At what temperature should the application of pesticides to foliage be stopped to ensure safety?

Stopping the application of pesticides to foliage at 85°F is important for safety reasons primarily due to the potential for increased plant stress and the risk of pesticide volatility. When temperatures exceed this threshold, plants can become more sensitive to chemical applications, which might result in injury to the plants or reduced efficacy of the pesticide. Additionally, higher temperatures can exacerbate the evaporation of some pesticide formulations before they've had a chance to settle and adhere to the target surfaces, leading to environmental concerns and potential exposure risks. Therefore, 85°F serves as a precautionary guideline to protect both the plants being treated and the surrounding environment from adverse effects associated with higher temperatures during pesticide applications.