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Vista Bella Farm

Malagash Centre, Nova Scotia

Ecowitt apple scab and seasonal GDD monitoring for the Vista Bella Farm orchard block.

Ecowitt orchard disease tracking

Apple scab tracker

This page replaces the old notebook output with one generated page. It combines a primary infection view from the Mills wetness table and an ascospore maturity tracker based on cumulative degree-days from the configured biofix date.

Latest sample

2026-05-26 16:35
Apple fruit showing apple scab lesions

Fruit symptom reference

Apple scab on fruit

Reference image for the lesions and roughened fruit finish associated with apple scab pressure later in the season.

Apple leaf with apple scab lesions

Leaf symptom reference

Apple scab on leaf tissue

Leaf infection is where the wetness and temperature models matter most early in the season, so this panel now uses a clearer apple-leaf scab reference.

Live scab snapshot

Open to view the current Ecowitt wetness, temperature, degree-day snapshot, recent trend chart, and current model severity summaries.

Current leaf wetness

0.0%

Current Ecowitt `leaf_ch1` sample.

Current temperature

17.4 C

Outdoor Ecowitt air temperature at fetch time.

Ascospore degree-days

352.4 / 760

Accumulating since 2026-04-23.

Approximate mature ascospores: 44.0% of the seasonal pool.

Recent Ecowitt trend

Choose one variable per axis and a time window to compare Ecowitt station history.

Time window
Left axis
Right axis
Time window: Last 24 hours Left axis: Leaf wetness (%) Right axis: Outdoor temperature (C)
1007550250 30221580 05-24 16:3505-25 08:1505-26 00:5005-26 16:35 Leaf wetness (%) Outdoor temperature (C) Last 48 hours
Wetness threshold for event capture: 10% Polling cadence: every 2 minutes Short dry breaks up to 90 minutes are merged into one scab event Ascospore biofix: 2026-04-23

Active leaf wetness event

Live severity estimate from the current Ecowitt wetness run.

Inactive

OMAFRA Primary: None Mills Secondary: None Duration: 0.0 hours
No active wetness event right now.The page will estimate severity again as soon as leaf wetness rises above threshold.

Latest completed event

Most recent finished wetness event severity summary.

OMAFRA Primary: None Mills Secondary: None OSU Ascospore: Mid release (352 DD) Cluster span: 8.17 hours Wet hours: 7.25

Date controls

Choose the scab start and end window that should drive the GDD views on the page.
Server biofix: 2026-04-23 Displayed degree-days: 352.4 / 760

Ascospore degree-days

352.4 / 760 GDD. Accumulating since 2026-04-23. Open for the seasonal accumulation chart, 760 DD target line, and prior-season threshold dates.
7605703801900 760 DD target 04-2305-0405-1505-26 Cumulative GDD Date
Current biofix: 2026-04-23 760 DD target reached this season: Not yet reached Approximate mature ascospores at this GDD level: 44.0%
Day Daily GDD Cumulative GDD
Season Biofix 760 DD Reached Final GDD
20262026-04-23Not reached352.4

Recent wetness events

Open to browse clustered scab events and compare the OMAFRA primary, Mills secondary, and OSU ascospore context for each wetness window.
Start End Cluster Span (h) Wet Hours Dry Breaks (h) Avg Temp (C) Avg Wetness (%) OMAFRA Primary Mills Secondary Risk OSU Ascospore

Model notes

Reference notes for the primary and secondary Mills infection thresholds plus the seasonal ascospore maturity tracker.
Model 1: OMAFRA primary infection

Calculation used: match the event average temperature to the closest OMAFRA wetness row, then compare clustered wet hours against the light, moderate, and heavy wetness thresholds from that row.

Use on the page: this is the primary infection severity shown in the event table and summary cards.

Source: OMAFRA relationship of temperature and moisture to apple scab infection

Model 2: Mills secondary infection

Calculation used: match the event average temperature to the closest secondary infection row, then compare clustered wet hours against the infection-hour threshold for that row.

Use on the page: this is the secondary infection severity shown beside the OMAFRA primary result for each event.

Source: APS apple scab education center and Mills-style infection guidance

Model 3: OSU ascospore maturity

Calculation used: accumulate degree-days above 0 C from the configured biofix date, compare that running total to the 760 DD threshold, and describe the maturity stage reached by the end of each event.

Use on the page: this estimates how mature the seasonal ascospore pool is, and how much more of the yearly ascospore supply likely matured since the last completed event.

Source: OSU apple scab model interpretation

Source: Gadoury and MacHardy 1982 ascospore maturity model