What weather conditions could lead to herbicide failure?

Herbicide failure can often occur under extreme weather conditions, particularly when temperatures are excessively high, or when it is too dry or too cold. High temperatures can lead to rapid evaporation of the herbicide before it has a chance to effectively penetrate the target plant tissue, while dry conditions can inhibit the absorption of the herbicide into the plant. Conversely, cold temperatures may slow down the metabolic processes within the plant, affecting its ability to take up and respond to the herbicide.

Each of these environmental factors can hinder the effectiveness of the herbicide, leading to poor weed control results. Thus, understanding how extreme temperatures and adverse weather affect herbicide performance is crucial for pest control strategies.