What does ALS mean?<BR>Acetolactate synthase (ALS) <BR> <BR>Acetohydroxyacid synthase (AHAS) <BR> <BR>chloroplast enzyme needed to form certain amino acids <BR>Valine, leucine, isoleucine <BR> <BR>Herbicide families <BR>Imidazolinones <BR>Sulfonylureas <BR>Sulfonanalides <BR>benzoates<BR>