TOXICITY OF THURINGIENSIN ON IMMATURE AND ADULT STAGES OF Tetranychus urticae KOCH AND Panonychus ulmi (KOCH) (ACARINA: TETRANYCHIDAE)

The direct and residual toxicity of thuringiensin on different stages of Tetranychus urticae Koch and Panonychus ulmi (Koch), and the influence on T. urticae reproduction and population development were evaluated in laboratory bioassays. Direct toxicity was higher than residual toxicity to T. urtica...

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Autores principales:	Vargas,Robinson, Chapman,Bruce, Penman,David R.
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2001
Materias:	beta -exotoxin miticide direct toxicity residual toxicity bioassay
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072001000100001
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spelling	oai:scielo:S0365-280720010001000012005-06-09TOXICITY OF THURINGIENSIN ON IMMATURE AND ADULT STAGES OF Tetranychus urticae KOCH AND Panonychus ulmi (KOCH) (ACARINA: TETRANYCHIDAE)Vargas,RobinsonChapman,BrucePenman,David R. beta -exotoxin miticide direct toxicity residual toxicity bioassay The direct and residual toxicity of thuringiensin on different stages of Tetranychus urticae Koch and Panonychus ulmi (Koch), and the influence on T. urticae reproduction and population development were evaluated in laboratory bioassays. Direct toxicity was higher than residual toxicity to T. urticae for all life stages. Immature stages of T. urticae and P. ulmi were more susceptible to thuringiensin than adults. P. ulmi was more susceptible to thuringiensin than T. urticae. Fecundity of T. urticae was significantly reduced when females were exposed to residues for 2 days. Complete suppression of T. urticae population development was achieved when the F1 generation was exposed to thuringiensin residues, however, the level of suppression was concentration dependent. The results suggest that thuringiensin acts in a relatively short time. Therefore, the high toxicity of thuringiensin on immature spider mite stages and the sublethal effects on females suggest that thuringiensin may successfully control field populations. The use of thuringiensin in spider mite control programmes is discussed. Practical suggestions on the development of bioassays for active ingredients of this type are also discussedinfo:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAAgricultura Técnica v.61 n.1 20012001-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072001000100001en10.4067/S0365-28072001000100001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	beta -exotoxin miticide direct toxicity residual toxicity bioassay
spellingShingle	beta -exotoxin miticide direct toxicity residual toxicity bioassay Vargas,Robinson Chapman,Bruce Penman,David R. TOXICITY OF THURINGIENSIN ON IMMATURE AND ADULT STAGES OF Tetranychus urticae KOCH AND Panonychus ulmi (KOCH) (ACARINA: TETRANYCHIDAE)
description	The direct and residual toxicity of thuringiensin on different stages of Tetranychus urticae Koch and Panonychus ulmi (Koch), and the influence on T. urticae reproduction and population development were evaluated in laboratory bioassays. Direct toxicity was higher than residual toxicity to T. urticae for all life stages. Immature stages of T. urticae and P. ulmi were more susceptible to thuringiensin than adults. P. ulmi was more susceptible to thuringiensin than T. urticae. Fecundity of T. urticae was significantly reduced when females were exposed to residues for 2 days. Complete suppression of T. urticae population development was achieved when the F1 generation was exposed to thuringiensin residues, however, the level of suppression was concentration dependent. The results suggest that thuringiensin acts in a relatively short time. Therefore, the high toxicity of thuringiensin on immature spider mite stages and the sublethal effects on females suggest that thuringiensin may successfully control field populations. The use of thuringiensin in spider mite control programmes is discussed. Practical suggestions on the development of bioassays for active ingredients of this type are also discussed
author	Vargas,Robinson Chapman,Bruce Penman,David R.
author_facet	Vargas,Robinson Chapman,Bruce Penman,David R.
author_sort	Vargas,Robinson
title	TOXICITY OF THURINGIENSIN ON IMMATURE AND ADULT STAGES OF Tetranychus urticae KOCH AND Panonychus ulmi (KOCH) (ACARINA: TETRANYCHIDAE)
title_short	TOXICITY OF THURINGIENSIN ON IMMATURE AND ADULT STAGES OF Tetranychus urticae KOCH AND Panonychus ulmi (KOCH) (ACARINA: TETRANYCHIDAE)
title_full	TOXICITY OF THURINGIENSIN ON IMMATURE AND ADULT STAGES OF Tetranychus urticae KOCH AND Panonychus ulmi (KOCH) (ACARINA: TETRANYCHIDAE)
title_fullStr	TOXICITY OF THURINGIENSIN ON IMMATURE AND ADULT STAGES OF Tetranychus urticae KOCH AND Panonychus ulmi (KOCH) (ACARINA: TETRANYCHIDAE)
title_full_unstemmed	TOXICITY OF THURINGIENSIN ON IMMATURE AND ADULT STAGES OF Tetranychus urticae KOCH AND Panonychus ulmi (KOCH) (ACARINA: TETRANYCHIDAE)
title_sort	toxicity of thuringiensin on immature and adult stages of tetranychus urticae koch and panonychus ulmi (koch) (acarina: tetranychidae)
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2001
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072001000100001
work_keys_str_mv	AT vargasrobinson toxicityofthuringiensinonimmatureandadultstagesoftetranychusurticaekochandpanonychusulmikochacarinatetranychidae AT chapmanbruce toxicityofthuringiensinonimmatureandadultstagesoftetranychusurticaekochandpanonychusulmikochacarinatetranychidae AT penmandavidr toxicityofthuringiensinonimmatureandadultstagesoftetranychusurticaekochandpanonychusulmikochacarinatetranychidae
_version_	1718437981758423040

TOXICITY OF THURINGIENSIN ON IMMATURE AND ADULT STAGES OF Tetranychus urticae KOCH AND Panonychus ulmi (KOCH) (ACARINA: TETRANYCHIDAE)

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