Weed Management Handbook

A finely ground herbicide powder that will dissolve in water.

A two-phase concentrate that contains solid herbicide suspended in liquid that is capable of suspension in water.

A compound is volatile when it evaporates or vaporizes (changes from liquid to a gas) at ordinary temperatures on exposure to the air.

The movement of vapors from the area of application to other areas.

Transfer of sugars or other materials such as 2,4-D from one part to another in plants. (See Systemic.)

Poisonous; injurious to animals and plants through contact or systemic action.

Treatment of a localized surface site such as a single leaf blade, petiole, or growing point.

Capable of withstanding effects. For example, grass is tolerant of 2,4-D to the extent that this herbicide can be used selectively to control broadleaf weeds without killing the grass.

The amount of pesticide chemical allowed by law to be in or on a plant or animal product sold for human consumption.

A compound causing congenital malformations in the fetus (birth defects).