Environmental persistence and impact of diflubenzuron in a forest aquatic environment following aerial application

• Published in: Archives of environmental contamination and toxicology Vol. 20; no. 3; pp. 313 - 324
• Main Authors: SUNDARAM, K. M. S, HOLME, S. B, KREUTZWEISER, D. P, SUNDARAM, A, KINGSBURY, P. D
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer-Verlag 01-04-1991; Berlin; New York, NY
• Subjects: Applied sciences; Atmospheric pollution; Exact sciences and technology; Freshwater; Pollution; Canada, Ontario; Aquatic environment; Forests; Organic perhalocompound; Chlorine Organic compounds; Environment impact; Pesticides; Benzenic compound; Ureas; Aromatic compound; Fluorine Organic compounds; Experimental study; Aerial application
• ISSN: 0090-4341; 1432-0703
• DOI: 10.1007/BF01064396

Residue levels and persistence of the insecticide diflubenzuron in forest pond and stream water, sediment and aquatic plants were monitored following spray applications at a rate of 70 g active ingredient per ha, the maximal operational dosage rate for Canadian forestry. Three volume rates of application were employed, 10, 5 and 2.5 litres per ha. Biological effects on non-target arthropod communities in contaminated ponds were studied. In all cases the duration of detectable residues was less than 2 weeks. Significant post-spray mortality occurred in 2 groups of caged macroinvertebrates, amphipoda and immature corixidae. Three taxa of littoral insects were reduced in abundance after treatment, but recovered in numbers by the end of the season. There are 42 references.