Development of an Advisory System for Grapevine Powdery Mildew in Eastern North America: A Reassessment of Epidemic Progress

Fig. 5. Differences between actual and predicted latent periods of field-developed colonies, and the relationship between overnight minimum temperatures. As minimum temperatures no longer fall below 10°C, actual latent periods begin to approach predicted latent periods.



Image from Plant Health Progress article:
Development of an Advisory System for Grapevine Powdery Mildew in Eastern North America: A Reassessment of Epidemic Progress