Chronic pesticide impacts spotlighted by Agency research

Agricultural pesticides leach into watercourses at sufficient concentrations and frequency to cause chronic effects on wildlife in headwater streams, an innovative research project has demonstrated.1 Researchers also found that occasional higher pesticide levels caused by spray drift add to the degradation of plant and animal communities. Pesticide adjuvants can also be important causes of toxicity, and nonyl phenol, a breakdown product of detergents used in pesticide formulations, was detected at levels exceeding environmental quality standards.

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