The module true hop mildew according to Engelhard serves
the computation of a prognosis for the fight against the true mildew in the
hop on the base of weather data seized by UK_TOSS. Therefore this module can
be used only in connection with UK_TOSS.
The model true hop mildew according to Engelhard is based
on current research results and investigations of the Bavarian National
Institute of Agriculture. It is explicitly pointed out that it concerns only
a model for the time being, and no guarantee for correct spraying
recommendations can be given.
At the true hop mildew according to Engelhard the days are divided into
two periods. In principle an appeal to spray susceptible sorts takes place
if certain conditions are fulfilled at five consecutive day periods. Only at
Hallertauer Magnum and Hallertauer Taurus, in very critical locations, it
can be shortened to four day periods. At less susceptible sorts such as
Spalter Select or Hallertauer Tradition it should be tested with a spraying
if six successive daily sections apply.