Open AccessTOXICITY OF INSECTICIDES TO TRIOXYS COMPLANATUS QUILIS (HYMENOPTERA: BRACONIDAE) IN LUCERNE
Author(s) -
Franzmann B. A.,
Rossiter P. D.
Publication year - 1981
Publication title -
australian journal of entomology
Language(s) - English
Resource type - Journals
eISSN - 1440-6055
pISSN - 1326-6756
DOI - 10.1111/j.1440-6055.1981.tb01054.x
Subject(s) - biology , acephate , methomyl , methidathion , dimethoate , toxicology , carbaryl , pirimicarb , endosulfan , chlorpyrifos , monocrotophos , agronomy , pesticide
Residues of field applications of insecticides (in g a. c./ha) on lucerne remained toxic to adult Trioxys complanatus for the following number of days: 1–2 for dimethoate (75) and trichlorphon (840), 2–3 for carbaryl (840) and phosphamidon (100), 3–7 for chlorpyrifos (250) and methidathion (350), > 7 for monocrotophos (100). Residues of demeton‐S‐methyl (75), endosulfan (350), pirimicarb (75) and thiometon (75) were not toxic at 1 d after treatment. Emergence of T. complanatus was recorded from mummies on lucerne sprayed in the field with 13 insecticides (the 11 previous plus acephate (750) and methomyl (300)). Only chlorpyrifos (250) and methidathion (350) produced significant mortality of parasites within mummies of 28.6% and 46.8% respectively. The results are discussed in relation to the selection of insecticides for use in the integration of chemical and biological control of the parasite's host, Therioaphis trifolii (Monell) f. maculata.