Intermediate Wheatgrass Diversification

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Intermediate Wheatgrass Diversification

May 11, 2016

Marirose Kuhlman, Chuck Casper, and Dan Mummey share a report on a native species survey in intermediate wheatgrass stands. The goal of the survey is to determine likely seed candidates to diversify these areas.

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Unlike crested wheatgrass stands, intermediate wheatgrass stands are in decline and amenable to invasion by native and alien species. We surveyed native species in intermediate wheatgrass stands to determine likely seed candidates to diversify these areas.

Pathogens sicken intermediate wheatgrass in areas. We are investigating the cause but suspect a common wheatgrass pathogen, Pyrenophora trichostoma.

Species Found

Woollypod milkvetch (Astragalus purshii) is a common native invader in the intermediate wheatgrass stands.Woollypod milkvetch (Astragalus purshii) is a common native invader in the intermediate wheatgrass stands.

We are excited to see balsamroot establishing and flowering in intermediate wheatgrass stands. Natural balsamroot establishment suggests we can drill-seed to facilitate establishment in areas where there is no seed source nearby.

Silky lupine (Lupinus sericeus) recruits naturally in intermediate and crested wheatgrass stands and is a good candidate for drill-seeding.

Lupine seedlings

Hairy milkvetch (Astragalus inflexus)

Bigseed biscuitroot (Lomatium macrocarpum)

Larkspur (Delphinium bicolor)

Leafy spurge is the salient invader. Leafy spurge control in intermediate wheatgrass stands is a priority again this year.

Sainfoin established after drill-seeding last fall. We are monitoring establishment success and forage production.