Default Biofix Dates
Many pest forecast and crop management tools require a biofix date to start calculating the pest risk and crop results. NEWA tools utilize default biofix dates, estimated as described below, for users who are not tracking the specific biofix. For improved accuracy, always use your recorded biofix date for the crop or pest management tool you are interested in.
Click here to download a useful PDF record sheet for apple phenology and insect first trap catch dates.
| Crop or IPM Tool | Biofixes | Default Biofix Date |
|---|---|---|
| Apple Scab | 50% McIntosh green tip | Estimate based on DD accumulations correlated with historical observations. |
| Fire Blight | First blossom open | Estimate based on DD accumulations correlated with historical observations. |
| Sooty Blotch and Flyspeck | 90% petal fall | Estimate based on DD accumulations correlated with historical observations. |
| Apple Maggot | First trap catch | Estimate based on DD accumulations correlated with historical observations. |
| Codling Moth | First sustained trap catch; Second generation flight start | Estimate based on DD accumulations correlated with historical observations. |
| Oriental Fruit Moth | First sustained trap catch; Second generation flight start; Third generation flight start | Estimate based on DD accumulations correlated with historical observations. |
| Obliquebanded Leafroller | First sustained trap catch | Estimate based on DD accumulations correlated with historical observations. |
| Plum Curculio | 90% petal fall | Estimate based on DD accumulations correlated with historical observations. |
| San Jose Scale | First trap catch; Second generation emergence | Estimate based on DD accumulations correlated with historical observations. |
| Spotted Tentiform Leafminer | First trap catch; Second generation flight start | Estimate based on DD accumulations correlated with historical observations. |
| Apple Carbohydrate Thinning | Green tip; Bloom | Estimate based on DD accumulations correlated with historical observations. |
| Apple Irrigation | Green tip | Estimate based on DD accumulations correlated with historical observations. |
| Grape Berry Moth | Wild grape bloom | Estimate based on DD accumulations correlated with historical observations. |
| Tomato Diseases | Transplant date | May 15 |
| Tomato Diseases | Date of potato cull sprouting or volunteer emergence | May 1 |
| Onion Diseases | Planting date | April 21 |
| Potato Diseases | Emergence date | May 10 |
| Potato Diseases | Date of potato cull sprouting or volunteer emergence | May 1 |
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