shows the
temperature difference between leaf and inside air with and
without using screen in the center of the greenhouse. It
shows about 2 and 1 C difference between leaf and inside
air without and with screen. Whenever the leaf temperature
is lower than the air temperature, there is a risk that it will
reach dew point and that condensation on the leaves will
occur. Condensation at night is a very important problem in
greenhouses, since it enhances the development of diseases
(e.g., Botrytis and Late blight). Therefore, it is necessary to keep
the plant leafs warmer than the air, or at least to minimize
the temperature difference between the plant and the air, to
minimize condensation