Nkọwa dị nkenke:
2, 4-D, nnu ya bụ ahịhịa ahịhịa, nke a na-ejikarị eme ihe maka njikwa ahịhịa ahịhịa dị ka Plantago, Ranunculus na Veronica spp. Mgbe dilution, enwere ike iji chịkwaa ahịhịa ahịhịa sara mbara n'ubi ọka bali, ọka wit, osikapa, ọka, millet na Sorghum wdg.