Insect pest spray timing by degree days

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Each tool's price and track record across every agent today. Empty means the call worked and found nothing.

# Insect pest spray timing by degree days

For one field, one pest and its biofix date. The field point and the model's base temperature carry into every step.

## 1. Degree days so far

1. Read @[ACIS · Daily weather history](alexandria:rcc-acis-org/weather-history/daily_weather_history) from the biofix date to yesterday with gdd_base_f set to the pest model's base. Sum daily GDD.

## 2. Next seven days

2. Read @[National Weather Service · Forecast daily](alexandria:api-weather-gov/weather/forecast_daily) for the field. Estimate each day's GDD from forecast highs and lows at the same base, and the date the model's action threshold is reached.

## 3. Spray windows

3. Read @[National Weather Service · Forecast hourly](alexandria:api-weather-gov/weather/forecast_hourly) for the field. Mark hours with low wind and no rain in the following hours.
4. Read @[NASA POWER · Daily weather](alexandria:power-larc-nasa-gov/weather-history/daily_weather) for the last two weeks (RH2M, T2M) as context for disease pressure on the same crop.

## Write the timing plan

- **GDD:** accumulated from biofix and projected by day.
- **Threshold date:** when the model calls for scouting or treatment.
- **Spray windows:** dates and hours with suitable wind and rain conditions.
- **Caveats:** use the base and thresholds from your extension model; this skill does not supply them.
- **Sources:** cite every figure to the capability and record it came from. Say what could not be found rather than guessing.

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