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  5. Fruit Research and Extension Center
  6. Seasonal Monitoring Data and Models

Seasonal Monitoring Data and Models

Seasonal disease, insect, and thinning models for precision management of fruit diseases, insect pests, and crop load.

Insect Pests - Trap Count Data

Weekly update information on trap counts for Codling Moth, Obliquebanded Leafroller, Oriental Fruit Moth, Redbanded Leafroller, Spotted Tentiform Leafminer, and Tufted Apple Bud Moth.

Apple Diseases

Seasonal infection periods for apple scab, fire blight, and sooty blotch/flyspeck for regions throughout Pennsylvania and central Maryland.

Apple Carbohydrate Thinning Model

The Cornell Apple Carbohydrate Thinning Model is an attempt to factor in the interaction of environmental conditions and a tree’s physiological status for precision crop load management.

Apple Maturity Assessments

Routine measurements of fruit starch levels, ground color and other maturity indices allow growers to make improved decisions about optimum harvest dates for long-term storage. During August through the end of October, 2017, this site will be updated weekly with both tables and photos that demonstrate progressions in apple maturity.

Contact Information

Grzegorz (Greg) Krawczyk, Ph.D.
Grzegorz (Greg) Krawczyk, Ph.D.
  • Extension Tree Fruit Entomologist
  • Email gxk13@psu.edu
  • Office 717-778-4592

Fruit Research and Extension Center

  • Fruit Research and Extension Center Overview
  • Seasonal Monitoring Data and Models
    • Seasonal Monitoring Data and Models Overview
    • Insect Pests - Trap Count Data
    • Apple Diseases
    • Apple Carbohydrate Thinning Model
    • Apple Maturity Assessments
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Penn State Extension Tree Fruit Education

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Production Guides

Fruit Production for the Home Gardener

Grow your own fruit on a small scale.

Tree Fruit Production Guide

Get the most up-to-date information on growing tree fruit on a commercial scale.

Social Media

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Production Guides

Fruit Production for the Home Gardener

Grow your own fruit on a small scale.

Tree Fruit Production Guide

Get the most up-to-date information on growing tree fruit on a commercial scale.

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