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The organophosphate (OP) insecticides diazinon and chlorpyrifos have been frequently detected in the San Joaquin River, California, USA. Irrigation tail waters are a significant source of OP pesticides in the watershed. This study tested several management practices for reducing offsite movement of chlorpyrifos to surface water from flood irrigated alfalfa.(More)
Several studies have indicated that certain pesticides are present in California rivers at levels which could be harmful to aquatic life. Generally, these studies have been conducted during certain seasons, but not year-round. Since year-round pesticide concentration data was limited for many California rivers having significant amounts of agricultural(More)
A novel scheme using artificial neural networks to automate the vibration monitoring method of detecting the occurrence and location of damage in offshore jacket platforms is presented. A multiple neural network system is adopted which enables the problem to be decomposed into smaller ones, facilitating easier solution. An adaptive resonance theory (ART)(More)
In 1999, the Department of Pesticide Regulation (DPR) entered into an interagency agreement with the California Department of Food and Agriculture (CDFA) to monitor pesticide treatments for Red Imported Fire Ant (RIFA) control. The objective of the monitoring was to develop data on potential concentrations of bifenthrin, fenoxycarb, hydramethylnon,(More)