Threat temperature

The threat temperature is a simple model that can be used to help predict when pests might be active. Once the threat temperature has been reached for a specific pest, scouting should be intensified. Threat temperature can also be used to trigger preventive applications for cryptic diseases such as summer patch. For example, once the threat temperature exceeds 65 F (18 C) summer patch becomes more active and management steps are needed if there is a history of summer patch…