Ohio State University Extension Bulletin

Ornamental Plants
Annual Reports and Research Reviews 2002

Special Circular 189


The Effects of Sprayer Configuration on Efficacy for the Control of Scab on Crabapple

Charles R. Krause, Richard C. Derksen, LeonaE. Horst, Ross D. Brazee, Michael G. Klein, and MichaelE. Reding, U.S. Department of Agriculture, Agricultural Research Service, Application Technology Research Unit, Ohio Agricultural Research and Development Center (OARDC), The Ohio State University, Wooster, Ohio; Randall Zondag, Ohio State University Extension, Lake County.

Materials and Methods

Disease Evaluation

Disease incidence ratings based on a modified Horsfall-Barrett Scale were taken each month during spray treatments.

Weather Stations

A portable meteorological station (Campbell Scientific Instruments) was installed within the experimental plot to remotely monitor air temperature, leaf wetness, relative humidity, wind speed and direction, rainfall, and solar radiation, according to guidelines of the United States National Oceanic and Atmospheric Administration.


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