The Use of Electron Beam Analysis to Determine the Deposition of Chlorothalonil Smoke Particles in a Greenhouse
Electron beam analysis (EBA) was used to measure chlorothalonil smoke particles on artificial target surfaces in greenhouses. Particles between 0.4 μm (0.000016 in) and 3.0 μm in diameter were found to vary significantly in number with location within a poinsettia canopy and with distance from the source of the smoke. Particles did not vary significantly in size either within the canopy or with distance from the source. No measurable residue was found when the greenhouse was not tightly sealed. EBA proved to be a viable method of investigating fungicide smoke deposition and can provide precise information about the environmental fate of pesticides related to application technology.Abstract
Contributor Notes
In partial fulfillment of a Masters of Science degree from The Ohio State University by the senior author. Supported in part by grants from The Horticultural Research Institute, 1250 I Street, N.W., Suite 500, Washington, D.C. 20005 and the National Pesticide Impact Assessment Program. The authors wish to express their appreciation to Ms. Leona E. Horst and Mr. Matthew S. Krause for their technical assistance and to Mr. Justin Marotta, Possum Run Greenhouse, Bellville, OH.
2Plant pathologists.
3Plant Health Advisory Services, Worthington, OH.