Keywords: 2,4-D; 2-(2,4-dichlorophenoxy)acetic acid; 2,4,5-T; (2,4,5-trichlorophenoxy)acetic acid; 2,4,5-TP; (RS)2-(2,4,5-trichlorophenoxy)propanonic acid; CI; Confidence interval; DDT; 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane; EPTC; S-ethyl dipropyl(thiocarba