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Re: Foliar nematodes

Daniel Nelson wrote:
> From: Denise Nakon
> Subject: Re: Foliar nematodes>
> >What does the damage look like?
> >
> >Denise
> >Michigan
> >---------------------------------------------------------------------
> Denise,
> Foliar Nematode damage appears as a darkening between veins on the hosta
> leaf. The darkening is caused by a secondary fungus infection and not the
> nematodes. Foliar nematode damage usually does not appear until later in the
> season. In the northern U.S. it may not show up until September. In my area,
> zone 7, it shows up about now. Their damage is over looked by many gardeners
> but is a major concern(hopefully) for nursery owners.
> Foliar nematodes are often spread by being splashed by rain and irrigation
> water. They may also spread slowly in the ground. You could spread them by
> walking through a wet hosta garden if you came in contact with infected
> plants.
> There are other plants which also have foliar nematodes. The most likely
> source of a foliar nematode infection is bringing in infected plants.
> There are no chemical controls available for the home gardener. I have heard
> that there are restricted use chemicals that may work. The only control I
> know of is to discard the infected plants. Don't do this just on my say so.
> Check deeper for yourself.
> I have heard that most large hosta collections have some foliar nematodes. I
> have seen some of them myself.
> Additions, corrections and comments are welcome.
> Dan Nelson
> zone 7
> PS. If you think Ronnie uses bad language, try saying "foliar nematodes" in
> someone's hosta patch.
> ---------------------------------------------------------------------
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Thanks for the info, Dan. I appreciate it.

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