caa a22 4500 388035862 CHVBK 20180307125004.0 cr unu---uuuuu 161130e199812 xx s 000 0 eng 10.1017/S0007485300054262 doi S0007485300054262 pii (NATIONALLICENCE)cambridge-10.1017/S0007485300054262 An unconventional use of piperonyl butoxide for managing the cotton whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae) [Elektronische Daten] Bemisia tabaci (Gennadius) is a pest of global importance which resists many conventional insecticides. Novel strategies for control are required and these may incorporate compounds whose lethal and sublethal effects have gone unremarked. Although most commonly employed as an insecticide synergist, piperonyl butoxide alone was lethal to predominantly second instar nymphs of the cotton whitefly, B. tabaci at LC50s of between 60 and 600 ppm, depending on the strain. Formulated and technical material were similarly toxic and far more so than detergents. Some strains exhibited slight tolerance (c. 3-10 fold) but there was no correlation of this with the presence of known resistance mechanisms or enzyme banding patterns. Residues of piperonyl butoxide alone were toxic to adult B. tabaci at c. 2000 ppm which was similar to the toxicity of paraffin oil. Piperonyl butoxide also increased developmental times among B. tabaci nymphs at doses as low as 10 ppm and exerted a transient effect on oviposition. There was strong evidence that it did not reduce the feeding activity of insects surviving treatment. Such effects offer scope for incorporating this compound into resistance management programmes, especially in conjunction with natural enemies (e.g, parasitoids active specifically against immature hosts). Copyright © Cambridge University Press 1998 Devine G.J. Biological and Ecological Chemistry Department, IACR-Rothamsted, Harpenden, Hertfordshire, AL5 2JQ, UK Denholm I. Biological and Ecological Chemistry Department, IACR-Rothamsted, Harpenden, Hertfordshire, AL5 2JQ, UK Bulletin of Entomological Research Cambridge University Press 88/6(1998-12), 601-610 0007-4853 88:6<601 1998 88 BER https://doi.org/10.1017/S0007485300054262 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0007485300054262 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Devine G.J. Biological and Ecological Chemistry Department, IACR-Rothamsted, Harpenden, Hertfordshire, AL5 2JQ, UK NATIONALLICENCE 700 1- Denholm I. Biological and Ecological Chemistry Department, IACR-Rothamsted, Harpenden, Hertfordshire, AL5 2JQ, UK NATIONALLICENCE 773 0- Bulletin of Entomological Research Cambridge University Press 88/6(1998-12), 601-610 0007-4853 88:6<601 1998 88 BER CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge