As usually applied, herbicides can create serious problems with drift, killing plants not intended. Even on calm days, sprays of these materials can be detected surprising distances away, and damage may occur a mile or more from point of application. Danger can also arise from the use of lawn conditioners which contain herbicides such as 2,4-D, and 2,4,5-T in granular form. In hot weather these can volatilize and affect susceptible plants nearby.