Transparent, not a black box

Every model shows the math and the paper.

RootView runs published, peer-reviewed turf-pathology models. Validated models output probabilities or severity; favorability flags describe conditions, not probabilities. Every model is gated to the turf species that actually hosts the pathogen, so it never shows a spurious risk.

Validated = probability / severityFavorability = conditions, not probability

Validated models

Peer-reviewed equations that output a probability or severity index. Where a model is known to over-predict, RootView flags it as an early-warning trigger to confirm in the field - not a certainty.

Dollar spot

Model · Smith-Kerns

Validated

Probability of dollar spot activity (Clarireedia spp.)

Output: Daily probability (0–100%) with a configurable spray threshold
Inputs: 5-day average air temperature5-day average relative humidity
Host turf (gated): Creeping bentgrass, annual bluegrass, and other susceptible turf
Citation: Smith, Kerns, et al. (2018). A logistic-regression dollar spot warning model. Plant Disease / Crop Science.

Anthracnose

Model · ASI (Danneberger)

Validated

Anthracnose severity pressure (Colletotrichum cereale)

Output: Severity index from leaf-wetness history (needs ~13 days to activate)
Inputs: Air temperatureLeaf wetness / relative humidity
Host turf (gated): Annual bluegrass (Poa annua)
Citation: Danneberger, Vargas, and Jones. Anthracnose severity index for annual bluegrass.

Per-green anthracnose runs once each green accumulates enough leaf-wetness history.

Pythium blight

Model · Nutter-Shane

Validated

Foliar Pythium blight risk (Pythium spp.)

Output: 150-rule value (nighttime °F + RH %) with watch / high-risk bands
Inputs: Maximum air temperatureMinimum air temperatureHours of high relative humidity
Host turf (gated): Cool-season turf under hot, humid conditions
Citation: Nutter, Shane, et al. Pythium blight forecasting model.

Known to over-predict, treated as an early-warning trigger to confirm in the field, not a certainty.

Favorability flags

Well-established favorable conditions for pathogens without a validated probability equation. These are clearly labeled as conditions so you know exactly what they mean, and what they don't.

Summer patch

Model · Soil temperature

Favorability

Conditions favorable for summer patch (Magnaporthiopsis poae)

Output: Favorability flag with onset / sustained / expression stages
Inputs: Soil temperature at rootzone depthSustained warm-soil periodsSoil moisture context
Host turf (gated): Annual bluegrass, Kentucky bluegrass, fine fescue
Citation: Based on published soil-temperature favorability thresholds for summer patch.

Conditions flag, not a fitted probability. Sensor depth may differ from the model's 2-inch reference, verify with a probe when timing the first application.

Take-all patch

Model · pH-gated (per green)

Favorability

Conditions favorable for take-all patch (Gaeumannomyces spp.)

Output: Per-green favorability flag when pH data exists
Inputs: Soil pHCool, wet conditionsSoil temperature
Host turf (gated): Creeping bentgrass
Citation: Based on published favorability conditions for take-all patch.

Assessed per green only where LSPH01 or a manual soil-test pH value exists - no guessed risk without data.

Pythium root dysfunction

Model · Soil temperature

Favorability

Conditions favorable for Pythium root dysfunction (Pythium volutum)

Output: In-window / out-of-window flag distinct from foliar Pythium blight
Inputs: Soil temperatureSeasonal timingSoil moisture and air heat stress
Host turf (gated): Creeping bentgrass, especially younger stands
Citation: Based on published favorability conditions for Pythium root dysfunction.

Brown patch

Model · Warm nights + leaf wetness

Favorability

Conditions favorable for brown patch (Rhizoctonia solani)

Output: Favorability flag from warm-night and wet-hour thresholds
Inputs: Overnight low temperatureExtended leaf wetness / high humidity
Host turf (gated): Cool-season turf; tall fescue, bentgrass, ryegrass
Citation: Based on published warm, humid favorability conditions for brown patch.

Leaf-spot pressure

Model · Warm/wet

Favorability

Conditions favorable for warm/wet leaf spot (Bipolaris/Drechslera spp.)

Output: Favorability flag - confirm pathogen by scouting before spraying
Inputs: Warm temperaturesSustained leaf wetness
Host turf (gated): Susceptible cool- and warm-season turf
Citation: Based on published warm/wet favorability conditions for leaf-spot pathogens.

Application-timing windows

Growing-degree-day windows for products where missing the timing wastes the application, crabgrass pre-emergent and Poa annua seedhead-suppression PGR, shown OPEN, CLOSING, or PAST against your site accumulation.

Crabgrass pre-emergent

Timing window · GDD

GDD

Time a single pre-emergent application against accumulated growing degree days, shown OPEN, CLOSING, or PAST for the season.

Application: Pre-emergent herbicide
Window: 0–200 GDD (base 10 °C)
GDD base: 10 °C

Poa annua seedhead suppression

Timing window · GDD

GDD

Poa annua seedhead-suppression PGR window tracked on the same site GDD accumulation as crabgrass timing.

Application: Seedhead-suppression PGR
Window: 110–280 GDD (base 0 °C)
GDD base: 0 °C

See it on your greens

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