Worsleya seed/sciarids

David Schaeffer via pbs pbs@lists.pacificbulbsociety.net
Mon, 11 Jan 2021 08:54:01 PST
A nearby Pinguicula collection helps, but Drosera capensis does a good job
as well.

On Mon, Jan 11, 2021, 5:32 AM Johannes-Ulrich Urban via pbs <
pbs@lists.pacificbulbsociety.net> wrote:

> Hello Mike,
>
> Germinating Worsleya seed is not the problem. If the seed is fresh as you
> state, it will germinate easily. I germinated mine with the water flotation
> method.
> The problem came later when the germinated seed was potted. Except one
> they were destroyed by the larvae of sciaridae flies. When I noticed the
> problem it was too late. The same happened with Aloe seedlings.  There are
> very many different species of this fly and some seem to be more aggressive
> than others. I have relatively good results in treating with a solution of
> Bacillus thuringensis ssp. israeliensis. Must be repeated if new flies
> become visible. Warm and damp greenhouse condition encourage Sciaridae. For
> this reason I keep as many seed trays as possible outside in the garden,
> but even there I have noticed and treated the fly, but to a much lesser
> extent.
>
> Hope that helps
>
> Uli
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