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Pure Appl. Chem., Vol. 72, No. 11, pp. 2199-2218, 2000.

CHEMISTRY AND THE ENVIRONMENT DIVISION

COMMISSION ON AGROCHEMICALS AND THE ENVIRONMENT

Foliar Interception and Retention Values after Pesticide Application. A Proposal for Standardized Values for Environmental Risk Assessment (Technical Report)

J. Linders1, H. Mensink1, G. Stephenson2, D. Wauchope3, and K. Racke4

1RIVM-CSR, P.O. Box 1, NL-3720 BA Bilthoven, The Netherlands; 2University of Guelph, Guelph, ON N1G 2W1, Canada; 3USDA-Agricultural Research Service, P.O. Box 748, Tifton, GA 31794, USA; 4Dow Agrosciences, 9330 Zionsville Road, Indianapolis, IN 46268, USA

Abstract: In performing risk assessments for plant protection products by applicants or regulators in relation to the registration of the products, an important aspect to take into account is the foliar interception and retention of the active substance of the product on the plant. An overview is given of the approaches to this item in several parts of the world. The relevant circumstances and influencing variables, such as growth phase, planting density, and some physicochemical characteristics (e.g., vapor pressure and Henry's coefficient) are dealt with. Finally, a proposal is presented for how to take into account the phenomenon of foliar interception and retention in the initial phase, first tier, of the risk assessment process.

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