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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/20705

Title: FACTORS INFLUENCING THE RESPONSES OF Tetranychus urticae Koch (ACARINA: TETRANYCHIDAE) TO THURINGIENSIN (Factores que influyen en la respuesta de Tetranychus urticae Koch (Acarina: Tetranychidae) a thuringiensin)
Authors: Vargas, Robinson
Chapman, Bruce
Penman, David R.
Keywords: b -exotoxin, miticide, bioassay, pesticide, residue age, surfactant, translocation
b -exotoxin, acaricida, bioensayo, pesticida, residuo, surfactante, translocación
Issue Date: 31-Dec-2002
Publisher: Instituto de Investigaciones Agropecuarias, INIA
Citation: Agricultura Técnica (ISSN: 0365-2807) Vol 62 Num 1
Abstract: 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.
URI: http://hdl.handle.net/1807/20705
Other Identifiers: http://www.bioline.org.br/abstract?id=at02001
Rights: Copyright 2002 - Instituto de Investigaciones Agropecuarias, INIA (Chile)
Appears in Collections:Bioline International Legacy Collection

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