A material used to kill weeds; in cotton usually characterized by timing: "PPI" - prior to planting and incorporated, "pre" - prior to plant emergence from soil, and "post" - after plant emergence, or by application type: "broadcast" - applied evenly over an area, "banded" - applied over a portion of total area, or "directed" - targeted at a specific area, usually toward the base of the cotton plant.
A pesticide designed to control or kill plants, weeds, or grasses. Almost 70% of all pesticide used by farmers and ranchers are herbicides. These chemicals have wide-ranging effects on non-target species.
Synthetic herbicides are toxic, not only to the weeds they are intended for, but also to soil microoganisms, beneficial insects, animals (including humans), and our water supply. They are also unnecessary. Weeds can be effectively controlled by manual weeding, cover crops, and mulching. The last two do double duty by also improving the soil. On a small scale, boiling water can work wonders; boiling water with salt added can help prevent weeds from growing in paths and driveways.
Any approved chemical or others preparation used to control unwanted vegetation. Also called pesticide, phytocide, silvacide. Opponents of herbicide usage will commonly use loose terms like poisons or chemicals.
Chemical that destroys plant life. Categories include narrow vs. broad spectrum; systemic or translocated vs. contact; persistent vs. non-persistent; and preplant, preemergence, and postemergence types.
A chemical used to kill plants or inhibit their growth. Herbicides can be selective (kills some plants but not others) or non-selective. They can affect the whole plant, or only part of a plant, at particular stages of development.
A pesticide formulated to inhibit growth of or kill plants. Non-selective herbicides work on may different types of plants, while selective herbicides are specific to a selected group of plant species.
A substance that kills plants and is used to control weeds. Herbicides vary in their specificity. Some kill a broad spectrum of plant species, while others kill only specific species or groups of species.
A chemical effective at killing plants. Widely used in agriculture, horticulture and gardening to control unwanted plants (referred to as weeds). Herbicides can be selective, killing only some plant species or a group of plants, or non-selective (sometimes called broad spectrum) – which are generally poisonous to all plants.
A herbicide is a pesticide used to kill unwanted plants. Selective herbicides kill certain targets while leaving the desired crop relatively unharmed. Some of these act by interfering with the growth of the weed and are often based on plant hormones. Herbicides used to clear waste ground are nonselective and kill every plant with which they come into contact.
A chemical used for killing-off invasive plant species that might reduce crop yields. Used in non-organic/modern farming practice and may result in chemical residues being found in the products (food, skin care, cosmetics, etc.) manufactured using the crop that has been sprayed with it.