HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Nations, B.K. Articles by Hallberg, G.R. Search for Related Content PubMed Articles by Nations, B.K. Articles by Hallberg, G.R. Agricola Articles by Nations, B.K. Articles by Hallberg, G.R.

Pesticides in Iowa Precipitation

Iowa Dep. of Natural Resources, Geological Survey Bureau, 109 Trowbridge Hall, Iowa City, IA 52242.

^* Corresponding author.

ABSTRACT

Rainfall was sampled for pesticides to assess their occurrence in precipitation and potential impacts on water resources. Three areas in Iowa were sampled; two localities were in rural settings, and a third in an urban area. Fourteen pesticides, including ten herbicides and four insecticides, were detected from October 1987 through September 1990. Atrazine, alachlor, cyanazine, and metolachlor were the most commonly detected, with one or more of these four herbicides found in almost every rainfall sample during the growing season. Concentrations of individual pesticides ranged from 0.1 µg L^–1 to 40.0 µg L^–1, with most detections under 1.0 µg L^–1. Pesticide detections in rainfall began in April and ended in July or August, probably related to the timing of chemical application and greater volatilization rates during warmer weather. Samples from the urban site had detections of the same agricultural chemicals found at the rural sites, but in lesser quantities. In addition to the commonly detected herbicides, three of the four insecticides detected in rainfall were only found in urban samples. Two of these have urban as well as agricultural uses. Some variation of pesticide detections were seen at the three sampling localities, related to regional and local use patterns. Concentrations were greater at sampling sites near fields where pesticides are applied, suggesting that local volatilization and distance of transport affect the concentrations in rainfall. Pesticide concentrations were highest at the beginning of a rainfall event with concentrations becoming lower in samples taken later in the event.

This work was supported, in part, by a grant from the USEPA, Region VII; and by the Integrated Farm Management Demonstration Project of the Agricultural Energy Management Fund, State of Iowa, through the Iowa Dep. of Agriculture and Land Stewardship, and the Big Spring Basin Demonstration Project, with funds provided through the Iowa Groundwater Protection Act; and through analytical services of the Univ. Hygienic Lab.

Received for publication August 9, 1991.

This article has been cited by other articles:

				L. L. Jackson Who "Designs" the Agricultural Landscape? Landscape Jrnl., January 1, 2008; 27(1): 23 - 40. [Abstract] [PDF]

				T. B. Hayes Welcome to the Revolution: Integrative Biology and Assessing the Impact of Endocrine Disruptors on Environmental and Public Health Integr. Comp. Biol., April 1, 2005; 45(2): 321 - 329. [Abstract] [Full Text] [PDF]

				T. B. Hayes, A. Collins, M. Lee, M. Mendoza, N. Noriega, A. A. Stuart, and A. Vonk Hermaphroditic, demasculinized frogs after exposure to the herbicide atrazine at low ecologically relevant doses PNAS, April 16, 2002; 99(8): 5476 - 5480. [Abstract] [Full Text] [PDF]

				J. E. Barbash, G. P. Thelin, D. W. Kolpin, and R. J. Gilliom Major Herbicides in Ground Water: Results from the National Water-Quality Assessment J. Environ. Qual., May 1, 2001; 30(3): 831 - 845. [Abstract] [Full Text] [PDF]