Variety Trials–Summary Across Locations

Summary tables for our Camas Prairie, L-C Valley and Palouse winter wheat trial sites.  Our trial in Boundary County has been cut but not processed, yet.
These tables include new information from Tensed (Benewah Co.).  This location was very wet through the spring and seemed to avoid the worst of our mini-drought.  This location was tilled and followed lentils.  Stripe rust was light but present and our cooperator applied fungicide once in the spring.

2013 Spring Wheat Variety Trials–Genesee

Spring wheat trials on the rim south of Genesee (Kurt Blume, cooperator) were direct-seeded on April 3, 2013, and harvested August 13, 2013.  The field was fertilized with 60 lbs/A anhydrous ammonia in the fall with an additional 40 lbs/A and 80 lbs/A of 31-10-0-7.5 added at planting to the soft and hard trials respectively. A fungicide was applied with spring herbicides, but overall stripe rust pressure was low. Soil pH’s were recorded in the 5.8-5.6 range in the top 12”.

Our earliest location, we direct seeded on March 29, 2013, following winter wheat. 60 lbs anhydrous ammonia was fall applied and we put down 20 additional lbs N using 31-10-0-7.5 at planting (targeting 80 lbs N plus whatever OM became available). Soil pH’s were recorded from 5.4 in the 1-3” depth to 6.3 at the 6-12” depth. Despite a very dry late spring/early summer, late frosts, and higher than average tempseratuers throughout the rest of the summer, yields were great (63-112 bu/A with 94 bu/A average).

2013 Spring Crop Variety Trials–Craigmont

Fertility at this location consisted of 60 lbs N of pre-plant ammonia combined with 20, 40, and 80 lbs N for spring barley, soft spring wheat, and hard spring wheat respectively using 33-10-0-7.5. This site was conventional tilled following winter wheat. Little rust pressure was noted. Late frosts occurred in late May and soil moisture was limited for much of the growing season.

North Idaho Alfalfa Variety Trial

UI Extension is working with growers and cattlemen on the Camas Prairie to determine which types of alfalfa perform better under their conditions. The multi-year study includes 33 types of alfalfa and a variety of sanfoin. This research is being conducted at the request of local growers.  For more information, contact Jim Church (208) 983-2667 with UI Extension, or Ken Hart (208) 937-2311 with UI Extension, Lewis County.

stripe rust2013 Stripe Rust Update

Stripe Rust for the Pacific Northwest
Current information about stripe rust and resources for growers, researchers, and anyone interested in stripe rust can be found on the USDA/ARS Stripe Rust website

Aphid Tracker logoUniversity of Idaho Legume Virus Project

Aphid Virus Tracker

A resource for managing aphid-vectored viruses in cool season legumes


Idaho Pest Management Center

Our function is to provide pest management information for agriculture and horticulture in Idaho and surrounding states. We prioritize and coordinate pest management research for extension and educational programs and respond to the informational needs of the public and private sectors on a regional basis.

 October 23, 2013