Branched Broomrape Growth Stage and GDD Calculator — California Processing Tomato

🌡️ Tracks cumulative Growing Degree Day (GDD) and predicts developmental stages of branched broomrape (Phelipanche ramosa L.) since transplanting (Base Temp = 10 °C / 50 °F), using observed weather, a 16-day forecast, and 5-year historical averages for dates beyond the forecast horizon.

📊 Critical Dates for Management

Management Actions	5-Year Average	Selected Date Range

📝 Printable Worksheet

Grower / Farm Name

Field Identifier

Notes

📄 Branched Broomrape Anonymous Management Worksheet

This worksheet is intended as a planning and record keeping aid for growers. These data are not saved or stored anywhere.
Management date recommendations projected more than two weeks in advance are based on the 5-year average weather data. For improved accuracy with current-season weather data, management action dates should be updated and verified within two weeks of the target date.
* Dates marked with an asterisk are based on 5-year average weather data rather than the user-selected date range, because predictions are only provided for the next two weeks.

Management Action	Recommended Date (based on user-entered date range)	Actual Date Completed	Notes

Branched Broomrape Growth Stage and GDD Calculator — California Processing Tomato

📍 Location

📅 Date Range

📈 GDD Accumulation

🌱 Broomrape Developmental Stages

📊 Critical Dates for Management

📝 Printable Worksheet

📄 Branched Broomrape Anonymous Management Worksheet