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Pesticide Information Profiles

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IMAZAQUIN


TRADE OR OTHER NAMES: Trade names for products containing imazaquin include Ala-Scept, Scepter, Squadron, Tri-Scept, and Partner (205, 223).

REGULATORY STATUS: Imazaquin is a general use pesticide with a toxicity classification of III (slightly toxic). Check with specific state regulations for local restrictions which may apply. Products containing imazaquin must bear the signal word "Caution" on their label (223).

CHEMICAL CLASS: imidazole compound

INTRODUCTION: Imazaquin is a imidazole compound used as a selective, pre- and postemergence herbicide. It controls weeds by inhibiting the acetohydroxy acid synthase enzyme responsible for the production of valine, leucine and isoleucine. Activity is first seen in the growing points of susceptible plants where amino acid demands are greatest. The compound is used to control grasses and broadleaved weeds including cocklebur, pigweeds, prickly sida, nightshade, mustard, smartweed, ragweed, velvetleaf, jimsonweed, foxtails, seedling johnsongrass, lambsquarters, sicklepod, morningglory and others. Crops include soybeans, turf and ornamentals (205, 207). When imazaquin is applied to soil, susceptible weeds emerge, growth stops and the weeds either die or are not competetive with the crop. When applied postemergence, adsorption occurs through both the foliage and roots, growth stops and the weeds either die or are not competitive with the crop. When applied preemergence, rainfall or irrigation is necessary to activate imazaquin (324). Imazaquin comes in emulsifiable concentrate and dispersable granule formulations. It is also formulated with other herbicides (207).

TOXICOLOGICAL EFFECTS

ECOLOGICAL EFFECTS

ENVIRONMENTAL FATE

PHYSICAL PROPERTIES AND GUIDELINES

Physical Properties:

Exposure Guidelines:

BASIC MANUFACTURER

American Cyanamid Co.
One Cyanamid Plaza
Wayne, NJ 07470-8426

REFERENCES

References for the information in this PIP can be found in Reference List Number 10


DISCLAIMER: The information in this profile does not in any way replace or supersede the information on the pesticide product label/ing or other regulatory requirements. Please refer to the pesticide product label/ing.