Overuse of pesticides has resulted in environmental problems, threating public health through accumulation in food chains. Phytoremediation is a powerful technique to clean up contaminated environments. However, it is necessary to unravel the metabolic mechanisms underlying phytoremediation in order to increase the efficiency of this process. Therefore, growth, physiological and biochemical res...

Tiga fungisida serap yang baru iaitu Aliette (efosite-Al), Ridomil (metalaxyl) serta Ridomil MZ (metalaxyl dengan mancozeb) dan dua fungisida biasa Terrazole (etridiazole) serta Difolatan (captafol) telah diuji kesan profilaktik dan terapeutik ke atas Phytophthora palmivora pada orkid. Pucuk-pucuk punca haibrid Aranda Christine dapat dikawal dengan berkesan daripada jangkitan Phytophthora apabi...

Degradation of xenobiotics by microbial populations is a potential method to enhance the effectiveness of ex situ or in situ bioremediation. The purpose of this study was to evaluate the impact of repeated metalaxyl and folpet treatments on soil microbial communities and to select soil fungal strains able to degrade these fungicides. Results showed enhanced degradation of metalaxyl and folpet i...

ABSTRACT We developed and tested regression methods to exploit the variability in disease inherent in field experiments, and applied the methods to evaluate strains of Bacillus cereus for biocontrol efficacy. Four B. cereus strains were tested for their effect on alfalfa (Medicago sativa) performance in 16 field trials planted during 1993 to 1996 at multiple sites in Wisconsin. To evaluate perf...

The degradation of various formulations of the racemic mixture and the enantiomers (including mefenoxam) of metalaxyl in typical soils from Germany and Cameroon in controlled incubation experiments was studied. The kinetics of the degradation or transformation was determined by means of reversed phase HPLC, while the enantiomeric ratios were measured by HPLC with a chiral Whelk O1 column. The d...

The separation of chiral transformation products greatly complements the understanding of the stereochemistry of chiral pollutants. In this study, direct enantiomeric resolution of metalaxyl and its main degradation product metalaxyl acid, often co-occurring in the environment, was carried out in normal-phase high-performance liquid chromatography with a Chiralcel OJ-H column. (R)-Metalaxyl aci...

A collection of 67 isolates of Phytophthora ramorum from the United States (U.S.), European Union (EU), and Canada was screened using differences in phenotypic traits (pathogenicity, growth rate at several temperatures, and sensitivity/resistance to metalaxyl, dimethomorph, and streptomycin) and for presence of cytoplasmic elements (dsRNA and plasmids). Results of these tests showed a high leve...

24 25 Laboratory and field experiments were conducted to assess how the addition of oleate26 modified hydrotalcite (clay) and biochar (BC) to an agricultural soil affected the sorption, 27 leaching, persistence, and enantiomeric composition of soil residues of two chiral fungicides, 28 tebuconazole and metalaxyl. Laboratory experiments showed that the sorption of both 29 fungicides ranked as fo...