Initial evaluations noted that strobilurin fungicides provided only
fair control of apple rust diseases, but that was to some extent an
artifact of the way that the strobilurins were initially tested in
the US. When Flint and Sovran were introduced, we initially thought
that we could use them
1. Does anyone have experimental data, observations, or at least an
interesting theory, for the mechanism by which Indar and Inspire Super
are more effective the first generation DMIs against apple scab?
Our spray guide assigns Indar the same rating as a protectant
(Fair) and same
I have always suspected that, when compared at the same field use
rates, Polyram might be a little less rain-fast than the mancozeb
fungicides. However, I do not have data to prove that. For several
years I compared Polyram and mancozeb fungicides in my test orchards
to see if I could detect
I'll respond with some observations and opinions, but I'm not certain
that anyone has definitive answers to the questions that you have
posed. Mechanisms that contribute to differing activities for DMI
fungicides most likely involve complex interactions among all of the
following factors:
