In 2016, an onion downy mildew epidemic caused by Peronospora destructor severely damaged the commercial fields in Saga Prefecture, western Japan. To identify factors underlying outbreak, we investigated symptoms of secondary infections and examined P. destructor’s sensitivity to metalaxyl, most effective traditional fungicide used against this pathogen, 2016–2018. Disease developed late March ...

Surface water sampling in 2007-2010 measured the occurrence of carbamates and metalaxyl during base flow conditions and wet weather events in southern Ontario surface waters. Carbaryl, metalaxyl and pirimicarb were the most frequently detected compounds. In 2008 these three compounds were detected in over 50 % of the samples. Overall mean concentrations of carbaryl and metalaxyl over the course...

The enantiomers of metalaxyl acid metabolite (MX-acid) were separated by HPLC using cellulose-tris-(3,5-dimethylphenyl-carbamate) (CDMPC) as chiral stationary phase. The effects of mobile phase composition, flow rate and column temperature on the resolution were investigated and good separation was achieved with n-hexane/2-propanol/trifluoroacetic acid as mobile phase. The circular dichroisms d...

Metalaxyl is a benzenoid fungicide used to control fungal diseases. The aim of this work is to investigate the effect of metalaxyl on haematological and biochemical parameters in male albino mice. In this study, animals were divided into two groups. The animals in the first group (20 mice) were given metalaxyl orally through a stomach tube at a dosage of 1/10 of the LD50 (which was equivalent t...

Improving the existing knowledge on the enantioselectivity of processes affecting chiral pesticide enantiomers in the environment is necessary to maximize the efficacy and minimize the environmental impact caused by the use of pesticides with chiral properties. In this work, the enantioselectivity of the sorption, degradation, and leaching processes of the chiral fungicide metalaxyl in three sl...

Abstract Phytophthora boehmeriae Sawada is an important pathogenic oomycete, and causes blight of cotton ramie, which are main limiting factors to the production ramie in China. The aggressiveness fitness metalaxyl-resistant (MR) mutants P. obtained by inducing on LBA amended with sublethal dose (10 µg·mL −1 ) metalaxyl were studied this paper. results showed that there no significant differenc...

In the present work, different methods were tested to evaluate the adsorption and desorption of metalaxyl in two acid soils with different organic carbon and clay contents. The three methods (batch, stirred flow chamber and column) that were examined produced similar findings when the two soils were compared: (a) the metalaxyl adsorption capacity was higher in the soil with higher organic matte...

Metalaxyl significantly reduced population of Pratylenchus coffeae, Radopholus similis, and Tylenchulus semipenetrans in roots of Citrus limon (rough lemon) under greenhouse conditions. Postinoculation treatment of rough lemon seedlings was not as effective i n reducing nematode populations as was treatment before inoculation. Fewer nematodes infected metalaxyl-treated roots than nontreated roo...

The toxic effects of three agrochemicals (fosthiazate, metalaxyl-M and imidacloprid) and copper were investigated in this study on the crustacean Daphnia magna. Copper was the most toxic tested compound with the lowest EC50 value, equal to 0.11 mg/L. Among the three agrochemicals, fosthiazate was the most toxic with an EC50 value equal to 0.32 mg/L, about two orders of magnitude lower than the ...