Open AccessTOXICITY OF INSECTICIDES TO COCCINELLA REPANDA THUNBERG (COLEOPTERA: COCCINELLIDAE)
Author(s) -
Kay I. R.
Publication year - 1980
Publication title -
australian journal of entomology
Language(s) - English
Resource type - Journals
eISSN - 1440-6055
pISSN - 1326-6756
DOI - 10.1111/j.1440-6055.1979.tb00845.x
Subject(s) - pirimicarb , dimethoate , biology , monocrotophos , phosphamidon , toxicology , endosulfan , chlorpyrifos , coccinellidae , coccinella septempunctata , predator , predation , agronomy , pesticide , ecology
Coccinella repanda larvae and adults were tested by topical application to determine their tolerance levels to nine insecticides. Based on 48 hour LD50 values the ascending order of toxicity to larvae was endosulfan, pirimicarb, thiometon, formothion. chlorpyrifos, demeton‐S‐methyl, dimethoate, phos‐phamidon and monocrotophos, and to adults the order was endosulfan, pirimicarb, formothion, chlorpyrifos, thiometon, demeton‐S‐methyl, phosphamidon, dimethoate and monocrotophos. The study was conducted as an aid in developing pest management programmes for Therioaphis trifolii f. maculata and Acrythosiphon kondoi in lucerne as C. repanda is an important predator of the aphids.