Invasive annual grasses are absent or occur at very low levels relative to perennial grasses, forbs, and/or bare ground. They likely have little effect on ecological function. These areas often have the greatest potential to maintain or recover desired conditions with relatively low management inputs.

The primary management strategy is typically to maintain. Large, contiguous areas in this condition are often high priorities for protection. Where surrounding lands are mostly Moderate or higher severity, expect greater seed pressure and wildfire risk, and plan for sustained scouting and repeat entry rather than one-time action.

Management expectations should account for this broader landscape context.

Typical actions include:

• Prevent new introductions by reducing exposure to invasive annual grass seed sources.
• Use early detection and rapid response (EDRR) to identify and control new invasions before they become established or widespread.
• Spot-treat invasive annual grasses with appropriate herbicides where needed to protect or release desired perennial vegetation.
• Minimize excessive ground disturbance that removes perennial vegetation or creates opportunities for invasion.
• Manage livestock, vehicles, equipment, roads, trails, and other vectors that can transport invasive annual grass seed onto the site.
• Regularly scout and monitor for new invasions.
• Ensure grazing strategies support perennial grass health and recruitment.

These generalized interpretations should be refined based on on-the-ground conditions, site-specific objectives, and other relevant information. Always follow herbicide label directions and applicable laws, regulations, and agency requirements.

Invasive annual grass cover is relatively low compared with perennial grasses, forbs, and/or bare ground. Ecological impacts are likely still limited, but the risk of increasing invasion and associated wildfire is increasing. These areas often represent important transition zones where proactive management can help maintain desired conditions and prevent further degradation.

The primary management strategy is typically to maintain, and large, contiguous areas in this condition are often high priorities for management. Where surrounding lands are mostly Very Low or Low severity, that strategy holds with routine treatment and monitoring. Where surrounding lands are mostly Moderate or higher severity, maintaining current conditions becomes more difficult because of increased seed pressure and wildfire risk.

Management expectations should always account for broader landscape context.

Typical actions include:

• Spot or broadcast apply appropriate herbicides to suppress invasive annual grasses and release desired perennial vegetation.
• Monitor treatment response and repeat treatments as needed to reduce annual grass establishment and seed production.
• Reseeding may be required in localized areas where perennial vegetation is insufficient for recovery.
• Ensure grazing strategies support perennial grass health and recruitment.

These generalized interpretations should be refined based on on-the-ground conditions, site-specific objectives, and other relevant information. Always follow herbicide label directions and applicable laws, regulations, and agency requirements.

Invasive annual grasses occur at moderate levels relative to perennial grasses, forbs, and/or bare ground. They are likely impairing ecological function and elevating wildfire risk. These areas may retain substantial recovery potential, depending on ecological site characteristics, resilience, and the abundance of desired perennial vegetation. Successful management often requires an integrated, multi-year approach.

The primary management strategy is typically to improve. These areas are important opportunities to act before perennial cover and other resource values are lost, particularly where Moderate severity occurs in small patches or adjacent to high-value areas. Where surrounding lands are mostly High or Severe, reinvasion pressure and wildfire risk are higher, and gains are harder to hold without follow-up treatment.

Management expectations should always account for broader landscape context.

Typical actions include:

• Broadcast apply appropriate herbicides where sufficient perennial vegetation remains to suppress invasive annual grasses and release desired plants.
• Monitor treatment response and repeat treatments as needed to reduce annual grass establishment, biomass, and seed production.
• Incorporate grazing strategies that reduce annual grass fine fuels while maintaining or improving perennial grass health, such as dormant-season or other targeted grazing approaches where appropriate.
• Reseeding may be required in localized areas where perennial vegetation is insufficient for recovery.

These generalized interpretations should be refined based on on-the-ground conditions, site-specific objectives, and other relevant information. Always follow herbicide label directions and applicable laws, regulations, and agency requirements.

Invasive annual grasses dominate the site during most years relative to perennial grasses, forbs, and/or bare ground. Ecological function is impaired and wildfire risk is greatly elevated. Recovery potential is variable, and treatment outcomes are generally less predictable and require greater management inputs.

The primary management strategy is typically to improve where site potential supports perennial recovery, and revegetate or contain where it does not. These areas are higher priorities when they sit next to lower severity, intact or otherwise high-value lands, where treatment protects adjacent resources or blocks further expansion. Where surrounding lands are mostly Severe, expect high seed pressure and recurrent fire, and weight effort toward containment and protecting the better ground nearby.

Management expectations should always account for broader landscape context.

Typical actions include:

• Broadcast apply appropriate herbicides where sufficient perennial vegetation remains to suppress invasive annual grasses and release desired plants.
• Monitor treatment response and repeat treatments as needed to reduce annual grass biomass and seed production.
• Use grazing strategies to reduce annual grass fine fuels while maintaining perennial vegetation, including dormant-season or targeted grazing where appropriate.
• Revegetate targeted areas where perennial vegetation is insufficient for natural recovery, typically using an integrated approach of site preparation, spraying, and seeding.

These generalized interpretations should be refined based on on-the-ground conditions, site-specific objectives, and other relevant information. Always follow herbicide label directions and applicable laws, regulations, and agency requirements.

Invasive annual grasses overwhelmingly dominate the site relative to perennial grasses, forbs, and/or bare ground. Ecological function is impaired and wildfire risk is extremely elevated. Recovery potential is generally low, but can be highly variable, and successful stabilization and rehabilitation often requires sustained, multi-year treatments.

The primary management strategy is typically to revegetate or contain. These areas are priorities where revegetation is feasible, where invasion threatens adjacent high-value areas, or where treatment reduces wildfire and seed-spread risk. Where surrounding lands are mostly Moderate or lower severity, containment to protect those neighbors is usually the higher return; where the site sits within a large Severe landscape, expect low returns on revegetation and focus on fuel breaks and strategic protection of specific values at risk.

Management expectations should always account for broader landscape context.

Typical actions include:

• Contain invasive annual grass spread by reducing seed movement from heavily invaded areas by managing livestock, vehicles, equipment, roads, trails, and other vectors that can transport invasive annual grass seed offsite.
• Adjust season and timing of use where appropriate to reduce seed transport and avoid activities that increase soil disturbance or seed dispersal.
• Use targeted or dormant-season grazing, where appropriate, to reduce annual grass biomass and fine fuels.
• Establish strategic fuel breaks or greenstrips where they can reduce wildfire spread and protect priority areas.
• Revegetate with competitive (often introduced) perennial grasses where site conditions allow using an integrated approach of site preparation, spraying, and seeding.

These generalized interpretations should be refined based on on-the-ground conditions, site-specific objectives, and other relevant information. Always follow herbicide label directions and applicable laws, regulations, and agency requirements.