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The Dissipation of Tebuconazole and Propiconazole in Boronia (Boronia megastigma Nees)


Garland, SM and Davies, NW and Menary, RC, The Dissipation of Tebuconazole and Propiconazole in Boronia (Boronia megastigma Nees), Journal of Agricultural and Food Chemistry, 52, (20) pp. 6200-6204. ISSN 0021-8561 (2004) [Refereed Article]

DOI: doi:10.1021/jf0499323


The broad spectrum, systemic fungicides tebuconazole and propiconazole are used to control rust in boronia (Boronia megastigma Nees). Gas chromatography combined with either a benchtop quadrupole mass spectrometer or a high-resolution mass spectrometer allowed for the monitoring of both pesticides in boronia leaves, flowers, and concrete. Field trials were established at two sites to determine the rate of dissipation of tebuconazole and propiconazole in boronia. At site 1, two application rates of 125 and 250 g active ingredient/hectare (ai/ha) tebuconazole were employed. Treatments were repeated 17 days later. At harvest, 286 days after the final application, tebuconazole was detected at levels of 0.06 ± 0.05 and 0.5 ± 0.1 [mg/kg ± standard error, on a dry matter basis (DMB)] in the leaves collected from plots treated with 125 and 250 g ai/ha of tebuconazole, respectively. The oil produced from the flowers collected at the final harvest had residues of tebuconazole at levels of 0.06 ± 0.03 and 0.10 ± 0.08 mg/kg for the 125 and 250 g ai/ha application rates, respectively. Two repeat applications of 125 g ai/ha propiconazole were also used at site 1. Residues of propiconazole were detected at 0.09 ± 0.03 mg/kg (DMB) 286 days after the final application. At site 2, treatments of 125 g ai/ha of tebuconazole were applied twice. At harvest, 279 days after the final application of tebuconazole, residues were recorded at 0.30 ± 0.09 mg/kg in the leaves (DMB) while the oil produced had 0.20 ± 0.07 mg/kg.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Horticultural production
Research Field:Horticultural crop protection (incl. pests, diseases and weeds)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Horticultural crops not elsewhere classified
UTAS Author:Garland, SM (Dr Sandra Garland)
UTAS Author:Davies, NW (Associate Professor Noel Davies)
UTAS Author:Menary, RC (Professor Robert Menary)
ID Code:29359
Year Published:2004
Web of Science® Times Cited:18
Deposited By:Agricultural Science
Deposited On:2004-08-01
Last Modified:2011-10-12

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