A Microcomputer-Based Instrument to Predict Primary Apple Scab Infection Periods
- 1 January 1980
- journal article
- research article
- Published by Scientific Societies in Plant Disease
- Vol. 64 (1) , 69-72
- https://doi.org/10.1094/pd-64-69
Abstract
An electronic instrument was constructed to monitor temperature, leaf wetness and relative humidity in apple orchards and was programmed to predict apple scab [Venturia inaequalis] infection periods. It accurately predicted the minimum conditions for primary infection, as determined by disease development on small apple trees exposed to high densities of ascospore inoculum during 8 wetting periods. The effects of relative humidities of .gtoreq. 90% after wetting periods, the effects of sequential wetting periods, and Mills'' table were used to make the predictions. The disease control obtained by eradicant schedules timed with the instrument and by protectant schedules applied at a standard time interval commonly used by apple growers did not differ significantly.This publication has 1 reference indexed in Scilit:
- Glasshouse experiments on apple scab I. Foliage infection in relation to wet and dry periodsAnnals of Applied Biology, 1964