Herbicides ua haujlwm los ntawm kev cuam tshuam nrog cov txheej txheem physiological thiab biochemical ntawm cov nroj tsuag los ntawm cov tshuaj lom neeg, ua rau lawv tuag lossis kev loj hlob inhibition. Cov txheej txheem ntawm kev txiav txim ntawm herbicides muaj ntau haiv neeg, feem ntau suav nrog cov hauv qab no:
1. cuam tshuam nrog photosynthesis: Piv txwv li, triazine herbicides thaiv cov photosynthetic electron thauj saw, ua rau cov nroj tsuag tuag vim lawv tsis tuaj yeem tsim lub zog;
2. Inhibition ntawm amino acid synthesis: Piv txwv li, glyphosate inhibits EPSP synthase, thaiv cov synthesis ntawm aromatic amino acids;
3. Kev cuam tshuam ntawm cell division: Piv txwv li, dinitroaniline herbicides inhibit microtubule tsim, tiv thaiv cell division;
4. Mimicking cog cov tshuaj hormones: Piv txwv li, 2,4-D overstimulates kev loj hlob, ua rau deformed thiab tuag nroj. Qhov kev xaiv ntawm cov tshuaj tua kab mob yog nyob ntawm qhov sib txawv metabolic ntawm cov qoob loo thiab cov nroj tsuag; non-selective herbicides muaj cov nyhuv tua ntawm tag nrho cov nroj tsuag.
