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Titolo:
Evaluation of propargyl bromide for control of barnyardgrass and Fusarium oxysporum in three soils
Autore:
Ma, QL; Gan, JY; Becker, JO; Papiernik, SK; Yates, SR;
Indirizzi:
ARS, George E Brown Jr Salin Lab, USDA, Riverside, CA 92507 USA ARS Riverside CA USA 92507 wn Jr Salin Lab, USDA, Riverside, CA 92507 USA Univ Calif Riverside, Dept Nematol, Riverside, CA 92507 USA Univ Calif Riverside Riverside CA USA 92507 atol, Riverside, CA 92507 USA
Titolo Testata:
PEST MANAGEMENT SCIENCE
fascicolo: 9, volume: 57, anno: 2001,
pagine: 781 - 786
SICI:
1526-498X(200109)57:9<781:EOPBFC>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
IONIC ORGANIC-COMPOUNDS; METHYL-BROMIDE; FUMIGANT; IODIDE; EQUILIBRIA; FIELD; WATER;
Keywords:
propargyl bromide; efficacy; barnyardgrass; Fusarium oxysporum; adsorption; degradation; soil;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Gan, JY Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA Univ Calif Riverside Riverside CA USA 92521 verside, CA 92521 USA
Citazione:
Q.L. Ma et al., "Evaluation of propargyl bromide for control of barnyardgrass and Fusarium oxysporum in three soils", PEST MAN SC, 57(9), 2001, pp. 781-786

Abstract

With the scheduled phasing out of methyl bromide, there is an urgent need for alternatives. We evaluated the efficacy of propargyl bromide as a potential replacement for methyl bromide for the control of barnyardgrass (Echinochloa crus-galli) and Fusarium oxysporum in an Arlington sandy loam, a Carsitas loamy sand and a Florida muck soil. Soil was mixed with barnyardgrassseeds or F oxysporum colonized on millet seeds, and treated with propargylbromide at a range of concentrations. The mortality of the fungi and weed seeds was determined after 24 h of exposure at 30 degreesC. The concentrations required to inhibit 50% barnyard seed germination (LC50) were 2.8, 2.4 and 48.5 mug g(-1) in the sandy loam, loamy sand and muck soil, respectively. In contrast, the LC50 values for F oxysporum were 11.2, 10.8 and 182.1 mug g(-1) in the sandy loam, loamy sand and muck soil, respectively. The lowefficacy of propargyl bromide in the muck soil was a result of the rapid degradation and high adsorption of the compound in the soil. The degradationhalf-life (t(1/2)) was only 7 h in the muck soil at an initial concentration of 6.8 mug g(-1) compared to 60 and 67 h in the sandy loam and loamy sand, respectively. The adsorption coefficients (K-d) were 0.96, 0.87 and 5.6 cm(3) g(-1) in the sandy loam, loamy sand and muck soil, respectively. These results suggest that registration agencies should consider site-specific properties in recommending application rates for propargyl bromide. (C) 2001 Society of Chemical Industry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 14:45:38