ΣDDT and ΣALD were used extensively, ΣHCH only moderately, while, the use of ΣCHL was from mining. The illegal use of β-endosulphan to control the golden apple snail
ΣDDT and ΣALD were used extensively, ΣHCH only moderately, while, the use of ΣCHL was from mining. The illegal use of β-endosulphan to control the golden apple snail