title: Acute toxicity of endosulfan and malathion on Chironomus ramosus (Insecta: Diptera: Chironomidae) from north Cachar hills, Assam, India.
abstract: Acute toxicity tests for the pesticides endosulfan and malathion on the larvae of Chironomus ramosus were conducted. Median Lethal Concentration (LC50) values of endosulfan were 0.55 x 10(-2), 0.16 x 10(-2), 0.089 x 10(-2) and 0.036 x 10(-2) ppb respectively, while those for malathion were 0.139 x 10(-2), 0.054 x 10(-2), 0.019 x 10(-2) and 0.0032 x 10(-2) ppb respectively, at 24, 48, 72 and 96 hr. Thus Chironomus ramosus larvae were more sensitive to malathion at all hours of toxicity tests than endosulfan.
authors.affiliation: Department of Zoology, Haflong Government College, Haflong, India. taramaj@yahoo.co.in
authors.forename: T N
authors.initials: TN
authors.lastname: Majumdar
authors.forename: A
authors.initials: A
authors.lastname: Gupta
mesh_terms: D000818:Animals; D002683:Chironomidae / Q000187:drug effects* / Q000378:metabolism; D004726:Endosulfan / Q000633:toxicity*; D004784:Environmental Monitoring; D007194:India; D007306:Insecticides / Q000633:toxicity*; D007814:Larva / Q000187:drug effects; D008294:Malathion / Q000633:toxicity*; D023382:Toxicity Tests, Acute
chemical_list: D007306:Insecticides; D004726:Endosulfan; D008294:Malathion