Persistence of diflubenzuron on Appalachian forest leaves after aerial application of dimilin

Using a new method for the analysis of diflubenzuron, the active ingredient in the pesticide Dimilin, the persistence of diflubenzuron on leaves of 20 Appalachian forest trees of 7 species was studied throughout the 1991 season after aerial application of the pesticide. Composites were made from lea...

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Bibliographic Details
Published in:	Journal of agricultural and food chemistry Vol. 41; no. 11; pp. 2184 - 2190
Main Authors:	Wimmer, Mary J, Smith, Robert R, Wellings, Deborah L, Toney, Steven R, Faber, David C, Miracle, Jerry E, Carnes, Jason T, Rutherford, Aaron B
Format:	Journal Article
Language:	English
Published:	Washington, DC American Chemical Society 01-11-1993
Subjects:	Agrochemicals products Animal, plant and microbial ecology APLICACION AEREA Applied ecology ARBOLES FORESTALES ARBRE FORESTIER Biological and medical sciences DIFLUBENZURON Ecotoxicology, biological effects of pollution Effects of pollution and side effects of pesticides on plants and fungi EPANDAGE AERIEN FEUILLE Fundamental and applied biological sciences. Psychology HOJAS INSECTICIDAS INSECTICIDE Invertebrates Pesticides used against invertebrates Phytopathology. Animal pests. Plant and forest protection Pollution effects and side effects of agrochemicals on crop plants and forest trees. Other anthropogenic factors Pollution effects. Side effects of agrochemicals RESIDU RESIDUOS VIRGINIE OCCIDENTALE WEST VIRGINIA West Virginia Appalachians United States North America America Analytical chemistry Agricultural chemical product Forests Chemical analysis Insecticide Ecotoxicology Pesticides pesticide fate Plant leaf Sampling design Persistence Gas chromatography Analysis method Residue Forestry Ureas Hardwood forest tree Mass spectrometry Aerial application Canopy(vegetation) Method study
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Summary:	Using a new method for the analysis of diflubenzuron, the active ingredient in the pesticide Dimilin, the persistence of diflubenzuron on leaves of 20 Appalachian forest trees of 7 species was studied throughout the 1991 season after aerial application of the pesticide. Composites were made from leaf samples of each the upper and lower tree canopies, and replicate subsamples were analyzed for diflubenzuron concentration. The two values closely agreed, confirming composite homogeneity and precision of the analytical method. Growth dilution of diflubenzuron during this study was negligible. A significant loss of diflubenzuron from the foliage, ranging from 20% to 80%, was observed within the first 3 weeks after application. The remaining diflubenzuron was generally found to persist for the rest of the growing season until leaf fall, at which 13 of the 20 trees retained more than 20% of the original pesticide applied. The remaining seven trees, consisting of all five yellow poplars and two black oaks, showed from 5% to 20% diflubenzuron retention, primarily due to a greater initial crop. At leaf fall, the residual diflubenzuron is delivered along with the leaves to the streams and the ground litter underlying the canopy
Bibliography:	T01 9509678 ark:/67375/TPS-38MXQN9T-G istex:F50507D22D54C24F1781DCC67B2DFE7E7D1129AC ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0021-8561 1520-5118
DOI:	10.1021/jf00035a069