ISHS Acta Horticulturae 562: III International Symposium on Sensors in Horticulture
FIBER-OPTIC LEAF-WETNESS SENSOR: CANOPY CONDENSATION WARNING FOR GREENHOUSES |
| Authors: | I. Zlochin, I. Seginer |
| Keywords: | Botrytis cinerea, Environmental control, and Nighttime humidity |
| Abstract:
In greenhouses, loss from fungal diseases, in rose growing for example, can be as high as 20% of production. Many fungal diseases (e.g., botrytis) require water condensation on the leaves for germination. Condensation starts as soon as leaf temperature drops below the dew point temperature of the ambient air. If condensation could be prevented through environmental control, fungicide application could be reduced considerably, while higher quality produce could be obtained. An indication of the onset of condensation might be obtained by using an artificial leaf, which responds to the initial stages of dew formation. Once condensation is detected, a signal may be transmitted to the control system (heating, ventilating and/or dehumidification). Fiber-optic leaf-wetness sensor, based on changes of optical transmission resulting from dew condensation, was developed. | |
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