Bob Harveson - Extension Plant Pathologist, Panhandle Research and Extension Center

Bob Harveson

4502 Ave I Scottsbluff NE 69361-4939

Faculty Bio

UNL dry pea research
UNL dry pea research

New Dry Pea Research Studies to be Conducted in 2016 May 20, 2016

Based on the increase in dry pea acreage throughout western Nebraska, UNL conducted a comprehensive disease survey in 2015 to identify the most prevalent and important disease issues in Nebraska production. The primary problem consistently observed across the region was a bacterial blight complex caused by two distinct, but closely related pathogens: Pseudomonas syringae pv. pisi (Psp) and Pseudomonas syringae pv. syringae (Pss).

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stripe rust on wheat
Figure 2. Stripe rust on the upper leaves in a research plot at the ARDC on April 21

After Rains, Some Wheat Diseases Increasing April 22, 2016

Following rains across much of the state last week, wheat diseases appear to be increasing, based on field surveys this week. Reported diseases include powdery mildew, stripe rust, and leaf spot.

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Photos of 3 wheat fields: with stripe rust, leaf rust, and healthy
(From left) Figure 1. A hot spot of stripe rust in a research plot at the ARDC near Mead on April 14. Figure 2. Leaf rust in a research plot at the ARDC near Mead on April 14. Figure 3. A healthy wheat field in Thayer County on April 13. (Figures 1-8 by Stephen Wegulo)

Stripe Rust & Aphids Confirmed in Nebraska Wheat April 15, 2016

Wheat disease surveys on April 8 and April 12-14 found stripe rust and leaf rust at trace to low levels in south central and southeast Nebraska and in the Panhandle. Given the locations of outbreaks in Banner County this spring are the same as when the disease was identified in seedlings last fall, the two rusts may have overwintered. See more reports and management recommendations.

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Wheat Rust in Kansas; Start Scouting Nebraska Fields March 22, 2016

Due to above average temperatures this winter and going into the spring, coupled with moisture, stripe rust and leaf rust have moved north from southern states sooner than expected.

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