Quantitative Analysis of Organic Phosphonates, Phosphonate, and Other Inorganic Anions in Plants and Soil by Using High-Performance Ion Chromatography

Ouimette, D.G.

doi:10.1094/phyto-78-1150

Cited by 23 publications

(9 citation statements)

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“…Fosetyl-Al has a fairly high breakdown rate in soil, hence Ouimette and Coffey (1988) found no fosetyl-Al residues in soil or plants 2 weeks after soil treatment. The requirement for long-term protection in the present disease problem could possibly not be met by this fungicide due to its high breakdown rate in soil.…”

Section: Discussionmentioning

confidence: 84%

Biocontrol ofPythium tracheiphilumin Chinese Cabbage byClonostachys roseaunder Field Conditions

M⊘ller¹,

Jensen²,

Andersen³

et al. 2003

Biocontrol Science and Technology

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Control of leaf and head rot of Chinese cabbage (Brassica campestris L. ssp. pekinensis), caused by Pythium tracheiphilum, was obtained by Clonostachys rosea (isolate IK726) in field trials conducted in 1995 and 1999 on naturally infested land in a commercial crop in Denmark. A significant 2 Á/3-fold disease reduction was obtained at an application rate of 10 8 Á/ 10 9 conidia m (2 (high application rate) in both years, but not at a 10-fold reduced rate in 1999. Disease reduction by Trichoderma harzianum (Supresivit) was almost significant at the high application rate (1 g product m (2 corresponding to 7)/10 9 colony forming units (CFUs) m (2 ) in both years, but not at a 10-fold reduced rate applied in 1999. In both 1995 and 1999 trials, the percentage of marketable heads increased significantly by 10% following a full application rate of C. rosea. Supresivit applied at the full application rate gave a significant 13% yield improvement in 1995 but not in 1999. No yield improvement was found when the two agents were applied at 10-fold reduced rates. A Danish T. harzianum isolate significantly increased yield by 13% in 1995, but gave no disease control. Plant growth promotion may have been responsible for yield improvements obtained by Supresivit and the Danish isolate of T. harzianum. The 1995 trial also evaluated the products Binab T (T. harzianum'/T. polysporum), Mycostop (Streptomyces griseoviridis), Polyversum (P. oligandrum) and Aliette (fosetyl-Al) and Danish isolates of P. oligandrum (2) and T. virens (1), none of which gave disease control or yield effects.

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Section: Discussionmentioning

confidence: 84%

Biocontrol ofPythium tracheiphilumin Chinese Cabbage byClonostachys roseaunder Field Conditions

M⊘ller¹,

Jensen²,

Andersen³

et al. 2003

Biocontrol Science and Technology

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“…These improvements pushed the lower limits of detection down to the picomole range and allowed analysis of milligram amounts of material. Development of H P L C with conductivity detection and ion chromatography allowed rapid and accurate determination and phosphate and phosphonate concentrations in larger samples of plant material (Saindrenan, Darakis & Bompeix, 1985;Smillie et al, 1988;Fenn & Coffey, 1989;Ouimette & Coffey, 1988.…”

Section: Phosphonate Analysis I N Vivomentioning

confidence: 99%

The Complex Action of Phosphonates as Antifungal Agents

1991

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“…Results of this study demonstrated that Pi at 10 ml and 20 ml per liter of water applied at four growth stages (bud break; green cluster; 90% petal fall; early fruitlet) under field conditions significantly reduced the incidence and severity of pear scab. Previous studies have reported that application of Pi to be extremely effective in the management of pathogens, particularly those that belong to the Oomycetes group such as Phytophthora citricola, P. capsici, P. infestans, Peronosclerospora sorghi, Peronospora parasitica in several economically important food crops to include potato, maize, pepper, and crucifers (Ouimette and Coffey 1989;Jackson et al 2000;Wilkinson et al 2001;Miller et al 2006). In addition, phosphite application reduced pathogen severity of several powdery mildews to include Sphaerotheca fuliginea (cucumber powdery mildew), grape powdery mildew, nectarine, and mango powdery mildew (Bécot et al 2000), as well as suppress the bacterial pathogen Pseudomonas syringae pv.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Potassium Phosphite and Myclobutanil Combinations for Pear Scab (Venturia pirina) Suppression

Percival¹,

Noviss²

2010

AUF

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The purpose of this study was to investigate the use of potassium phosphite (Pi) alone and in combination with a reduced dose of synthetic fungicide (myclobutanil) to control pear scab (Venturia pirina) under field conditions. Irrespective of Pi and myclobutanil concentration, no leaf or fruit phytotoxic effects were observed throughout the 2006 and 2007 experiments. In both field experiments, Pi alone significantly reduced the incidence and severity of V. pirina on leaves and fruit compared to water-treated control with the degree of scab reduction similar to that of a reduced dose of myclobutanil. The efficacy of Pi at 20 ml per liter water in inhibiting V. pirina scab incidence and severity was superior than that of Pi at 10 ml per liter water and a reduced dose of myclobutanil in virtually all monthly assessments. Combining a reduced dose of myclobutanil with either Pi at 10 ml or 20 ml per liter significantly improved the efficacy of scab control compared to stand alone applications of each product at most monthly assessments. Data analyzed with Limpel’s formula indicated a positive synergistic effect between Pi and a reduced dose of myclobutanil. Greatest reductions in V. pirina incidence and severity on leaves and fruit were, however, achieved by stand alone applications of myclobutanil at manufacturers recommended strength. Irrespective of year, crown volume, number of fruit per tree, and total fruit yield were higher in Pi and myclobutanil treated trees irrespective of concentration applied compared to water-treated controls. A combined mix of Pi with a reduced dose of myclobutanil proved effective in increasing crown volume, number of fruit per tree and fruit yield compared to stand alone applications of each treatment. Greatest increases in crown volume, number of fruit per tree and fruit yield were achieved by applications of myclobutanil at the manufacturers recommended strength. In virtually all cases, Pi combined with a reduced dose of myclobutanil induced positive synergistic effects on crown volume and fruit yield greater than their additive effects alone. Mean fruit weight per tree were in all cases higher in Pi and myclobutanil treated trees irrespective of concentration applied compared to water-treated controls, however, these differences were not statistically significant in all cases.

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Quantitative Analysis of Organic Phosphonates, Phosphonate, and Other Inorganic Anions in Plants and Soil by Using High-Performance Ion Chromatography

Cited by 23 publications

References 0 publications

Biocontrol ofPythium tracheiphilumin Chinese Cabbage byClonostachys roseaunder Field Conditions

Biocontrol ofPythium tracheiphilumin Chinese Cabbage byClonostachys roseaunder Field Conditions

The Complex Action of Phosphonates as Antifungal Agents

Evaluation of Potassium Phosphite and Myclobutanil Combinations for Pear Scab (Venturia pirina) Suppression

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