| contamination of bovine (buffalo, bubalus bubalis (l.)) milk from indoor use of ddt and hch in malaria control programmes. | samples of bovine (buffalo, bubalus bubalis (l.)) milk collected from randomly selected houses of ludhiana and sangrur districts of punjab, india, where ddt and hch, respectively, had been sprayed for the control of malaria, were analysed for insecticide residues between september 1985 and june 1986. the average concentration of ddt residues in samples from the ddt sprayed area were approximately 4-12 times higher than those in the corresponding samples from hch sprayed areas. mean levels of hch ... | 1989 | 2480640 |