FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSIN

The effects of temperature, host plant, active ingredient mobility, surfactant, residue age and larval age on the response of Tetranychus urticae Koch to thuringiensin were evaluated in laboratory bioassays. T. urticae larvae were significantly more susceptible to thuringiensin at 13°C than at 28°C....

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Autores principales:	Vargas,Robinson, Chapman,Bruce, Penman,David R.
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2002
Materias:	beta -exotoxin miticide bioassay pesticide residue age surfactant translocation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072002000100001
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spelling	oai:scielo:S0365-280720020001000012005-05-31FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSINVargas,RobinsonChapman,BrucePenman,David R. beta -exotoxin miticide bioassay pesticide residue age surfactant translocation The effects of temperature, host plant, active ingredient mobility, surfactant, residue age and larval age on the response of Tetranychus urticae Koch to thuringiensin were evaluated in laboratory bioassays. T. urticae larvae were significantly more susceptible to thuringiensin at 13°C than at 28°C. A significantly different response of T. urticae larvae to thuringiensin residues was found on peach and apple leaves. Older T. urticae larvae were significantly more susceptible than younger larvae when exposed to thuringiensin residues. No systemic or translaminar effects of thuringiensin were detected; the leaf surface (upper or lower) and the addition of Silwet L-77 surfactant did not affect the efficacy of thuringiensin. The use of thuringiensin in spider mite control programmes is discussed. Practical suggestions on the development of bioassays for active ingredients to assess the effects of environmental factors of this type are also discussed.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAAgricultura Técnica v.62 n.1 20022002-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072002000100001en10.4067/S0365-28072002000100001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	beta -exotoxin miticide bioassay pesticide residue age surfactant translocation
spellingShingle	beta -exotoxin miticide bioassay pesticide residue age surfactant translocation Vargas,Robinson Chapman,Bruce Penman,David R. FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSIN
description	The effects of temperature, host plant, active ingredient mobility, surfactant, residue age and larval age on the response of Tetranychus urticae Koch to thuringiensin were evaluated in laboratory bioassays. T. urticae larvae were significantly more susceptible to thuringiensin at 13°C than at 28°C. A significantly different response of T. urticae larvae to thuringiensin residues was found on peach and apple leaves. Older T. urticae larvae were significantly more susceptible than younger larvae when exposed to thuringiensin residues. No systemic or translaminar effects of thuringiensin were detected; the leaf surface (upper or lower) and the addition of Silwet L-77 surfactant did not affect the efficacy of thuringiensin. The use of thuringiensin in spider mite control programmes is discussed. Practical suggestions on the development of bioassays for active ingredients to assess the effects of environmental factors 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	FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSIN
title_short	FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSIN
title_full	FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSIN
title_fullStr	FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSIN
title_full_unstemmed	FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSIN
title_sort	factors influencing the responses of tetranychus urticae koch (acarina: tetranychidae) to thuringiensin
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2002
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072002000100001
work_keys_str_mv	AT vargasrobinson factorsinfluencingtheresponsesoftetranychusurticaekochacarinatetranychidaetothuringiensin AT chapmanbruce factorsinfluencingtheresponsesoftetranychusurticaekochacarinatetranychidaetothuringiensin AT penmandavidr factorsinfluencingtheresponsesoftetranychusurticaekochacarinatetranychidaetothuringiensin
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FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSIN

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