How many herbicide modes of action are there?

(extension circular 130) that is reprinted every year. In this publication all herbicides are listed in their appropriated mode of action. Below is a short description of the 11 most commonly used herbicide modes of action.

How do you classify herbicides?

Herbicides may be classified into families based on how they kill plants (mode of action and site of action) or by chemical similarity. An example of a common commercial herbicide containing the active ingredient is also listed.

What are Group 3 herbicides?

Benzamide, benzoic acid (DCPA), dinitroaniline, phosphoramidate, and pyridine herbicides (Group 3) are examples of herbicides that bind to tubulin, the major microtubule protein.

What is roundups mode of action?

Mode of Action: Glyphosate is absorbed across the leaves and stems of plants and is translocated throughout the plant. It concentrates in the meristem tissue. Plants exposed to glyphosate display stunted growth, loss of green coloration, leaf wrinkling or malformation, and tissue death.

What are herbicides give two examples?

Examples of translocated herbicides are atrazine, glyphosate 2,4-dichlorophenoxyacetic acid (2,4-D) and simazine. Systemic herbicides, like contact herbicides, also have diverse modes of action at the molecular level.

What are the types of herbicides?

The most commonly used compounds are 2,4-D (2,4-Dichlorophenoxyacetic acid); 2,4,5-T (2,4,5-Trichlorophenoxyacetic acid); MCPA (2-Methyl-4-chlorophenoxyacetic acid); and silvex [2-(2,4,5-Trichlorophenoxy)-propionic acid].

What is a herbicide group?

Herbicides are grouped according to family (e.g., triazines), the target site of action or mechanism of action (e.g., Group 5), and mode of action (e.g., Photosynthesis Inhibitor). Herbicides within a family have similar chemical structures and typically the same site or mechanism of action (MOA).

What is the mode of action of 2 4 D?

Mode of Action: 2,4-D is an “auxin mimic” or synthetic auxin. This type of herbicide kills the target weed by mimicking the plant growth hormone auxin (indole acetic acid), and when administered at effective doses, causes uncontrolled and disorganized plant growth that leads to plant death.

Why are herbicides classified by mode of action?

HERBICIDE CLASSIFICATION by MODE OF ACTION (MOA) (effect on plant growth) This chart groups herbicides by their modes of action to assist you in selecting herbicides 1) to maintain greater diversity in herbicide use and 2) to rotate among effective herbicides with different sites of action to delay the development of herbicide resistance. by PREMIX

How many different types of herbicide are used in Oklahoma?

In Oklahoma crop production, 11 different herbicide modes of action are commonly used, and each is unique in the way it controls susceptible plants. Some herbicide modes of action comprise several chemical families that vary slightly in their chemical composition, but control susceptible plants in the same way and cause similar injury symptoms.

How are herbicides classified to support resistance management?

To support the use of herbicides suitable for resistance management the enclosed classification of herbicides is proposed. The herbicides are classified alphabetically according to their target sites, modes of action, similarity of induced symptoms or chemical classes.

Why is it important to rotate herbicide ingredients?

Therefore, it is important to not only rotate herbicide active ingredients but also to rotate modes of action to prevent herbicide-resistance weed populations from developing. One of the most effective ways to rotate herbicide modes of action is through crop rotation.