On 19/09/2019 09:01, Nick Maclaren wrote:
In article ,
Jeff Layman wrote:

Out of interest, Phytophthora infestans is always associated
with potatoes and tomatoes, but does it have much effect on other,
particularly solanaceous, plants? There is some very limited information
he
https://www.cabi.org/isc/datasheet/40970#tohostsOrSpeciesAffected, but
that's all I've been able to find (and I don't have access to the
reference quoted).

I am pretty sure that it is restricted to genus Solanum, but don't know
if it can affect any of our native species or whether they can act as
hosts. I have certainly not seen it on S. dulcamara and can't swear
to having seen it (ot nor having seen it) on S. nigrum.


Regards,
Nick Maclaren.

Now I'm going to ask a couple of stupid questions.#When a plant catches
blight do the spors come from the ground or the air?
Would covering then with fleece have any deterant effect?