SEDL / STP / STP1183-EB / STP25133S

Physico-Chemical Properties, In-Flight Evaporation and Spread of Spray Droplets Containing Pesticide Adjuvants

Hall, FR
Professor and Head, The Laboratory for Pest Control Application Technology (LPCAT), The Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, Ohio

Thacker, JRM
Post-Doctoral Research Associate, The Laboratory for Pest Control Application Technology (LPCAT), The Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, Ohio

Downer, RA
Research Associate, The Laboratory for Pest Control Application Technology (LPCAT), The Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, Ohio

Pages: 12    Published: Jan 1993

Download this paper for $25 PDF (200K)          View License Agreement
Abstract

In-flight evaporation, droplet spread on water sensitive paper, equilibrium surface tension, and dynamic surface tension were measured for each of 12 adjuvants mixed with water. The correlation between the physico-chemical properties and droplet spread was determined. The results indicated that the adjuvants had significant and varied effects upon the parameters that were measured. Speculative rankings were derived for (A) evaporation rates and (B) spreading potentials. The rankings were compared with manufacturer's claims for the adjuvants and the results are discussed in terms of the benefits to be derived from using these products in pesticide applications.