Persistence behaviour of fungicide mixture (Benalaxyl-M 4% + Mancozeb 65%) WP in grapes.

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作   者：

Chiranjit Kundu;  Anjan Bhattacharyya;  Arnab Goon; 

作者机构：

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

关键词：

Persistence;  Benalaxyl-M;  Dissipation;  Susceptible; 

期刊名称：

Bulletin of Environmental Contamination and Toxicology

i s s n：

0007-4861

年卷期：

2012 年 89 卷 6 期

页   码：

1253-1257

页   码：

摘   要：

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.