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Persistence Behaviour of Fungicide Mixture (Benalaxyl-M 4% + Mancozeb 65%) WP in Grapes

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Abstract

Benalaxyl-M [methyl N-phenylacetyl-N-2, 6-xylyl-dl-alaninate] is a newly introduced phenyl-amide fungicide whereas Mancozeb is one of the member of ethylenebisdiothiocarbamate (EBDC) fungicide. Benalaxyl-M in combination with Mancozeb effectively controls downy mildew of grapes. A two season field trial was conducted under West Bengal climatic condition during 2009–2010 to evaluate the dissipation pattern of fungicide mixture (Benalaxyl-M 4 % + Mancozeb 65 %) WP in grapes at two application rates (2,750 g and 5,500 g ha−1). The quantitative analysis was performed using liquid chromatography–mass spectrometry (LC–MS/MS) and UV–Vis spectrophotometer for Benalaxyl-M and Mancozeb residues respectively. Following the first order kinetics the fungicide Benalaxyl-M dissipates in grapes with half-life (T1/2) value ranges between 2.59 and 2.79 days irrespective of seasons and doses. The dissipation pattern of Mancozeb also follows first order kinetics with half-life (T1/2) value ranges between 3.86 and 4.93 days irrespective of seasons and doses.

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Authors and Affiliations

  1. Pesticide Residue Laboratory, Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur Nadia, 741252, West Bengal, India

    Chiranjit Kundu, Arnab Goon & Anjan Bhattacharyya

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  1. Chiranjit Kundu
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  2. Arnab Goon
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  3. Anjan Bhattacharyya
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Correspondence to Anjan Bhattacharyya.

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Kundu, C., Goon, A. & Bhattacharyya, A. Persistence Behaviour of Fungicide Mixture (Benalaxyl-M 4% + Mancozeb 65%) WP in Grapes. Bull Environ Contam Toxicol 89, 1253–1257 (2012). https://doi.org/10.1007/s00128-012-0847-9

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  • DOI: https://doi.org/10.1007/s00128-012-0847-9

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