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VM Traubenwickler

Last modified by geosens on 2025/03/18 22:18

Overview

The Grape Moth tool predicts the development and activity of grape moths (Lobesia botrana and Eupoecilia ambiguella), helping users time their pest control measures effectively. The tool uses weather data to assess moth flight, and development stages. This guide explains how to interpret and use the tool’s graphs for managing grape moth populations.

1. Understanding the Risk Overview Table

Purpose

The Risk Overview Table provides first information of the development and activity of grape moths over time. Key components include:

  • Date Row: Indicates the observation and forecast period, with the forecast section grey shaded.
  • Development Stage: Displays the percentage of grape moths in development stages (e.g., flight, egg-laying, larval activity).
  • Cumulative Temperature Sums (Degree Days): Tracks temperature accumulation since a defined starting point, correlating with biological activity.

Key Thresholds

  • Flight Initiation: Begins once the threshold degree days are reached.
  • Egg Laying and Larval Development: Occur during specific cumulative degree day intervals, highlighted in the table.

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2. Interpreting the Graphs

The graphs cover include:

  • Historical data
  • Current day
  • Forecast data

Graph Components

  1. Flight and Development Curves

    • Show the development of the population and indicates when to do what. Tells users when to hang up a dispenser for example.
    • Each stage corresponds to thresholds of cumulative degree days.

  2. Risk Bars

    • Use color codes to indicate the activity level and urgency for pest control measures.

  3. Weather Data

    • Includes daily averages for:
      • Temperature: Influences development rates.
      • Precipitation: Affects moth behavior and treatment efficacy.
      • Humidity: Can impact egg and larval survival.

3. Practical Application

To use the graphs effectively:

  1. Monitor Development Stages:

    • Identify when specific stages, like peak flight or egg-laying, are occurring based on curves.

  2. Plan Treatments:

    • Time pesticide applications or other interventions during high-risk periods, such as when larvae are hatching.

  3. Adjust Strategy Based on Weather:

    • Evaluate weather conditions to ensure effective pest management, particularly during wet periods that may impact moth activity.