TY - JA AU - Ammar,I.M.A. TI - Residual bioactivity of insect growth regulators against Sitophilus oryzae (L.) in wheat grain SN - 0340-7330 U1 - 88-092922 PY - 1988/// KW - Juvenile hormones KW - Pesticide persistence KW - Sitophilus KW - Triticum KW - AGROVOC N1 - 3 tables; 13 ref. Summaries (De, En) N2 - Chlorfluazuron, flufenoxuron and XRD-473 were applied to wheat grain as water emulsion at doses of 0.5, 5 and 25 ppm AI. The residual bioactivity and its ability to control infestation of the rice weevil, Sitophilus oryzae (L.) was bioassayed at monthly intervals during 8 months storage period posttreatment. All IGRs at the tested doses produced moderate direct toxicity of 18-56 per cent to parent adult weevils, exposed immediately after treatment, which decreased remarkably to 0-18 per cent for adults exposed to IGRs residues in wheat grain at 3 months posttreatment. Data reveals also that all compounds at 0.5-25 ppm and in particular XRD-473 affected T2 - Anzeiger fuer Schaedlingskunde Pflanzenschutz Umweltschutz ER -